DNS Resolution Totally Dead in 10.6.7 (except dig)
My problem, on a 2010 iMac running 10.6.7, is basically identical to Andreas's in this thread, but whereas he tracked it to "the VPN client SonicWall NetExtender" and solved it, I've never even heard of that. As with him, though, the only way I seem to have of connecting a URL to an IP address is with dig; Safari, ping and nslookup all fail when given URLs but succeed when I give them an IP address acquired through dig.
This happened today while I was in the middle of browsing; I don't recall any network problems recently that could have caused it, and I have a MacBook also running 10.6.7 on the same network which has no such problems. The iMac has a history of being unable to see or be seen by the other machines on the LAN (to which it connects via wifi through a Tenda router) but nothing else. Further, the iMac and MacBook give identical results when I run scutil --dns on them. I'm pretty much at a loss. Any suggestions would be greatly appreciated!
Safari gives the error message
Safari can't open the page "[URL]" because your computer isn't connected to the Internet.
on any attempt to access a page by URL. If I put in an IP address it loads fine (aside from not being able to resolve any links to images, etc. which are linked using a domain name).
nslookup google.com on the command line gives the error:
/SourceCache/bind9/bind9-31/bind9/lib/isc/unix/socket.c:4525: bind: No route to host
nslookup: isc_socket_bind: unexpected error
DNS resolution does not work on Firefox either.
All checkboxes in the System Preferences>Network>Advanced>Proxies tab are unchecked. The box at the bottom ("Bypass proxy settings...") contains:
*.local, 169.254/16
Thanks for trying to help me out! I'm happy to provide any other information that might be useful to you.
Similar Messages
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Folks;
*I have Mac OS X Leopard 10.5.6 up to date and since few days, the DNS resolution is very slow, about 5 seconds to resolve names.*
*For example :*
# ping test.com
*(wait 5 seconds)*
PING test.com (205.178.152.103): 56 data bytes
*Of course it also happen in firefox and in all other internet applications. Each time I'm loading a web page, I have to wait 5 seconds...*
*If I try a few seconds later, it answer immediately, but a few minutes later, it take again 5 seconds to resolve the name.*
*I'm not sure, and maybe it's just a coincidence, but it came just after the installation of Adobe Photoshop 4.*
*I think about a virus or some mysterious mac os parameters ...*
*I try* dscacheutil -flushcache *with no effect.*
*My /etc/hosts is :*
nameserver 212.27.40.240
*I only have 1 dns server, and when I try :*
nslookup test.com 212.27.40.240
*It answer immediately :*
Server: 212.27.40.240
Address: 212.27.40.240#53
Non-authoritative answer:
Name: test.com
Address: 205.178.152.103
*I tried with many others DNS and also with a local DNS server (bind) with the same result.*
*The output of :*
# dscacheutil -statistics
Overall Statistics:
Average Call Time - 1.298089
Cache Hits - 1813
Cache Misses - 1888
Total External Calls - 2662
Statistics by procedure:
Procedure Cache Hits Cache Misses External Calls
getpwnam 151 15 166
getpwuid 842 34 876
getpwent 0 0 2
getgrnam 38 18 56
getgrgid 15 16 31
getgrent 0 0 2
getservbyname 7 5 7
getservent 0 0 6
getprotobyname 0 2 2
getfsent 0 0 14
getaddrinfo 0 0 1117
getnameinfo 53 189 242
gethostbyname 537 591 42
gethostbyaddr 16 71 87
gethostbymac 5 4 9
_flushcache 0 0 3
*As you can see, "Average Call Time" is very high, it should be 0.0xxxxx*
*ifconfig output :*
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0 mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 00:1b:63:96:ab:e1
media: autoselect status: inactive
supported media: autoselect 10baseT/UTP <half-duplex> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 10baseT/UTP <full-duplex,flow-control> 100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full-duplex,hw-loopback> 100baseTX <full-duplex,flow-control> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback> 1000baseT <full-duplex,flow-control> none
fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
lladdr 00:1c:b3:ff:fe:86:88:46
media: autoselect <full-duplex> status: inactive
supported media: autoselect <full-duplex>
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 192.168.0.10 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:1b:63:ca:a9:93
media: autoselect status: active
supported media: autoselect
*dtruss output :*
# dtruss ping itt.com
SYSCALL(args) = return
ioctl(0x3, 0x80086804, 0xBFFFE488) = 0 0
close(0x3) = 0 0
__sysctl(0xBFFFE35C, 0x2, 0xBFFFE364) = 0 0
bsdthread_register(0x91CD1F30, 0x91D0A2A4, 0x1000) = 0 0
open_nocancel("/dev/urandom\0", 0x0, 0x0) = 3 0
read_nocancel(0x3, "\377~\360U\360\211\303\231l\2725\002\265\327\247\371N`#_\314.\323@\022u\323\34 6'\224\314\271\0", 0x20) = 32 0
close_nocancel(0x3) = 0 0
mmap(0x0, 0x3000, 0x3, 0x1002, 0x1000000, 0x100000000) = 0x1E000 0
mmap(0x0, 0x200000, 0x3, 0x1002, 0x7000000, 0x100000000) = 0x21000 0
munmap(0x21000, 0xDF000) = 0 0
munmap(0x200000, 0x21000) = 0 0
mmap(0x0, 0x3000, 0x3, 0x1002, 0x1000000, 0x100000000) = 0x21000 0
getpid(0x0, 0x3000, 0x3) = 1436 0
socket(0x2, 0x3, 0x1) = 3 0
getuid(0x2, 0x3, 0x1) = 0 0
setuid(0x0, 0x3, 0x1) = 0 0
getuid(0x0, 0x3, 0x1) = 0 0
getpid(0x0, 0x0, 0x0) = 1436 0
__sysctl(0xBFFFE678, 0x3, 0xBFFFFA98) = 0 0
issetugid(0xBFFFE678, 0x3, 0xBFFFFA98) = 0 0
__sysctl(0xBFFFE534, 0x2, 0xBFFFE4FC) = 0 0
__sysctl(0xBFFFE4FC, 0x2, 0xBFFFE57C) = 0 0
sharedregion_checknp(0xBFFFFA78, 0x2, 0xBFFFE57C) = 0 0
stat("/usr/lib/dtrace/libdtrace_dyld.dylib\0", 0xBFFFD6E8, 0xBFFFE57C) = 0 0
open("/usr/lib/dtrace/libdtrace_dyld.dylib\0", 0x0, 0x0) = 3 0
pread(0x3, "\312\376\272\276\0", 0x1000, 0x0) = 4096 0
pread(0x3, "\316\372\355\376\a\0", 0x1000, 0x9000) = 4096 0
mmap(0x19000, 0x1000, 0x5, 0x12, 0x3, 0x100000000) = 0x19000 0
mmap(0x1A000, 0x1000, 0x3, 0x12, 0x3, 0x100000000) = 0x1A000 0
mmap(0x1B000, 0x1000, 0x7, 0x12, 0x3, 0x100000000) = 0x1B000 0
mmap(0x1C000, 0x1900, 0x1, 0x12, 0x3, 0x100000000) = 0x1C000 0
fcntl(0x3, 0x2C, 0xFFFFFFFFBFFFBD54) = 0 0
close(0x3) = 0 0
stat("/usr/lib/libgcc_s.1.dylib\0", 0xBFFFD4E8, 0xFFFFFFFFBFFFBD54) = 0 0
stat("/usr/lib/libSystem.B.dylib\0", 0xBFFFD4E8, 0xFFFFFFFFBFFFBD54) = 0 0
stat("/usr/lib/system/libmathCommon.A.dylib\0", 0xBFFFD328, 0xFFFFFFFFBFFFBD54) = 0 0
open("/dev/dtracehelper\0", 0x2, 0xBFFFE504) = 3 0
PING itt.com (199.253.127.99): 56 data bytes
sigaction(0x2, 0xBFFEF6E0, 0x0) = 0 0
sigaction(0x1D, 0xBFFEF6E0, 0x0) = 0 0
sendto(0x3, 0x5234, 0x40) = 64 0
select(0x4, 0xBFFFF9DC, 0x0, 0x0, 0xBFFFFB30) = 1 0
recvmsg(0x3, 0xBFFFFAC4, 0x0) = 153 0
setsockopt(0x3, 0xFFFF, 0x400) = 0 0
setsockopt(0x3, 0xFFFF, 0x1002) = 0 0
setsockopt(0x3, 0xFFFF, 0x1001) = 0 0
fstat64(0x1, 0xBFFEEE64, 0x1001) = 0 0
ioctl(0x1, 0x4004667A, 0xBFFEEECC) = 0 0
mmap(0x0, 0x1000000, 0x3, 0x1002, 0x2000000, 0x0) = 0x200000 0
munmap(0x200000, 0x600000) = 0 0
munmap(0x1000000, 0x200000) = 0 0
write_nocancel(0x1, "PING itt.com (199.253.127.99): 56 data bytes\n\0", 0x2D) = 45 0
select(0x4, 0xBFFFF9DC, 0x0, 0x0, 0xBFFFFB30) = 0 0
sendto(0x3, 0x5234, 0x40) = 64 0
©select(0x4, 0xBFFFF9DC, 0x0, 0x0, 0xBFFFFB30) = 0 0
sendto(0x3, 0x5234, 0x40) = 64 0
select(0x4, 0xBFFFF9DC, 0x0, 0x0, 0xBFFFFB30) = 0 0
sendto(0x3, 0x5234, 0x40) = 64 0
^C
*tcpdump output (with # ping ita.fr) :*
# tcpdump -i en1
00:26:06.469246 IP 192.168.0.10.49985 > 192.168.2.1.domain: 64308+ A? ita.fr. (24)
00:26:06.486473 IP 43.242.3.202.dial.dyn.mana.pf.22369 > 192.168.0.10.42567: UDP, length 85
00:26:06.487552 IP 192.168.0.10.42567 > 43.242.3.202.dial.dyn.mana.pf.22369: UDP, length 35
00:26:07.277453 IP 192.168.0.10.49938 > 192.168.2.1.domain: 44176+ PTR? 43.242.3.202.in-addr.arpa. (43)
00:26:09.346380 IP 192.168.0.10.ntp > time4.euro.apple.com.ntp: NTPv4, Client, length 48
00:26:09.541593 IP time4.euro.apple.com.ntp > 192.168.0.10.ntp: NTPv4, Server, length 48
00:26:11.467716 IP 192.168.0.10.61034 > dns1.proxad.net.domain: 64308+ A? ita.fr. (24)
00:26:11.469940 arp who-has 192.168.0.10 tell 192.168.0.254
00:26:11.469996 arp reply 192.168.0.10 is-at 00:1b:63:ca:a9:93 (oui Unknown)
^C
*ps aux output :*
# ps aux
$USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND
root 15 4.2 0.0 599620 284 ?? Ss 10:27AM 0:23.20 /usr/sbin/update
fanzila 330 3.1 0.8 302188 16000 ?? R 12:06PM 0:41.58 /Applications/Utilities/Terminal.app/Contents/MacOS/Terminal -psn0413797
fanzila 994 2.6 8.2 486288 172048 ?? S 11:33PM 5:53.31 /Applications/Firefox.app/Contents/MacOS/firefox-bin -psn01122578
_windowserver 54 2.5 4.6 405476 97200 ?? Ss 10:27AM 6:30.50 /System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphic s.framework/Resources/W
fanzila 1092 1.2 3.2 473732 66856 ?? S 11:52PM 0:34.00 /Applications/Adobe Photoshop CS4/Adobe Photoshop CS4.app/Contents/MacOS/Adobe Photoshop CS4 -psn012
root 33 1.1 0.2 78660 3796 ?? Ss 10:27AM 0:16.79 /usr/sbin/DirectoryService
fanzila 23 0.5 0.4 298916 8368 ?? Ss 10:27AM 0:14.18 /System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow console
fanzila 130 0.5 0.6 305176 13164 ?? S 10:38AM 0:17.71 /System/Library/CoreServices/SystemUIServer.app/Contents/MacOS/SystemUIServer -psn053261
fanzila 1332 0.0 0.1 2926604 2376 ?? S 12:20AM 0:00.10 /Applications/CrossOver.app/Contents/SharedSupport/CrossOver/lib/../bin/wineloa der C:\windows\system32
fanzila 1328 0.0 0.1 79096 2432 ?? Ss 12:20AM 0:01.88 /Applications/CrossOver.app/Contents/SharedSupport/CrossOver/lib/../bin/wineser ver
fanzila 1322 0.0 0.2 2928312 5072 ?? S 12:20AM 0:00.33 /Applications/CrossOver.app/Contents/SharedSupport/CrossOver/bin/wineloader winewrapper.exe --workdir
fanzila 1321 0.0 0.1 217684 2364 ?? S 12:20AM 0:00.05 /Users/fanzila/Library/Caches/Cleanup At Startup/CrossOver CD Helper.app/Contents/MacOS/CrossOver CD H
fanzila 1317 0.0 0.2 78124 4940 ?? Ss 12:20AM 0:00.11 /usr/bin/perl -w /Applications/CrossOver.app/Contents/SharedSupport/CrossOver/bin/cxmenu --bottle winx
fanzila 1316 0.0 0.2 2928312 5072 ?? Ss 12:20AM 0:00.37 /Applications/CrossOver.app/Contents/SharedSupport/CrossOver/bin/wineloader winewrapper.exe --run -- /
fanzila 1313 0.0 0.1 227052 2960 ?? Ss 12:20AM 0:00.10 /usr/bin/quartz-wm
fanzila 1305 0.0 1.2 327344 25868 ?? S 12:20AM 0:01.48 /Applications/CrossOver.app/Contents/MacOS/CrossOver -psn01335622
fanzila 1304 0.0 0.1 225336 3004 ?? S 12:20AM 0:00.13 /Users/fanzila/Applications/CrossOver/DHO.app/Contents/MacOS/CrossOver Helper with Feedback -psn0133
fanzila 1097 0.0 0.2 91876 4644 ?? S 11:52PM 0:00.28 /System/Library/Services/AppleSpell.service/Contents/MacOS/AppleSpell -psn01212712
fanzila 1094 0.0 0.7 327036 15668 ?? S 11:52PM 0:14.38 /Applications/TextEdit.app/Contents/MacOS/TextEdit -psn01208615
fanzila 1093 0.0 0.1 76432 1540 ?? Ss 11:52PM 0:00.07 /Applications/Adobe Photoshop CS4/Adobe Photoshop CS4.app/Contents/Frameworks/AdobeCrashReporter.frame
fanzila 993 0.0 2.9 430152 60324 ?? U 11:33PM 0:20.24 /Applications/Path Finder.app/Contents/MacOS/Path Finder -psn01118481
fanzila 983 0.0 1.9 399876 39104 ?? S 11:32PM 0:19.28 /Applications/Skype.app/Contents/MacOS/Skype -psn01114384
fanzila 982 0.0 1.1 339696 22972 ?? U 11:32PM 0:09.25 /Applications/Adium.app/Contents/MacOS/Adium -psn01110287
fanzila 967 0.0 2.6 355348 53504 ?? S 11:32PM 0:08.98 /Applications/Mail.app/Contents/MacOS/Mail -psn01106190
fanzila 921 0.0 0.0 600252 944 s001 S+ 7:07PM 0:00.06 /bin/bash
fanzila 912 0.0 0.0 600252 756 s001 S 7:07PM 0:00.01 -bash
root 911 0.0 0.1 76592 1104 s001 Ss 7:07PM 0:00.03 login -pf fanzila
_mdnsresponder 646 0.0 0.1 77304 1164 ?? Ss 4:03PM 0:00.10 /usr/sbin/mDNSResponder -launchd
fanzila 635 0.0 0.0 601896 804 ?? S 4:02PM 0:01.19 /usr/local/bin/gpg-agent --launchd --use-standard-socket --write-env-file
root 596 0.0 0.0 600252 952 s000 S 3:55PM 0:00.43 /bin/bash
fanzila 341 0.0 0.0 600252 944 s000 S 12:06PM 0:00.07 /bin/bash
fanzila 332 0.0 0.0 600252 756 s000 S 12:06PM 0:00.02 -bash
root 331 0.0 0.1 76592 1104 s000 Ss 12:06PM 0:00.03 login -pf fanzila
fanzila 298 0.0 0.6 268748 12604 ?? U 11:54AM 0:00.91 /System/Library/CoreServices/Dock.app/Contents/Resources/DashboardClient.app/Co ntents/MacOS/DashboardC
fanzila 297 0.0 0.4 264760 8108 ?? S 11:54AM 0:00.51 /System/Library/CoreServices/Dock.app/Contents/Resources/DashboardClient.app/Co ntents/MacOS/DashboardC
fanzila 296 0.0 0.8 272252 16328 ?? S 11:54AM 0:01.51 /System/Library/CoreServices/Dock.app/Contents/Resources/DashboardClient.app/Co ntents/MacOS/DashboardC
fanzila 295 0.0 0.6 270808 12488 ?? S 11:54AM 0:01.51 /System/Library/CoreServices/Dock.app/Contents/Resources/DashboardClient.app/Co ntents/MacOS/DashboardC
fanzila 294 0.0 0.9 299344 17828 ?? S 11:54AM 0:03.26 /System/Library/CoreServices/Dock.app/Contents/Resources/DashboardClient.app/Co ntents/MacOS/DashboardC
nobody 156 0.0 0.0 76776 632 ?? Ss 10:38AM 0:00.01 /System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/Resources/u sbmuxd -launchd
fanzila 151 0.0 0.1 223464 2408 ?? S 10:38AM 0:00.12 /Applications/iTunes.app/Contents/Resources/iTunesHelper.app/Contents/MacOS/iTu nesHelper -psn0118813
fanzila 144 0.0 0.3 314696 7184 ?? S 10:38AM 0:03.93 /Library/PreferencePanes/Witch.prefPane/Contents/Resources/witchdaemon.app/Cont ents/MacOS/witchdaemon
fanzila 137 0.0 0.1 214952 2960 ?? S 10:38AM 0:00.22 /Library/Printers/hp/hpio/HPEventHandler.app/Contents/MacOS/HPEventHandler -psn069649
fanzila 129 0.0 0.6 279688 12996 ?? S 10:38AM 0:15.74 /System/Library/CoreServices/Dock.app/Contents/MacOS/Dock -psn049164
fanzila 128 0.0 0.3 136856 6420 ?? S 10:38AM 0:08.23 /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framewo rk/Support/ATSServer
fanzila 127 0.0 0.0 76504 536 ?? S 10:38AM 0:00.01 /usr/sbin/pboard
fanzila 126 0.0 0.1 220304 2248 ?? S 10:38AM 0:00.28 /usr/sbin/UserEventAgent -l Aqua
fanzila 125 0.0 0.2 225908 3964 ?? S 10:38AM 0:00.26 /System/Library/CoreServices/Spotlight.app/Contents/MacOS/Spotlight
fanzila 120 0.0 0.2 257568 3348 ?? S 10:38AM 0:00.17 /System/Library/CoreServices/AirPort Base Station Agent.app/Contents/MacOS/AirPort Base Station Agent
fanzila 114 0.0 0.0 600820 560 ?? Ss 10:38AM 0:00.51 /sbin/launchd
root 108 0.0 0.2 79644 3304 ?? Ss 10:29AM 0:01.10 /usr/sbin/coreaudiod
root 95 0.0 0.1 77928 1388 ?? S 10:27AM 0:00.13 /Library/Printers/hp/hpio/HPIO Trap Monitor.app/Contents/MacOS/HPIO Trap Monitor
root 87 0.0 0.0 76572 732 ?? Ss 10:27AM 0:00.12 /Library/Frameworks/HPServicesInterface.framework/Runtime/hpusbmond
root 47 0.0 0.1 86716 1836 ?? Ss 10:27AM 0:00.16 /usr/sbin/blued
root 45 0.0 1.3 116160 27116 ?? Ss 10:27AM 0:05.43 /System/Library/CoreServices/coreservicesd
daemon 43 0.0 0.0 75356 808 ?? Ss 10:27AM 0:01.88 /usr/sbin/distnoted
root 40 0.0 0.1 75704 1500 ?? Ss 10:27AM 0:00.61 /usr/libexec/ApplicationFirewall/socketfilterfw
root 38 0.0 0.0 75388 672 ?? Ss 10:27AM 0:00.03 autofsd
root 35 0.0 0.1 77000 2080 ?? Ss 10:27AM 0:13.02 /usr/sbin/configd
root 32 0.0 0.1 75460 1104 ?? Ss 10:27AM 0:01.04 /usr/sbin/diskarbitrationd
root 29 0.0 0.0 75376 700 ?? Ss 10:27AM 0:00.01 /sbin/dynamic_pager -F /private/var/vm/swapfile
root 27 0.0 0.1 85768 1476 ?? Ss 10:27AM 0:01.70 /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonC ore.framework/Versions/
root 26 0.0 0.0 75896 600 ?? Ss 10:27AM 0:00.01 /usr/libexec/hidd
root 24 0.0 0.0 75448 644 ?? Ss 10:27AM 0:00.01 /usr/sbin/KernelEventAgent
root 21 0.0 2.9 259112 61136 ?? Ss 10:27AM 2:08.30 /System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework /Support/mds
root 19 0.0 0.1 77316 2248 ?? Ss 10:27AM 0:00.64 /usr/sbin/securityd -i
root 16 0.0 0.0 75372 640 ?? Ss 10:27AM 0:00.01 /sbin/SystemStarter
root 14 0.0 0.0 75900 824 ?? Ss 10:27AM 0:02.07 /usr/sbin/ntpd -c /private/etc/ntp-restrict.conf -n -g -p /var/run/ntpd.pid -f /var/db/ntp.drift
root 12 0.0 0.0 601332 464 ?? Ss 10:27AM 0:00.57 /usr/sbin/syslogd
root 11 0.0 0.0 600236 484 ?? Ss 10:27AM 0:00.69 /usr/sbin/notifyd
root 10 0.0 0.1 75968 1228 ?? Ss 10:27AM 0:00.86 /usr/libexec/kextd
root 1460 0.0 0.0 599788 452 s000 R+ 12:27AM 0:00.01 ps aux
root 1 0.0 0.0 600820 564 ?? Ss 10:27AM 0:00.50 /sbin/launchd
_spotlight 1453 0.0 0.1 89116 2000 ?? SNs 12:26AM 0:00.13 /System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework /Versions/A/Support/mdw
fanzila 1425 0.0 0.2 122524 3432 ?? SNs 12:21AM 0:00.24 /System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework /Versions/A/Support/mdw
fanzila 1365 0.0 0.3 2931372 6596 ?? Ss 12:21AM 0:00.36 /Applications/CrossOver.app/Contents/SharedSupport/CrossOver/lib/../bin/wineloa der C:\windows\system32
fanzila 1362 0.0 0.1 78948 1364 ?? S 12:21AM 0:00.11 /System/Library/Frameworks/CoreMIDIServer.framework/MIDIServer
*Many thanks for your help.*fanzila wrote:
Thanks for your help nerowolfe.
If I ping or put in browser any IP, it answer immediately. It's just the resolution.
Then the problem lies with your DNS, perhaps your ISP DNS are simply slow.
I use OpenDNS servers in my router and computer and have very little latency.
Here is their webpage
http://www.opendns.com/solutions/homenetwork/ -
Greetings Gang,
Have an RV082 v1.1 FW 1.3.98-tm that has been rock solid for a couple of years and is now, suddenly, experiencing dead crawl DNS resolution.
No changes in configuration prior to the behavior starting. Tried rebooting the unit, no changein behavior.
There's an internal DNS server that resolves internal resources, but everything else gets pushed to the RV082.
I've tried Comcast, Verizon and Google DNS servers at the router level, and the results are the same -- so that rules out the DNS servers themselves.
Change the DNS servers at the NIC level on a wrokstation, and resolution occurs quickly and reliably.
I'm looking to reset to Factory Default and reload the configuration and likely upgrade to FW 2.0.0.19-tm or 2.0.2.01-tm but I do see similar issues reported with those firmwares, and moreover, in a mixed Mac/PC environment.
Was wondering if anyone else has experienced these issues, could identify a root cause and resolution.
Thanks,
JorgeProbably just corruption, which can happen every so often. A couple of years in service rock-solid is really great.
I experienced similar problems with my rv016s when my ISP changed their backend carrier equipment. I was never able to fix the issue, so I had to reboot them every 8hrs.
I wouldn't upgrade unless you HAVE to. You'll more than likely run into other bugs that breaks your current configuration, even if it's just a site-to-site VPN (I've been there, done that).
Huntsville's Premiere Car and Bike e-magazine: www.huntsvillecarscene.com -
SCOM 2012 SP1 - DNS Resolution failure alert
Hi,
Our customers are receiving bogus DNS resolution failure alerts though the site is rendering fine from the watcher node.Nslookup shows the name resolves after first or 2nd timeout and this behavior is expected in some of our internal name space that have a
long resolution path.Is SCOM perform an nslookup first?What is the default DNS resolution time SCOM use? I'm trying to set higher threshold for DNS Resolution time in custom monitor to mitigate this.Users doesn't want to disable the DNS resolution monitor
and looking for a permanent fix.This issue has been going on a while in our environment. Any help would be much appreciated. Our SCOM is 2012 sp1 CU4.
C:\Users\admin>nslookup xxxx
Server: abc.contosso.com
Address: 10.4.5.6
Non-authoritative answer:
DNS request timed out.
timeout was 2 seconds.
Name: abc.xyz.contosso.com
Address: 10.2.3.4
Aliases: abc.xyx.contosso.com
Thanks,Thanks.As a temporary mitigation, I have disabled the DNS Resolution Failure Monitor for the url to stop the false alert and it worked so far but it started again and this time it alerted for the error code failure.It appears DNS resolution failure is the
culprit .Any insight why error code failure monitor is additionally checking for DNS resolution failures? The DNS Resolution Failure monitor is already in disabled state.Any way we can disable this DNS checks without disable error code failure monitor?
Error Code Failure health explorer,
Base Page (show/hide details)
HTTP Status Code
0
Unreachable
false
Error Code
2147954407
DNS Resolution Failure
true
DNS Resolution Time (seconds)
0
TCP Connect Time (seconds)
0
Time To First Byte (seconds)
0
Time To Last Byte (seconds)
0
Redirect Time (seconds)
0
Download Time (seconds)
0
Total Response Time (seconds)
0
Content Size (bytes)
0
Secure Failure Code
0 -
Problem: Slow Intranet Sites/Internal DNS Resolution for only AD Users
Hello,
We are experiencing a very odd problem.
Any and All Active Directory users are experiencing very slow intranet sites.
We are a school corporation, so this is affecting our Student Information System, as it is entirely web-based and locally hosted.
All of our Domain Controllers are Windows Server 2012 R2, with all the latest critical updates.
All client workstations are Windows 8.1 Professional.
The problem occurs with ALL web browsers (IE, Chrome, FF, etc)
All DNS queries respond in <1 ms (no matter whether we are logged in as AD User or local computer user).
If we login as local computer user, we have blazing fast intranet sites/DNS resolution.
If we login as AD user, everything crawls again... every click on the intranet site spins and says loading for up to 15 seconds.
If we add the the intranet site to the local computer HOST file, it is blazing fast, just as if we logged on as local computer user.
If we take it back out of the HOST file, it drags again.
I am totally stumped!
Any help is appreciated.
Thanks!Hi,
How are DNS settings configured?
If there are any public DNS IP addresses in Preferred or Alternate field, please remove them, then input these DNS entries in the Advanced section. We should only configure Domain Controllers’ IP addresses on Preferred
and Alternate DNS server section for domain-joined machines.
More information for you:
Active Directory’s Reliance on DNS, and using an ISP’s DNS address
http://blogs.msmvps.com/acefekay/2009/08/17/ad-and-its-reliance-on-dns/
Best Regards,
Amy -
So my Ipod will no longer turn on. i leave it on my Ihome and nothing happens. whenever i try to turn it on i get the Apple logo and then it dies and says i should charge it, so i do and it does it again. What does this mean? is my battery totally dead? please i really need help
Did you try to charge it using the adapter or your computer?
If you can, let it charge for about 15min, then connect in recovery mode, described in this article:
iOS: Unable to update or restore
If still not luck, your battery might have to be replaced:
Apple - Support - Service Answer Center -
My ipod 32gb 1st generation battery went totally dead because the usb cable was defective. I have since replaced the cable but now itune will not launch automatically as it did before and windows xp does not recognize it. Nonetheless it is charging. However can i resolve these issues bearing in mind that i am not tech savvy?
have since replaced the cable but now itune will not launch automatically as it did before and windows xp does not recognize it.
Try disabling a/v software and turn off the Firewall on your PC.
Disable antivirus software
Turn-Windows-Firewall-on-or-off
Then connect the iPod to your computer. Launch iTunes. If your computer still won't recognize the iPod check out this article.
http://support.apple.com/kb/TS1538
Once your iPod is functioning again, with it connected to your computer, launch iTunes. Select the iPod under Devices in the source list on the left.
Select the box next to: Open iTunes when this iPhone is connected
That way iTunes should open automatically when you connect your iPod to your computer.
And iTunes / Preferences - Devices. You can have your iPod sync automatically whenever it's connected from the Devices pane. -
We recently switched hardware and server software Win SBS 2008 to 2012R2 for a small network roughly 40 clients (Win7 Pro / Win 8.1 Pro) about 16 running concurrently at a given time and one network printer with the printer queue residing on the DC as well.
I read that a single server environment might not be ideal in particular no fail-over but that is an accepted risk in this particular network here.
Errors:
Error 1043: Timeout during name resolution request
Error 1129: Group policy updates could not be processed due to DC not available
Error 5719: Could not establish secure connection to DC, DC not available
Occasionally but disappears after a while
Error 134: As a result of a DNS resolution timeout could not reach time server
Symptoms
On Win 7 Clients
Network shares added through Group Policy will not show sometimes
Network shares disconnect (red X) and when accessed return access authorization error after one or two clicks on the share finally grant access again
When the issue with accessing network shares occurs, it usually also affects Internet access meaning a 'server not responding' error appears in the browser windows when trying to open just any web page
nslookup during the incident returns cannot resolve error
ipconfig on client shows correct default router (VDSL Router) and DHCP / DNS Domain Controller
Also, the Win system log shows the above errors during these incidents, however, the nuimber of incidents vary from 20-30
On Win 8.1 Clients
Same as above with the slight variation for network shares apparently due to Server 2012 and Win 8.1 clients managing drive shares differently. However, network share refresh does not work with this clients. In most cases only a gpupdate /force returns
drive shares but usually only for the active session. After logoff / logon the shares are gone again.
The issue does appear to be load related since it occurs even if there are only one or two workstations active.
Server Configuration
Dell R320 PowerEdge 16GB / 4TB 7200RPM RAID10 / GBitEthernet
Zyxel 1910-48 Port Switch
VDSL 50Mbps Down / 20Mbps Up
Since the DC is the only local DNS and there are no plans to add another one or move DNS to another server, the DNS server is configured with this own address as preferred DNS with three DNS forwarders 1) VDSL Router 2) ISP DNS1 3) ISP DNS2
Currently only one Network card is active for problem determination reasons.
There appears to be no consensus concerning IPV6 enabled or disabled, I tried both with no apparent effect
I have set all network cards server and client to Full Duplex and the same speed, also disabled Offload functions within the adapter settings. Some but no consistent improvements.
Best Practice Analyzer Results
DNS server scavening not enabled
Root hint server XYZ must respond to NS queries for the root zone
More than one forwarding server should be configured (although 3 are configured)
NIC1 should be configured to use both a preferred and alternate DNS (there is only one DNS in this network)
I have found some instructions to apply changes to the clients through a host file but I would rather like to understand whether this DNS response time issue can be resolved on the server for example timing setting perhaps. Currently the DNS forwarders are
set to 3 second.
Since a few people have reported issues with DNS but most are working with multi DNS, DC environment I could not really apply any suggestions made there. perhaps there is anyone like me who is running a single server who has overcome or experience the same
issues. Any help would be appreciatedHello Milos thx for your reply.. my comments below
1. What does it "switched"? You may mean migration or new installation. We do not know...
>> Switched is probably the incorrect term, replaced would be the appropriate wording. Before, there was a HP Proliant Server with SBS 2008 with distinct domain and now there is a Dell Server with MS 2012 R2 with a distinct domain. Client were
removed from one (SBS) domain and added to the new Server 2012 domain. Other components did not change for example same Network Switch or VDSL Router, Workstations and Printer
2. Two DCs are better alternative. Or backup very frequently. There are two groups of administrators. Those who have lost DC and those who will experience this disaster in near future.
>> Correct, and I am aware of that
3. NIC settings in W 7 and W 8.1, namely DNS points to DC (...and NOTHING else. No public IP or that of router DNS.))
>> Correct, this is how it's currently implemented. Clients point to DC for DHCP and DNS and Default Router, no public IP or DNS. The only references to ISP DNS exist on the VDSL Router itself as provided through ISP when establishing VDSL
Link and the list of Forwarders in the DNS Server configuration. However, I have just recently added the ISPs DNS as forwarders for test purposes and will probably learn tomorrow morning whether this had any effect for better or worse.
4. Do nslookup to RR on clients. RR branch is saying client basic info on LDAP parameters of AD.
>> Will post as soon as available
5. I do not use forwarders and the system works
>> Ok, does this mean it works for you in a similar or the same infrastructure setup or are you saying it is not required at all and I can remove any forwarder in a scenario like mine? If not required can you explain a bit more why it is not
required apart from that it does work for you that way?
6. DHCP should sit on DC (DHCP on router is disabled)
>> Correct, no other device is configured to provide DHCP service other than DC and DHCP is currently running on DC
7. NIC settings in DC points to itself (loopback address 127.0.0.1)
>> Are you sure this is still correct and does apply to Server 2012? I am reading articles stating that it should be the servers own IP but local loop or should this be added as alternate DNS in addition to the servers own IP?
8. Use IPCONFIG /FLUSHDNS whenever you change DNS settings.
>> OK, that was not done every time I changed some settings but I can do that next week. Reboot alone would not suffice, correct?
9. Test your system with dcdiag.
>> See result below
10. Share your findings.
Regards
Milos
Directory Server Diagnosis
Performing initial setup:
Trying to find home server...
Home Server = GSERVER2
* Identified AD Forest.
Done gathering initial info.
Doing initial required tests
Testing server: Default-First-Site-Name\GSERVER2
Starting test: Connectivity
......................... GSERVER2 passed test Connectivity
Doing primary tests
Testing server: Default-First-Site-Name\GSERVER2
Starting test: Advertising
......................... GSERVER2 passed test Advertising
Starting test: FrsEvent
......................... GSERVER2 passed test FrsEvent
Starting test: DFSREvent
......................... GSERVER2 passed test DFSREvent
Starting test: SysVolCheck
......................... GSERVER2 passed test SysVolCheck
Starting test: KccEvent
......................... GSERVER2 passed test KccEvent
Starting test: KnowsOfRoleHolders
......................... GSERVER2 passed test
KnowsOfRoleHolders
Starting test: MachineAccount
......................... GSERVER2 passed test MachineAccount
Starting test: NCSecDesc
......................... GSERVER2 passed test NCSecDesc
Starting test: NetLogons
......................... GSERVER2 passed test NetLogons
Starting test: ObjectsReplicated
......................... GSERVER2 passed test
ObjectsReplicated
Starting test: Replications
......................... GSERVER2 passed test Replications
Starting test: RidManager
......................... GSERVER2 passed test RidManager
Starting test: Services
......................... GSERVER2 passed test Services
Starting test: SystemLog
......................... GSERVER2 passed test SystemLog
Starting test: VerifyReferences
......................... GSERVER2 passed test VerifyReferences
Running partition tests on : ForestDnsZones
Starting test: CheckSDRefDom
......................... ForestDnsZones passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... ForestDnsZones passed test
CrossRefValidation
Running partition tests on : DomainDnsZones
Starting test: CheckSDRefDom
......................... DomainDnsZones passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... DomainDnsZones passed test
CrossRefValidation
Running partition tests on : Schema
Starting test: CheckSDRefDom
......................... Schema passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... Schema passed test CrossRefValidation
Running partition tests on : Configuration
Starting test: CheckSDRefDom
......................... Configuration passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... Configuration passed test CrossRefValidation
Running partition tests on : GS2
Starting test: CheckSDRefDom
......................... GS2 passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... GS2 passed test CrossRefValidation
Running enterprise tests on : GS2.intra
Starting test: LocatorCheck
......................... GS2.intra passed test LocatorCheck
Starting test: Intersite
......................... GS2.intra passed test Intersite
Server: gserver2.g2.intra
Address: 192.168.240.6
*** gserver2.g2.intra can't find g2: Non-existent domain
> gserver2
Server: gserver2.g2.intra
Address: 192.168.240.6
g2.intra
primary name server = gserver2.g2.intra
responsible mail addr = hostmaster.g2.intra
serial = 443
refresh = 900 (15 mins)
retry = 600 (10 mins)
expire = 86400 (1 day)
default TTL = 3600 (1 hour)
> wikipedia.org
Server: gserver2.g2.intra
Address: 192.168.240.6
Non-authoritative answer:
wikipedia.org MX preference = 10, mail exchanger = polonium.wikimedia.org
wikipedia.org MX preference = 50, mail exchanger = lead.wikimedia.org
polonium.wikimedia.org internet address = 208.80.154.90
polonium.wikimedia.org AAAA IPv6 address = 2620:0:861:3:208:80:154:90
lead.wikimedia.org internet address = 208.80.154.89
lead.wikimedia.org AAAA IPv6 address = 2620:0:861:3:208:80:154:89
Final benchmark results, sorted by nameserver performance:
(average cached name retrieval speed, fastest to slowest)
192.168.240. 6 | Min | Avg | Max |Std.Dev|Reliab%|
----------------+-------+-------+-------+-------+-------+
+ Cached Name | 0,001 | 0,002 | 0,003 | 0,001 | 100,0 |
+ Uncached Name | 0,027 | 0,076 | 0,298 | 0,069 | 100,0 |
+ DotCom Lookup | 0,041 | 0,048 | 0,079 | 0,009 | 100,0 |
---<-------->---+-------+-------+-------+-------+-------+
gserver2.g2.intra
Local Network Nameserver
195.186. 4.162 | Min | Avg | Max |Std.Dev|Reliab%|
----------------+-------+-------+-------+-------+-------+
- Cached Name | 0,022 | 0,023 | 0,025 | 0,000 | 100,0 |
- Uncached Name | 0,025 | 0,071 | 0,274 | 0,065 | 100,0 |
- DotCom Lookup | 0,039 | 0,040 | 0,043 | 0,001 | 100,0 |
---<-------->---+-------+-------+-------+-------+-------+
cns8.bluewin.ch
BLUEWIN-AS Swisscom (Schweiz) AG,CH
195.186. 1.162 | Min | Avg | Max |Std.Dev|Reliab%|
----------------+-------+-------+-------+-------+-------+
- Cached Name | 0,022 | 0,023 | 0,026 | 0,001 | 100,0 |
- Uncached Name | 0,025 | 0,072 | 0,299 | 0,066 | 100,0 |
- DotCom Lookup | 0,039 | 0,042 | 0,049 | 0,003 | 100,0 |
---<-------->---+-------+-------+-------+-------+-------+
cns7.bluewin.ch
BLUEWIN-AS Swisscom (Schweiz) AG,CH
8. 8. 8. 8 | Min | Avg | Max |Std.Dev|Reliab%|
----------------+-------+-------+-------+-------+-------+
- Cached Name | 0,033 | 0,040 | 0,079 | 0,011 | 100,0 |
- Uncached Name | 0,042 | 0,113 | 0,482 | 0,097 | 100,0 |
- DotCom Lookup | 0,049 | 0,079 | 0,192 | 0,039 | 100,0 |
---<-------->---+-------+-------+-------+-------+-------+
google-public-dns-a.google.com
GOOGLE - Google Inc.,US
UTC: 2014-11-03, from 14:33:12 to 14:33:29, for 00:17,648
15: 40
192.168.240. 6 | Min | Avg | Max |Std.Dev|Reliab%|
----------------+-------+-------+-------+-------+-------+
+ Cached Name | 0,001 | 0,002 | 0,004 | 0,000 | 100,0 |
+ Uncached Name | 0,025 | 0,074 | 0,266 | 0,063 | 100,0 |
+ DotCom Lookup | 0,042 | 0,048 | 0,075 | 0,007 | 100,0 |
---<-------->---+-------+-------+-------+-------+-------+
gserver2.g2.intra
Local Network Nameserver
195.186. 1.162 | Min | Avg | Max |Std.Dev|Reliab%|
----------------+-------+-------+-------+-------+-------+
- Cached Name | 0,022 | 0,024 | 0,029 | 0,001 | 100,0 |
- Uncached Name | 0,024 | 0,073 | 0,289 | 0,067 | 100,0 |
- DotCom Lookup | 0,039 | 0,041 | 0,043 | 0,001 | 100,0 |
---<-------->---+-------+-------+-------+-------+-------+
cns7.bluewin.ch
BLUEWIN-AS Swisscom (Schweiz) AG,CH
195.186. 4.162 | Min | Avg | Max |Std.Dev|Reliab%|
----------------+-------+-------+-------+-------+-------+
- Cached Name | 0,022 | 0,024 | 0,029 | 0,001 | 100,0 |
- Uncached Name | 0,025 | 0,073 | 0,286 | 0,065 | 100,0 |
- DotCom Lookup | 0,041 | 0,066 | 0,180 | 0,037 | 100,0 |
---<-------->---+-------+-------+-------+-------+-------+
cns8.bluewin.ch
BLUEWIN-AS Swisscom (Schweiz) AG,CH
8. 8. 8. 8 | Min | Avg | Max |Std.Dev|Reliab%|
----------------+-------+-------+-------+-------+-------+
- Cached Name | 0,033 | 0,038 | 0,077 | 0,009 | 100,0 |
- Uncached Name | 0,042 | 0,105 | 0,398 | 0,091 | 100,0 |
- DotCom Lookup | 0,049 | 0,066 | 0,141 | 0,025 | 100,0 |
---<-------->---+-------+-------+-------+-------+-------+
google-public-dns-a.google.com
GOOGLE - Google Inc.,US
UTC: 2014-11-03, from 14:39:59 to 14:40:12, for 00:13,363 -
DNS-resolution doesn't work with VPN
Hello,
I setup a l2tp vpn connection in the iPhone and nearly all works perfectly. But the most important part doesn't work: The DNS-resolution after connecting to the VPN.
It's possible to send pings over the 'ping'-App and I also can ping the iPhone from the network. Safari also works with IP-Adresses. But when I try to use a hostname the resolution fails. Equally for internal and external addresses.
On my MacBook Pro the VPN works and Mac OS is able to resolv hostnames. So the server should be alright.
So I think there is a bug in the resolver-part of iPhone OS. Please fix this Apple.
Kind regards,
lord-of-linuxThanks for your hint to send this as a bug report. But today I had time and continued testing and changed some settings of my l2tp-Server and now I's working fine. I don't know where I had the mistake, but it seems that it was my fault.
Now the only problem I have to solve is access over NAT, but this is not iPhone specific. -
HT201263 iPhone 4S totally dead
Hi.. Last night before going to sleep my iphone4S was about 5% charge and plugged on the charger but instead for charging, it was discharging very quickly till it shutted down and screen got black and no red bar appearing whenever i click the home lor the power button.. Thought it was nothing cause i was so sleepy and left it charging till this morning, i found my iphone dead with nothing appearing on the screen even if i press the power or home button, totally dead.. Ive tried to plug it on my pc(where i usually sync my iphone) and also tried to press the home and power button to exit DFU like i used to do but nothing happened.. I also tried plugging my charger to my ipad and it works on my ipad and even trying my ipad charger to my iphone but still the same..
I really need my phone for all of my contacts and some lists that are saved in the notes, so hope u can help me with this problem.. I really love my iphone so badly and i really need it..I also got this same problem like u. I have an iphone 4s, after updating ios 7 it was good for about 3 days. Then after 3 days suddenly my phone automatically switched off and i was unable to switch it on. Besides the phone was not taking charge from the socket. And also was not connecting to itunes. Then i pressed the home and switch button for about 7 seconds and turned it completely off. And now after 2 days this afternoon i tried to switch on the phone. And it was just a miracle that my phone automatically started to work. And now um enjoying my phone then ever.
I think u should try it like me hope that will fine. -
ISE ver 1.1.3.124 - DNS Resolution Errors.
I am having a very strange issue with ISE version 1.1.3.124 running as a VM on UCS.
When I login to ISE GUI using my browser I see a large number of Alarms:
Alarm
Occurred At:
Mon Apr 15 19:45:01 UTC 2013
Cause:
DNS resolution failure on host device_name01.abc.xyz.com
Details:
DNS resolution failed for the hostname device_name01.abc.xyz.com
against the currently configured name servers. Ensure that you have configured a reachable name server using the 'ip name-server <servername>' CLI.
I have the 'ip name-server x.y.z.1' command configured in ISE using the CLI.
From the CLI I resolve any other device names by PINGing from ISE CLI to any of my other devices in the network. So DNS seems to be working fine.
But why am I getting the Alarms in ISE?
Thanks for any help or suggestion in advance.
Regards.
Adil.Can you confirm that you have an A record for the ISE node configured on your DNS Server?
If there is only a CNAME record, then you may see the specified error message. -
Changes in DNS resolution in Mac OS X Snow Leopard
Disclaimer: Apple does not necessarily endorse any suggestions, solutions, or third-party software products that may be mentioned in the topic below. Apple encourages you to first seek a solution at Apple Support. The following links are provided as is, with no guarantee of the effectiveness or reliability of the information. Apple does not guarantee that these links will be maintained or functional at any given time. Use the information below at your own discretion.
There have been two major changes in DNS resolution in Mac OS X Snow Leopard as compared to Mac OS X Leopard and previous releases, and this tip is intended to explain them.
1) User-specified DNS servers, if any, are now used to the exclusion of all others
DNS server addresses may be manually-specified by users via the Networking preference pane by selecting the active interface (e.g. AirPort, Ethernet, etc.), the clicking the "Advanced…" button in the lower right hand corner of the window, and selecting the "DNS" tab.
DNS server addresses may also be provided by a DHCP server.
In Mac OS X Snow Leopard, if any DNS servers are manually specified, they will be the only DNS servers consulted; any DNS servers specified via DHCP will be ignored
This differs from Mac OS X Leopard and previous releases of Mac OS X, as in those releases, if DNS servers were specified manually as well as provided via DHCP, the manually-specified server(s) would be queried first, and if those requests failed, requests would then be sent to any DNS server(s) specified via DHCP.
This means that in Mac OS X Snow Leopard, if queries to manually-specified DNS servers fail, the request will be considered to have failed and no DHCP-specified DNS server will ever be queried.
Users may encounter this because at some point a DNS server (which is no longer functioning or reachable) was manually set in a work or other environment and they had forgotten about it since the previous behavior was for failed requests to "fall through" to DHCP-specified servers.
Because of the change in behavior, those same systems will fail to resolve any DNS requests in Mac OS X Snow Leopard.
2) mDNSResponder does not honor DNS server ordering
While not explicitly documented, in Mac OS X versions earlier than Snow Leopard, DNS servers, whether specified manually or via DHCP, were queried in the order they were provided. For manual specification, this means in the order shown in the appropriate Network preferences pane tab, and for DHCP users in the order specified by the DHCP server.
This is no longer true in Mac OS X Snow Leopard; instead mDNSResponder now seems to occasionally change the order in which it queries DNS servers from that in which they were specified.
This has caused some users issues when DNS servers are specified in a specific sequence.
For example, say your network has two DNS servers, a main server at address 192.168.100.1, and a secondary server at 192.168.100.2, which is normally only to be used if the primary DNS server fails as it is slower and/or has a slower link to the Internet.
If they were specified in that order, past versions of Mac OS X would query them in that order, and unless a failure occurred contacting the primary server, the second server specified would never be contacted.
In Mac OS X Snow Leopard, under various conditions mDNSResponder will instead decide to route all DNS queries to the second DNS server specified, perhaps as a method of routing DNS queries in a round-robin fashion.
Nevertheless, this behavior is unexpected to most users, and may cause issues if the previous behavior was expected.
The only workaround is to realize that Mac OS X Snow Leopard treats all specified DNS servers as being equally capable and to specify DNS servers, either manually or via DHCP, accordingly.
This is the 1st version of this tip. It was submitted on November 15, 2009 by William Kucharski.
Do you want to provide feedback on this User Contributed Tip or contribute your own? If you have achieved Level 2 status, visit the User Tips Library Contributions forum for more information.This tip is now ready for publication.
-
7500 Prism - Totally Dead. Need some help badly...
Heya! I've had my 7500 Prism for a very long time and the only bad thing about it was that it sometimes used to freeze when playing a video. However, this bug got annoying enough to make me made the snap decision to update my firmware version. So far, so good, but there were no newer versions for my Product Code, so I changed it and updated. Unfortunately, I lost my native language menu in the process (should have known better), and I decided to downgrade. At this point, something during the downgrade went wrong and now my phone is totally dead. It won't boot and it won't even charge. Something like "Charger not supported" comes up and I am using the original charger. When it had enough battery, it went as far as showing the Nokia logo and than turned off on itself. I have tried to fix it by restoring the original version, but the computer can't pick it up fast enough before it goes off again and so all the programs I've tried can't detect the phone. Since I am laical in this area, I've figured someone from the forums with much more knowledge than myself could help me out So, I am open to suggestions. Thanks in advance!
Well I'd lie if I say that I didnt see that comming Okay, thanks, I'll check these unofficial forums you mentioned. I had no idea that something could go so wrong (softwarewise) to render my Prism useless...
-
Error NtpClient was unable to set a manual peer. DNS resolution error When using IP address.
Hya,
We have been migarting to some new DCs. one of the new DCs now has all the master roles call it DC01.
when I try and sync/setup NTP on this server as the the authoritive NTP in the doamin I get:
NtpClient was unable to set a manual peer to use as a time source because of DNS resolution error on '”10.*.*.*,0x1”'. NtpClient will try again in 15 minutes and double the reattempt interval thereafter. The error was: No such host is known. (0x80072AF9)
I am using the following commands to set NTP up on the server.
>net stop w32time
>w32tm /config /syncfromflags:manual /manualpeerlist:"10.*.*.*,0x1"
>w32tm /config /reliable:yes
>net start w32time.
Is anyone aware of what the issue could be?
Ps one of the old dc can still sync to this site manually if tried.
cheers MikeHi,
First make sure your DNS is working properly, then please try this article below:
Event ID 134 — Manual Time Source Acquisition
http://technet.microsoft.com/en-us/library/cc756393(v=ws.10).aspx
Hope this helps. -
Iphone 4s will not charge unless the battery is totally dead.
I just got my iPhone 4s 2 days ago. The first day it charged over night with no problem. The 2nd day I put it on the charger at the end of the day and nothing happened. It didn't even show that it was connected to the charger... nothing. I tried turning it off and plugging it in, this gave me the apple logo and turned the phone on, but still no indication of charging. I left the phone on the charger and went to bed (it was at about 30%) and when I woke up it was totally dead. I unplugged it, then plugged it back in and the charging screen came up and the phone turned on and charged. It took 2 hours or less to charge to 100% and it hasn't had any trouble holding that charge today. What is going on with this??? I will probably call customer service after work today, but I'm just curious if anyone else has had this problem or knows what is going on! Thank you!
Yes I tried multiple sockets, nothing worked. It was still hooked up when I woke up, but dead, I unplugged and replugged and it started charging. The night before I had tried everything and there was no sign on the phone that I even had it plugged in other than when I turned it off if I plugged it in it would turn on.
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