B109n-z making my network connection drop

Just got a B109n-z. It connects fine wirelessly and works no problem either with wireless or USB. But, everytime I press 'Print' I completeley lose connection to my router. I can't even see it. It will reconnect briefly in Device Manager but keeps losing it every couple of minutes until I reboot. If I don't print I don't have any problems. I can still print wirelessly when I can't see the router but can't go online. Any ideas???

Tell me your brand/model router and your ISP type. I have a few ideas....
Say thanks by clicking "Kudos" "thumbs up" in the post that helped you.
I am employed by HP

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Internet freezes then network connections drop?

New iMac with OS 10.7.2 Lion, I am experiencing frequent internet freezes and then all my network connections drop and I have to reboot the machine
to continue working. It works fine for awhile then same thing! Anyone else having this issue? I am not using Wifi, we are using ethernet connection through a network. All of our other macs and pc's have no issues at all so it leads me to believe its the new Mac?

William, here's what I get.
Dec 12 09:13:15 Ricks-iMac crashdump[1554]: smbd crashed
Dec 12 09:13:15 Ricks-iMac crashdump[1554]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:13:20 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:13:21 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:13:23 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:13:27 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:13:35 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:13:38 Ricks-iMac crashdump[1561]: smbd crashed
Dec 12 09:13:38 Ricks-iMac crashdump[1561]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:13:51 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:14:29 Ricks-iMac crashdump[1568]: smbd crashed
Dec 12 09:14:29 Ricks-iMac crashdump[1568]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:16:14 Ricks-iMac crashdump[1582]: smbd crashed
Dec 12 09:16:14 Ricks-iMac crashdump[1582]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:16:35 Ricks-iMac crashdump[1588]: smbd crashed
Dec 12 09:16:35 Ricks-iMac crashdump[1588]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:17:26 Ricks-iMac crashdump[1597]: smbd crashed
Dec 12 09:17:27 Ricks-iMac crashdump[1597]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:18:34 Ricks-iMac crashdump[1614]: smbd crashed
Dec 12 09:18:34 Ricks-iMac crashdump[1614]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:18:44 Ricks-iMac automount[139]: Could not resolve Bonjour service [Prepress 4] because our we hit our resolution timeout of 5 seconds\n
Dec 12 09:19:05 Ricks-iMac crashdump[1625]: smbd crashed
Dec 12 09:19:05 Ricks-iMac crashdump[1625]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:19:15 Ricks-iMac crashdump[1628]: smbd crashed
Dec 12 09:19:15 Ricks-iMac crashdump[1628]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:19:38 Ricks-iMac crashdump[1635]: smbd crashed
Dec 12 09:19:38 Ricks-iMac crashdump[1635]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:20:27 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:28 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:28 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:28 Ricks-iMac crashdump[1641]: smbd crashed
Dec 12 09:20:29 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:29 Ricks-iMac crashdump[1645]: smbd crashed
Dec 12 09:20:29 Ricks-iMac crashdump[1641]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:20:29 Ricks-iMac crashdump[1645]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:20:30 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:34 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:36 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:37 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:39 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:42 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:50 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:20:58 Ricks-iMac mDNSResponder: ERROR: getOptRdata - unknown opt 4
Dec 12 09:22:11 Ricks-iMac crashdump[1661]: smbd crashed
Dec 12 09:22:11 Ricks-iMac crashdump[1662]: smbd crashed
Dec 12 09:22:11 Ricks-iMac crashdump[1661]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:22:11 Ricks-iMac crashdump[1662]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:22:13 Ricks-iMac crashdump[1664]: smbd crashed
Dec 12 09:22:13 Ricks-iMac crashdump[1664]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log
Dec 12 09:22:35 Ricks-iMac crashdump[1670]: smbd crashed
Dec 12 09:22:35 Ricks-iMac crashdump[1670]: crash report written to: /Library/Logs/CrashReporter/smbd.crash.log

Satellite L300 PSLBGE network connection drops at random times

Hey,
I've had this problem with my laptop since I bought it 1.5 years ago.
Now I run Windows 7 x64, with the latest bios (version 2.20-WIN; date 25/02/10), chipset and wireless (the card is a: Realtek Wireless LAN Adapter 8187B; driver version: 62.1182.0331.2010) drivers.
The problem is that my network connection drops at random times.
This happens both with my wireless and lan card and it happens with a variety of routers ( at work and at home I use a linksys wrt54gl but I have tried it on other routers with the same result).
I don't think this is a hardware fault since the network seems to work fine under Linux ( I've tried Ubuntu 10 ) . Also a while back I took it to the warranty service and they said the hardware is fine but I should "not use many programs at the same time and use Windowx XP".
From what I understand the various devices (wireless card, network card, webcam, etc) inside the laptop are connected to some sort of usb hub. My guess is that is something wrong with this 'hub' since the webcam is also working faulty.
Thanks,

>From what I understand the various devices (wireless card, network card, webcam, etc) inside the laptop are connected to some sort of usb hub. My guess is that is something wrong with this 'hub' since the webcam is also working faulty.
No, the WLan card and LAN card are not connected to any USB interfaces just the webcam so this cannot be any USB issue.
I think it could be an Windows issue since Linux is OK
I think you should check the power management settings in Win 7 and for Wlan /LAN card. This can be done in device manager -> WLan / LAN card properties -> Advanced tab.
I recommend also updating the Win 7 to the latest state install all updates and patches

Hyper-V 2008 R2 Network Connection Drops on a VM

Hyper-V Host: Dell PowerEdge R620 Server with 8 NIC, 256GB RAM connected to iSCSI SAN running Windows 2008 R2 SP1
Guest Machine(s): Windows 2008R2 or 2012 servers (total of 8 servers)
Symptom: Windows 2008 R2 server drops the network connection. Cannot PING or access the server. Tried rebooting guest server, but still not able to connect. So changed the network connection via Hyper-V Management console to another
virtual adapter, and the system comes back online immediately.
Logical thinking: The NIC must be bad. But the problem continued at random times (like once or twice a week - especially in the morning with heavy network traffic load). So, I switched the network back to the original Virtual NIC, and the system
runs fine.
So it seems that the Hyper-V randomly "kills" the NIC when it is utilizing heavy I/O load. And only way to fix it at this time is to swap the virtual NIC (5 sec but need to do manually). Tried add another NIC to provide additional bandwidth,
but same problem exists.
Is there some sort of patch available to address this? Or maybe registry update to IGNORE the heavy I/O on a Guest OS?
I looked into http://support.microsoft.com/kb/2263829/en-us but this seems to be a different issue as the article states that the machines comes online when rebooted where as that is not the case on my part.

Hi,
The best place for this is in the Hyper-V forum, this forum if for Virtual Server 2005.
http://social.technet.microsoft.com/Forums/windowsserver/en-US/home?forum=winserverhyperv
You'll get a lot more Hyper-V eyes on it there.
Also, what type of NICs, updated drivers, teaming, etc?

Wireless network connection drops on my Tecra A4

Hi,
When I am downloading a file ( or just only connected to the web), the connection drops about every 30 seconds for a few seconds. I have tried a lot things, like changing the channel, changing the security setting (wpa/wep), tried another places in the house, but if I sit only a meter from the router, I have the same problem.
The strange thing is the the computer that is directly connected by cable to the router does not show any problems at all..
also see http://www.sappa.nl/dumeter.jpg for an illustration of my problem.
I have read about a possible solution (http://arstechnica.com/news/posts/1080251780.html) by turning off the windows net zero service, and instead of this service to use a different program to search and connect to your network (configfree?!)
I am using a netgear WPN824 router
My laptop is a Tecra A4
Greetings!

Hi
Its not easy to give you a proper answer.
If your unit works with the Atheros WLan card you should use the Atheros Client Utility to configure the WLan settings and the option Use Windows to configure my wireless in the Wireless network properties should be disabled.
Furthermore please check the Toshiba website for new Wlan driver. Maybe the new update could solve the problem.
Bye

Network connection drops on MacBook Pro

I have a MacBook Pro 15 “ Unibody OSX 10.5.8 (have not yet upgraded to Snow Leopard) 2.53 GHz Intel Core 2 Duo 4GB Ram purchased in December 2008. This was my first Mac purchase having used only Windows PCs prior to that. My daughter has a nearly identical Macbook Pro purchased for her in July of 2008 which is also running OSX 10.5.8. Everything on my Mac has worked perfectly---and beautifully-- until about one month ago when I started having problems connecting to our home network (Netgear Router, Commcast provided modem). It is important to know that my daughter’s MacBook Pro and my wife’s Dell laptop (Vista) do not and have never experienced the network connection problem I have been experiencing---only my Macbook Pro--- so I assume the fault lies somewhere other than with the router or modem. I lose the internet connection once or twice each day--sometimes when I am in the middle of something and sometimes when I turn my MacBook on from being shut down or from sleep--happens in all three states. After discussing this issue on the phone with several people at Apple tech support (all of whom were very pleasant and patient) it was determined that the internet connection issue could be solved temporarily by dragging the System Configuration Folder from the HD Preference Library to the desktop, then restarting, then clicking on our home network name. Whenever I follow this procedure I am able to connect to the Internet again and everything is fine until another 12 to 24 hours goes by and then I lose the connection again, repeat the fix and so on and so on. Since this problem does not occur more frequently than once or twice a day I have not bothered to take my MacBook to an Apple Store to see if the problem is caused by a hardware issue. I do not have a back up computer for my personal use at home and would rather not take my MacBook in unless until I have exhausted any other options that might exist. Does anyone out there have any suggestions? Any help would be greatly appreciated.

Welcome to the discussions forum Rpma1900.
I can't explain your problem, but since no one has posted any ideas might I suggest the following?
Try turning OFF IPv6 in Network Preferences. IPv6 is a great idea in theory but I've never encountered a network situation in which it's resulted in any performance improvement.
Try giving your MacBook Pro a fixed IP address. Make it numerically higher than any that might be provided by your Netgear router so it won't conflict with them.
Finally, I once experienced this identical problem using a Linksys router, but with a strange twist: my Vista computer would lose connection in much the same manner as your MacBook Pro, while all my Macs would remain happily connected. After exhausting every other imaginable solution, including the above suggestions, I finally removed the Linksys router and installed an AirPort Express. Problem solved.

Network connection drops every 15 mins

Hi all,
i'm loosing network access on my iMac. This has started tonight, I had never had any problem before. My iMac is connected through Ethernet interface to a switch, then access to a router and finally to the modem cable. I have several other computers on this home network, all of them working properly and accessing to Internet without any problem.
Only the iMac is behaving strangely, and only since a few hours.
When the problem occurs, everything seems normal : LEDs are on on the switch, ifconfig -a gives a normal report (interface up, IP address ok within network range (no APIPA), netstat -rn OK), and i have no entry in system. log or whatsoever. But I can't nervertheless access to any Internet site, nor can I even ping my defaut router.
I began to "solve" the problem by rebooting the mac, then found that, when the problem occurs, I can solve it by going to Network preferences, advanced options, TCP/IP tab and press the "renew DHCP lease". Then everything works fine for 15 minutes, and I have to renew this operation.
The strange thing is that I used the iMac this morning and it was working fine. When I switched it on again tonight, the problem appeared .... Nothing changed, execpt one thing (but I can't find any connection) : the World of Warcraft laucher has been updated this morning ! But I can not imagine that this might generate trouble on the TCP/IP stack of Mac OS X !!!!
When the network connection is lost, all traffic is stopped, not only HTTP. If I'm for example playing WoW, I loose the connection to the game servers. Renewing the DHCP lease fixes the problem if done quickly enough.
I know I never had this problem before, as I'm connected to WoW almost every day and could so far play without any problem for (sometimes) hours.
I've seen some posts describing more or less the same behavior, but no answers so far. Surprisingly, many of them reports problems occuring every 15 mins.
Any idea ?
Thanks.
PhC.

Hello,
I've found a workaround : I've switched my TCP/IP config to static IP address and everything is working fine so far.
Hope this helps.
PhC.

Network connectivity drops intermittently

I've got some really weird behavior with my home file server that started early yesterday. It first presented itself with irssi being super slow (occasionally not responded) and I kept getting server disconnects. I poked around journalctl and found this:
pr 15 22:21:01 gaia.haiti systemd[1]: systemd-journald.service watchdog timeout!
Apr 15 22:22:32 gaia.haiti systemd[1]: Starting Trigger Flushing of Journal to Persistent Storage...
Apr 15 22:22:32 gaia.haiti systemd[1]: systemd-journald.service: main process exited, code=killed, status=10/USR1
Apr 15 22:22:32 gaia.haiti systemd[1]: Unit systemd-journald.service entered failed state.
Apr 15 22:22:32 gaia.haiti systemd[1]: Starting Trigger Flushing of Journal to Persistent Storage...
Apr 15 22:22:32 gaia.haiti systemd[1]: Started Trigger Flushing of Journal to Persistent Storage.
Apr 15 22:22:32 gaia.haiti systemd[1]: systemd-journald.service: main process exited, code=killed, status=10/USR1
Apr 15 22:22:32 gaia.haiti systemd[1]: Unit systemd-journald.service entered failed state.
Apr 15 22:22:32 gaia.haiti systemd[1]: Starting Trigger Flushing of Journal to Persistent Storage...
Apr 15 22:22:32 gaia.haiti systemd[1]: systemd-journald.service: main process exited, code=killed, status=10/USR1
Apr 15 22:22:32 gaia.haiti systemd[1]: Unit systemd-journald.service entered failed state.
Apr 15 22:33:52 gaia.haiti systemd-journal[8929]: Forwarding to syslog missed 8 messages.
Apr 15 22:33:53 gaia.haiti systemd-journal[8929]: Journal stopped
Apr 15 22:33:53 gaia.haiti systemd-journal[9057]: Permanent journal is using 1.3G (max allowed 1.3G, trying to leave 11.7M free of 33.9G available → current limit 1.3G).
Apr 15 22:33:53 gaia.haiti systemd-journald[8929]: Received SIGTERM from PID 1 (systemd).
Apr 15 22:33:53 gaia.haiti systemd[1]: Unit systemd-journald.service entered failed state.
Apr 15 22:33:53 gaia.haiti systemd[1]: systemd-journald.service has no holdoff time, scheduling restart.
Apr 15 22:33:53 gaia.haiti systemd[1]: Stopping Journal Service...
Apr 15 22:33:53 gaia.haiti systemd[1]: Starting Journal Service...
Apr 15 22:33:53 gaia.haiti systemd[1]: Started Journal Service.
Apr 15 22:33:53 gaia.haiti systemd-journal[9057]: Journal started
Which looks a little strange but didn't explain the irssi behavior. On a whim I turned up the front fan on the server as I had seen a couple alerts about the disk temp hitting 40C, within a few minutes munin spewed a bunch of alerts, primarily OK alerts around disk latency which is a little strange. That said, I keep getting alerts about eth0 errors being unknown/a high number.
This morning I looked at munin and there are huge gaps in the charts, 1-2 hours which is really strange. Looking in the munin logs I see errors about connecting to the tcp port. Anyone know what's going on? I've got munin configured to use CGI for the graph generation.
While I was typing this I lost network connectivity to the server (ssh/http) for 5-10 minutes, after I got back in I saw the systemd messages above. Scrolling through my buffer I see the following error appeared regularly yesterday:
[1279012.741565] INFO: task nginx:32084 blocked for more than 120 seconds.
[1279012.741616] Not tainted 3.13.7-1-ARCH #1
[1279012.741648] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[1279012.741701] nginx D 00000343 0 32084 32083 0x00000000
[1279012.741706] c0f7fe7c 00200086 c0b4e930 00000343 00000000 c16aca40 2b3cbea6 00048ae4
[1279012.741712] c16aca40 f4c7c2c0 c0faac80 c0faac80 c0f7fe40 00054878 00000000 c0f7ff14
[1279012.741717] 00000000 00000000 c0b4e930 00000000 c0bfe42c c0bfe490 000005a8 000005a8
[1279012.741722] Call Trace:
[1279012.741731] [<c1453443>] schedule+0x23/0x60
[1279012.741736] [<c14537c4>] schedule_preempt_disabled+0x14/0x20
[1279012.741739] [<c1455725>] __mutex_lock_slowpath+0x105/0x330
[1279012.741742] [<c1455960>] mutex_lock+0x10/0x1c
[1279012.741747] [<c1104870>] generic_file_aio_write+0x40/0x90
[1279012.741763] [<c1156467>] do_sync_write+0x57/0x90
[1279012.741767] [<c1156410>] ? do_sync_read+0x90/0x90
[1279012.741770] [<c1156c25>] vfs_write+0x95/0x1c0
[1279012.741773] [<c11572f1>] SyS_write+0x51/0x90
[1279012.741777] [<c145d40d>] sysenter_do_call+0x12/0x28
Looking on google suggests this is related to resource starvation.
Output of free -m:
total used free shared buffers cached
Mem: 3234 3111 123 0 3 63
-/+ buffers/cache: 3044 189
Swap: 2047 1047 1000
I do have 8GB installed but it's i686 (legacy system) and so far my attempts to build a kernel with PAE have failed.
Edit: I stopped subsonic which was occupying about 500M Virtual RAM and munin is updating more reliably.
Edit Edit: Still happened. Installed sysstat and it looks like things are still being blocked. Also shows average memory utilization at 95%
Linux 3.13.7-1-ARCH (gaia.haiti) 04/16/2014 _i686_ (4 CPU)
10:27:33 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15 blocked
10:37:33 AM 1 408 1.63 1.74 2.13 0
10:47:33 AM 1 409 1.28 1.39 1.76 0
10:57:38 AM 0 408 2.11 1.70 1.75 4
11:07:38 AM 0 403 11.43 8.34 5.02 14
11:17:38 AM 0 421 15.65 11.50 7.96 16
11:34:57 AM 1 440 29.46 35.64 25.85 4
11:44:57 AM 0 399 16.61 18.16 20.32 3
Average: 0 413 11.17 11.21 9.26 6
Update: Looks to be directly related to Memory utilization, followed this guide on diagnosing high load and appears the system is swapping a bit. I expected it to handle things a little better since I'm using a SSD (the only hardware change in a few months).
Last edited by Ashex (2014-04-16 10:03:31)

Comcast technician said my Technicolor brand modem I rent from them is the problem.He said that most VPN problems show up due to that brand is not configured correctly for that application. He did suggest that any other brand they offer seems to work ok. Mine is a technicolor wih voice modem too. I have to go to my local Comcast office and see what model modems they have available at the time since they cannot be disturbed by a local phone call. I dont know if I may trade in my brand new Technicolor for another failing modem or just suffer the ever-failing connection. The connection does always reconnect by slows my work sometimes creating too many distractions that lead to not remeining focused on the task at hand........especially when a client needs have to wait until reconnection. I plan to call the Technicolor manufacturer first to see if they have a fix first. Cannot assume anyone at Comcast has done the research.

Unstable Time Capsule - Sporadic Network Connections Drop

I just had a belkin router in, and then I got the time capsule, I replaced the belkin and now no connection (wireless) is persistent. it connects/disconnects sporadically.. Plain ridiculous....any clues?
This is the wifi setup....all wireless here

The Radio Mode that you have chosen.....802.11a --- 802.11b/g.....will only allow an older "a" device to connect to the 5 GHz network.
You might want to consider having this setting at 802.11 "a/n", or 802.11 "n" only. Then faster "n" devices will be able to connect to the 5 GHz network. As it stands, you are forcing any "n" device that you have to try to connect to the "b/g" network. If it connects, it will do so at much lower speeds.
"a" devices will only connect at 54 Mbps (same speed as "g" devices), so I'm not sure what you are hoping to gain in having the 5 GHz network setup so only "a' devices will connect.
Maybe I am missing something. Can you clarify here?

Network Connection Suddenly Drops Several Times Per Day

We have a couple of macs in our office whose network connections drop several times per day. The two main ones are both 1.66 GHz Intel Core Duo Mac Mini's — one running OS 10.4.8 and the other 10.4.9. Our server is a Windows
Server 2003 Pentium 4, 3 GHz computer and we use a Linksys 24 port 10/100 Ethernet switch. On occasion, someone else's mac drop their network connection but it seems to be much more frequent with these two. Our other macs are a mixture of other Mac Mini's, iMacs, G4's, etc. all running either OS 10.4.8 or 10.4.9.
Any ideas??????
Thanks,
Neil Brown
iMac 2 GHz Intel Core 2 Duo Mac OS X (10.4.8)

The network connection is still dropping with switching around. In addition, starting this morning, my network connections as well as another person's are dropping suddenly too. The only pattern I can see with mine so far is it seems if I am away from my computer for a few minutes and come back, my network connection has dropped (i.e. the individual "shares" that I have mounted on my desktop, so I have to go back to Connect to Server, log in and mount those again). Our ethernet switch is new, and we had been experiencing this problem before with our old switch, so that didn't solve the problem.
I'm not sure what to try next. Any suggestions?
Thanks,
Neil
iMac 2 GHz Intel Core 2 Duo Mac OS X (10.4.8)
PowerMac G4

Mac Mini *half* loses all network connections

Cheers folks, new one on me. I have a Mac Mini 2.26Ghz Core 2 Duo. It's running a fully-updated 10.6.8. It's connected via ethernet to an Airport Extreme which is extending an 802.11N network from another Airport Extreme elsewhere which is connected to the router. The network is set with IPv6 *off* and is configured to run over Ethernet normally (this is because a wired-only NAS is connected to the same Airport Extreme as the Mini).
Here's the symptom, and it's an odd one for me: Every couple of days, the entirety of the Mac OS X layer (not the BSD layer) will lose network connectivity. More specifically:
No web browser will work ('Not connected to the Internet').
Home Sharing, served on this Mini, will cease to be visible from elsewhere in the house (AppleTVs lose it).
No internal services can be reached by name, either DNS or BonJour.
The App Store says 'can't connect.'
iTunes will say it can't connect to the ITMS.
This is true on Ethernet *or* on Airport (the Mini usually runs on ethernet alone with AirPort off; bringing up Airport once this has occurred doesn't seem to help anything).
Running the Airport Utility, it sees *no devices* (there are 4 on this network)
BUT!
If I go into the Terminal, I can not only get clear network traffic anywhere I want at the TCP layer, DNS seems to work as well. So the following is true also:
'ping cisco.com' (or any valid DNS name) works fine - resolves DNS, pings.
'traceroute cisco.com' works fine - resolves DNS, traceroutes out across the internet, no problems.
'ping <IP address of NAS>' - works fine.
'dig <name>' - works fine.
pinging the gateway (the router airport) works fine.
Also:
Other Macs in the house (on wired OR wireless, connected to any of the AirPorts including the same one as the Mini) work fine.
Other Macs can see the NAS connected to that same AirPort fine.
iOS devices in the house connected to any AirPort work fine.
netstat -r shows what look to be proper routes - i.e. the default gateway is the router address (10.0.1.1) and the route to 10.0.1.1 is shown to be the MAC address of the router's Ethernet interface (anyway, as I mentioned above, network stuff from the shell works fine<!?!??!
Steps tried:
Turning off ipv6 - nope.
Applying all firmware/software updates (OS X 10.6.8) - nope.
Tried manually setting DNS to Google public DNS servers - nope. Those work fine, and are still set when the network drops out, and then don't work, nor does setting new DNS servers in the Network prefpane.
Logging out/back in - nope.
Restarting the computer: YES. This works, all three times this has happened (all this week). Serious PITA.
I tried going through the system log, but I don't see anything notable that changes or is logged when the network connection drops.
Every time the connection has stopped working, the computer *has* slept at some point since it was last known working, but if I sleep the computer manually, everything seems fine.
.....waaaaaaaah! Help, this one is making me crazy. :-) Thanks. I'm terminal-savvy, and fairly OS X savvy.

I still have this issue. About every one hour - two days the DNS layer will stop working and only a restart will fix it.
Killing mDNSResponder only resolves the issue sometimes and even then for a few seconds.
I have now found and created the following bash script, to see if this will be a more reliable non-restart fix that killing mDNSResponder in the terminal:
#!/bin/bash
#Script to unload and reload mDNS as it is a bit crappy
sudo launchctl unload /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist
echo "mDNS unloaded"
sleep 5
sudo launchctl load /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist
echo "mDNS loaded"
sleep 5
echo "Hopefully you can get on with browsing again"
I saved the above as mdns_reload.command, and then in Terminal ran "chmod u+x mdns_reload.command". This makes the script executable.
The next time the problem occurs I am going to test how good this script is as a resolution.
The second time the problem occurs I am going to try the following, from a different thread from 2011:
I don't know if anyone will be helped by this, but the Macbook problems connecting to the internet are directly related to DNS issues. I discovered this after an upgrade to the OS X Lion preview.
The symptoms are as follows: a macbook (pro, mini, etc) can get an IP address from a DHCP server on any given network, but can not connect to the internet, even though other computers on the same network have no issues. If this sounds familiar, read on.
The problem is not related to 3rd party products, routers, Airport settings, locations or public vs private DNS servers, and you don't need to reset SMC or PRAM.
You will need to use terminal and you DO NOT want to use disk utility to repair permissions.
The most direct way to fix this is to copy the com.apple.mDNSResponder.plist and com.apple.mDNSResponderHelper.plist files from an internet connected Mac into your /System/Library/LaunchDaemons directory.
(You should know that it probably doesn't matter what version of OS X you have or the other Mac has, you just need the files.)
Next you will need to change ownership of the files just copied (ex: chown root:wheel /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist and chown root:wheel /System/Library/LaunchDaemons/com.apple.mDNSResponderHelper.plist)
Then, you will need to set correct permissions (ex: chmod -R 755 /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist and chmod -R 755 /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist)
The last thing you'll want to do is to verify that the ownership of the files copied is set to system (and maybe wheel) using "Get Info." (Conversely, you can use ls -l /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist to verify owner and permissions.)
You should not have to restart to connect immediately to the internet.

Wireless connection drops after bout 5 min - HP all in one C6180

Hi!
I'm having problem with my all in one product - HP all in one C6180. The wireless network connection drops, and the printer becomes unreachable from both web-interface and printjobs/scanningjobs etc...
This problem has existed since I bought this machine..
I've tried several different setups when it comes to WEP/WPA/WPA2 etc..and also different channels on the wireless, but still same problem exist. The printer works perfect for about 5 min, but then drops the connection it seems like. I'm having about 5-6 devices connected to my wireless router (Draytek VGI 2910), and all seems to work perfect together except the C6180.
At this moment I'm running WPA2 for security on my network. I've tested the software both on Win/ Mac, and currently running the Mac-version.
Is there any firmware-update out that could solve my problem, or how else should I manage it to work properly?
Thanks for any help!
/V

There does not appear to be any firmware update on this page. It could be a router issue.
Let's set a static IP address for the printer:
- Print a Network Config Page from the front of the printer. Note the printer's IP address.
- Type that IP address into a browser to reveal the printer's internal settings.
- Choose the Networking tab, then Wireless along the left side, then the IPv4 tab.
- On this screen you want to set a Manual IP. You need to set an IP address outside the range that the router automatically sets (called the DHCP range). If you do not know the range, set a high IP address, like .250
- Use 255.255.255.0 for the subnet (unless you know it is different, if so, use that)
- Enter your router's IP (ends with .1) for the gateway and first DNS. Leave the second one blank.
- Click 'Apply'.
Now, shut down the router and printer, start the router, wait, then start the printer.
After this you may need to redo 'Add a Printer' using the new IP address.
Say thanks by clicking "Kudos" "thumbs up" in the post that helped you.
I am employed by HP

Time Capsule + APE extension connection drop

Hi All,
I have a Time Capsule (Version 7.5) 1TB and an Airport Express (Version 7.4.2) to extend the 2.4 GHz network.
All works fine until either the Time Machine backup starts or a big file is copied over the extended network via the Airport Express to the Time Capsule. Then the network connection drops and the Time Capsule disk disappears from Finder. To recover either the Time Capsule or the Airport Express need to be rebooted.
To me it seems that the connection always drops when the data transfer rate reaches around 400kbps.
Any ideas?

I had this same problem on my brand new 2TB time capsule but seem to have resolved it by reverting the firmware back down to 7.4. Hope this helps.

Updated iTunes to newest version, and once iTunes opened, it crashes immediately. Have tried uninstalling and reinstalling the program numerous times. Also had a hard time getting a network connection over the weekend (I knew my connection was fine)

Updated iTunes to the newest version but have been unable to use it since. Once it opens and tries to connect to the iTunes store it crashes and asks me to close the program and report the problem. In the Windows information center, it tells me to update iTunes to the newest version to fix the problem; when I do and I tell it to repair the problem it goes through the motions, but the program doesn't change, it still doesn't work. I have tried uninstalling and resinstalling the program numerous times from the weekend until now to no avail. After the update was completed, it had a difficult time making a network connection; I knew that the connection was fine, as I was on the internet and receiving e-mail at the same time.

Close your iTunes,
Go to command Prompt -
(Win 7/Vista) - START/ALL PROGRAMS/ACCESSORIES, right mouse click "Command Prompt", choose "Run as Administrator".
(Win XP SP2 & above) - START/ALL PROGRAMS/ACCESSORIES/Command Prompt
In the "Command Prompt" screen, type in
netsh winsock reset
Hit "ENTER" key
Restart your computer.
If you do get a prompt after restart windows to remap LSP, just click NO.
Now launch your iTunes and see if it is working now.
If you are still having these type of problems after trying the winsock reset, refer to this article to identify which software in your system is inserting LSP:
iTunes 10.5 for Windows: May see performance issues and blank iTunes Store
http://support.apple.com/kb/TS4123?viewlocale=en_US

Network connection very slow, lot of drops

Hello!
On my network, there's an ADSL modem; an AirPort Extreme is connected to it and all my computers are connected to that AirPort Extreme.
Initially, I had set the AirPort Extreme as a bridge and the modem was in PPPoE. However, I had weird troubles with that setup (one computer couldn't reach another one, not even ping) so I made the other way around: the modem is now in bridge mode and the AirPort Extreme handles the PPPoE connection.
Since then (at least, I guess), downloading from the Internet or simply browsing is a nightmare. Connections would start at a varying low rate (always less than 30 KB/s, sometimes 5 KB/s) and always slow down until the connection drops completely. For small files, I can hope to download a 1 MB file in 40 minutes; for larger ones, it's hopeless.
I've tried to rule out the AirPort Extreme, connecting one computer directly to the modem. I reset the modem (since it's in bridge mode and it's beyond the subnet made from the AirPort Extreme, how can I reach it from my network?) and enter my ISP data. When all the lights on the modem are fine, it tells me some tests failed; I can't connect to the Internet that way. It looks like the modem lost its ability to connect as PPPoE when I defined it as a bridge (?).
I then tried to rule out the modem. I connected my computer and the ADSL line to the AirPort Extreme (which still had the PPPoE settings); the AirPort Extreme would not connect or reach a DNS (what's the purpose of having PPPoE settings if it can't connect to the Internet without even passing by a modem in bridge mode?).
In short, I can't rule out either the modem nor the AirPort Extreme, because they both can't connect to the Internet separately (the modem could before I inverted which device is in bridge mode). After all my attempts, the only way to get Internet back is to set the modem again as a bridge and use the AirPort Extreme for the PPPoE, which makes the whole problem of a very slow connection (even unusable) that I'm trying to repair. I'm lost at that point.
Any help would be really welcome!

Bob Timmons wrote:
Two possibilities:
1) The modem is not working correctly and should be replaced
If that's the case, then I'm feeling guilty, as it worked before I set it as a bridge.
2) Your log in information has changed due to service provider updates. Contact your provider to verify your account details
It's actually my mother who created that account; I'll ask her further.
my native language isn't English
But, your English is excellent.
Thank you.
Some countries use PPPoA authentication, and not PPPoE. Although they are similar, if your provider really uses PPPoA credentials, then you cannot log on from your Mac or use the AirPort router to provide the log on authorization, since Apple does not support PPPoA.
Well, I tried using PPPoA recently and it wasn't better. Also, the fact that the AirPort is currently the one making the PPPoE authentication seems to definitively indicate it's not PPPoA (thanks to your information that it wouldn't work in that case).
Generally, my opinion would be that things will work better if you use the modem or a modem/router to provide the connection service and run the AirPort in Bridge Mode.....rather than trying to put the modem in Bridge Mode and use the AirPort to provide the connection service.
Yes, I agree. Actually, I had another problem with the previous setup (AirPort as bridge and modem for PPPoE) where, on my LAN with two computers, only one could reach the other one (the connection worked in one direction only); I couldn't even use file sharing, Remote Desktop or even ping (because, even trying from the working sense, the response would often not come back). In this Apple forum, I got the suggestion to exchange which device was in bridge mode and, indeed, now I can communicate from and to all computers. Since I've realised my connection to the Internet is now mostly broken, I should have been satisfied with the previous problem…
I'm hoping to go back to an Internet connection that works, and not get the first issue of computers not being reachable on the LAN. The big trouble here is that all these behaviours I've experienced are weird (am I outside of the logic with my use of the devices?). I'm also noticing that the first problem sounds to have arrived since I replaced my old router by the AirPort Extreme.
If your modem is 4-5 years old, then that might be another reason to consider replacing it. Ask your provider what they would recommend.
Wow, mine is actually way older than that! I don't think we've ever changed it since we had an Internet connection (around 1998). At this time, things were not designed to break too soon, right?
Perhaps it had to break with this duration of use, and it just waited that I change settings to break… Doesn't sound a likely scenario, however.
I'm considering trying with my neighbour's modem (with his connection's settings), with the AirPort in bridge mode. If it works, I'll be almost certain the problem is the modem, I'm right?
Thank you very much for your help so far; things are getting clearer!

B109n-z making my network connection drop

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