/etc/hosts vs DNS & sendmail

Hi All,
I have a question about how /etc/hosts & DNS work on a solaris 9 box.
When I have entries in /etc/hosts that are not in DNS and I run say nslookup the utility will not find the ip. Put if I ping the entry in /etc/hosts it will find it. Basically I have a box with default sendmail and in /etc/hosts I have a entry with mailhost added to it at the end. nslookup does not find the box ping does and sendmail can't send mail to it and I can not verify that it ever worked correctly.
1) what is up with nslookup no seeing /etc/hosts?
2) can sendmail send to hosts per FQDN listed in /etc/hosts & use a DNS server at the same time?
thanks
-im

When I have entries in /etc/hosts that are not in DNS
and I run say nslookup the utility will not find the
ip. Correct. nslookup and /etc/hosts are controlled by /etc/nsswitch.conf.
Files says to search /etc/hosts.
Anything else says to use that name service.
Put if I ping the entry in /etc/hosts it will
find it.If it is in /etc/hosts and /etc/nsswitch.conf says to search /etc/hosts.
and in /etc/hosts I have a entry with mailhost added
to it at the end. nslookup does not find the box ping
does and sendmail can't send mail to it and I can not
verify that it ever worked correctly. Sendmail can be compiled to use or disregard name server lookups in addition to the /etc/nsswitch.conf file.
sendmail -v e-mail_addr, should show you some basic diagnostics.
1) what is up with nslookup no seeing /etc/hosts?That's the way it works.
2) can sendmail send to hosts per FQDN listed in
/etc/hosts & use a DNS server at the same time?sure, see /etc/nsswitch.conf and the sendmail compile time options.
http://www.ilkda.com/sendmail/
alan

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          Status: OK
          Manufacturer: 0xAD00000000000000
        BANK 1/DIMM1:
          Size: 1 GB
          Speed: 667 MHz
          Status: OK
          Manufacturer: 0xAD00000000000000
    SATA
       ST3500630AS Q                         
    USB
       Porsche Mobile for Mac (LaCie)
    Diagnostic reports
       2015-02-06 coreduetd crash
       2015-02-06 iTunes crash
       2015-02-12 AddressBookSourceSync crash
       2015-02-17 coreduetd crash
       2015-02-17 iTunes crash
       2015-03-06 Dock crash
       2015-03-06 Safari hang
       2015-03-06 Spotify hang
    Log
      Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:12 BUG in process suhelperd[176]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
       Mar  7 10:25:47 proc 307: load code signature error 4 for file "garcon"
       Mar  7 10:26:24 BUG in process suhelperd[176]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    Daemons
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       com.adobe.versioncueCS3
       com.microsoft.office.licensing.helper
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       com.adobe.fpsaud
       com.digidesign.fwfamily.helper
    Agents
       com.google.Chrome.framework.service_process~/Library/Application_Support/Google /Chrome
       com.oracle.java.Java-Updater
       com.spotify.webhelper
       com.google.keystone.user.agent
       com.divx.update.agent
       com.divx.dms.agent
    launchd
       /System/Library/LaunchDaemons/com.apple.installer.osmessagetracing.plist
       - com.apple.installer.osmessagetracing
       /Library/LaunchAgents/com.adobe.AAM.Updater-1.0.plist
       - com.adobe.AAM.Startup-1.0
       /Library/LaunchAgents/com.divx.dms.agent.plist
       - com.divx.dms.agent
       /Library/LaunchAgents/com.divx.update.agent.plist
       - com.divx.update.agent
       /Library/LaunchAgents/com.oracle.java.Java-Updater.plist
       - com.oracle.java.Java-Updater
       /Library/LaunchDaemons/com.adobe.fpsaud.plist
       - com.adobe.fpsaud
       /Library/LaunchDaemons/com.adobe.SwitchBoard.plist
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       /Library/LaunchDaemons/com.adobe.versioncueCS3.plist
       - com.adobe.versioncueCS3
       /Library/LaunchDaemons/com.digidesign.fwfamily.helper.plist
       - com.digidesign.fwfamily.helper
       /Library/LaunchDaemons/com.microsoft.office.licensing.helper.plist
       - com.microsoft.office.licensing.helper
       /Library/LaunchDaemons/com.oracle.java.Helper-Tool.plist
       - com.oracle.java.Helper-Tool
       /Library/LaunchDaemons/PACESupport.plist
       - com.paceap.pacesupport
       Library/LaunchAgents/com.google.Chrome.framework.plist
       - com.google.Chrome.framework.service_process~/Library/Application_Support/Google /Chrome
       Library/LaunchAgents/com.google.keystone.agent.plist
       - com.google.keystone.user.agent
       Library/LaunchAgents/com.spotify.webhelper.plist
       - com.spotify.webhelper
    Startup items
       /Library/StartupItems/Digidesign Mbox 2/CheckKextForOs
       /Library/StartupItems/Digidesign Mbox 2/Digidesign Mbox 2
       /Library/StartupItems/Digidesign Mbox 2/getCurrentUser
       /Library/StartupItems/Digidesign Mbox 2/isJaguar
       /Library/StartupItems/Digidesign Mbox 2/Mbox2CS
       /Library/StartupItems/Digidesign Mbox 2/StartupParameters.plist
       /Library/StartupItems/DigidesignLoader/DigidesignLoader
       /Library/StartupItems/DigidesignLoader/StartupParameters.plist
       /Library/StartupItems/MySQLCOM/MySQLCOM
       /Library/StartupItems/MySQLCOM/StartupParameters.plist
       /Library/StartupItems/PACESupport/PACESupport
       /Library/StartupItems/PACESupport/Resources/PACESupport.plist
       /Library/StartupItems/PACESupport/StartupParameters.plist
       /Library/StartupItems/Qmaster/Qmaster
       /Library/StartupItems/Qmaster/StartupParameters.plist
    Bundles
       /System/Library/Extensions/DigiDal.kext
       - com.digidesign.iokit.DigiDal
       /System/Library/Extensions/DigidesignFireWireAudio.kext
       - com.digidesign.fwfamily.driver
       /System/Library/Extensions/DigidesignMbox2.kext
       - com.digidesign.mbox2.driver
       /System/Library/Extensions/DigidesignMbox2Boot.kext
       - com.digidesign.mbox2.boot.driver
       /System/Library/Extensions/DigiIO.kext
       - com.digidesign.iokit.DigiIO
       /System/Library/Extensions/JMicronATA.kext
       - com.jmicron.JMicronATA
       /System/Library/Extensions/PACESupportFamily.kext
       - com.paceap.kext.pacesupport.master
       /Library/Audio/Plug-Ins/HAL/Digidesign CoreAudio.plugin
       - com.digidesign.digidesign.DigiCoreAudioPlugIn
       /Library/Internet Plug-Ins/AdobePDFViewer.plugin
       - com.adobe.acrobat.pdfviewer
       /Library/Internet Plug-Ins/AdobePDFViewerNPAPI.plugin
       - com.adobe.acrobat.pdfviewerNPAPI
       /Library/Internet Plug-Ins/DirectorShockwave.plugin
       - com.adobe.director.shockwave.pluginshim
       /Library/Internet Plug-Ins/DivX Web Player.plugin
       - com.divx.DivXWebPlayer
       /Library/Internet Plug-Ins/Google Earth Web Plug-in.plugin
       - com.Google.GoogleEarthPlugin.plugin
       /Library/Internet Plug-Ins/JavaAppletPlugin.plugin
       - com.oracle.java.JavaAppletPlugin
       /Library/Internet Plug-Ins/nplastpass.plugin
       - com.lastpass.nplastpass
       /Library/Internet Plug-Ins/OVSHelper.plugin
       - com.divx.OVSHelper
       /Library/Internet Plug-Ins/SharePointBrowserPlugin.plugin
       - com.microsoft.sharepoint.browserplugin
       /Library/Internet Plug-Ins/SharePointWebKitPlugin.webplugin
       - com.microsoft.sharepoint.webkitplugin
       /Library/Internet Plug-Ins/Silverlight.plugin
       - com.microsoft.SilverlightPlugin
       /Library/PreferencePanes/Flash Player.prefPane
       - com.adobe.flashplayerpreferences
       /Library/PreferencePanes/JavaControlPanel.prefPane
       - com.oracle.java.JavaControlPanel
       /Library/PreferencePanes/VersionCueCS3.prefPane
       - com.adobe.versioncueCS3.VCPrefPane
       /Library/QuickTime/FLV.component
       - com.macromedia.FLVExporter
       /Library/QuickTime/FLV.component/Contents/Resources
       - com.macromedia.FLVExporter
       /Library/ScriptingAdditions/Adobe Unit Types.osax
       - N/A
       Library/Address Book Plug-Ins/SkypeABDialer.bundle
       - com.skype.skypeabdialer
       Library/Address Book Plug-Ins/SkypeABSMS.bundle
       - com.skype.skypeabsms
       Library/Caches/com.apple.Safari/Extensions/LastPass.safariextension
       - com.lastpass.lpsafariextension
       Library/Internet Plug-Ins/BrowserPlus_2.9.8.plugin
       - com.yahoo.browserplus
       Library/iTunes/iTunes Plug-ins/AudioScrobbler.bundle
       - N/A
       Library/PreferencePanes/BrowserPlusPrefs.prefPane
       - com.yahoo.browserplus.prefpane
       Library/PreferencePanes/Growl.prefPane
       - com.growl.prefpanel
       Library/Widgets/Tumblet.wdgt
       - com.tumblr.tumblet
    Apps
        /Applications/Dropbox.app
    Contents of /etc/hosts
       127.0.0.1 192.150.14.69
       127.0.0.1 192.150.18.101
       127.0.0.1 192.150.18.108
       127.0.0.1 192.150.22.40
       127.0.0.1 192.150.8.100
       127.0.0.1 192.150.8.118
       127.0.0.1 209-34-83-73.ood.opsource.net
       127.0.0.1 3dns-1.adobe.com
       127.0.0.1 3dns-2.adobe.com
       127.0.0.1 3dns-2.adobe.com
       127.0.0.1 3dns-3.adobe.com
       127.0.0.1 3dns-3.adobe.com
       127.0.0.1 3dns-4.adobe.com
       127.0.0.1 3dns.adobe.com
       127.0.0.1 activate-sea.adobe.com
       127.0.0.1 activate-sjc0.adobe.com
       127.0.0.1 activate.adobe.com
       127.0.0.1 activate.wip.adobe.com
       127.0.0.1 activate.wip1.adobe.com
       127.0.0.1 activate.wip2.adobe.com
       127.0.0.1 activate.wip3.adobe.com
       127.0.0.1 activate.wip3.adobe.com
       127.0.0.1 activate.wip4.adobe.com
       127.0.0.1 adobe-dns-1.adobe.com
       127.0.0.1 adobe-dns-2.adobe.com
       ...and 79 more line(s)
    Contents of /System/Library/LaunchDaemons/com.apple.installer.osmessagetracing.plist (XML  document text)
       <?xml version="1.0" encoding="UTF-8"?>
       <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
       <plist version="1.0">
       <dict>
        <key>Label</key>
        <string>com.apple.installer.osmessagetracing</string>
        <key>LaunchOnlyOnce</key>
        <true/>
        <key>ProgramArguments</key>
        <array>
        <string>/System/Library/PrivateFrameworks/OSInstaller.framework/Resources/OSMes sageTracer</string>
        </array>
        <key>UserName</key>
        <string>root</string>
        <key>GroupName</key>
        <string>wheel</string>
        <key>WatchPaths</key>
        <array>
        <string>/var/db/.AppleDiagnosticsSetupDone</string>
        </array>
       </dict>
       </plist>
    Global login items
       /Library/Application Support/Lexmark/X1100 Series Scanner.bundle/Contents/SharedSupport/X1100 Series Button Monitor.app
       /Applications/Epson Software/Event Manager.app/Contents/Resources/Assistants/Event Manager/EEventManager.app
    Font issues: 15
    Listeners
       launchd: printer
       launchd: printer
       cupsd: ipp
    User login items
       iAntiVirus
       - missing value
       Caffeine
       - /Applications/Caffeine.app
       Dropbox
       - /Applications/Dropbox.app
       X1100 Series Button Monitor
       - /Library/Application Support/Lexmark/X1100 Series Scanner.bundle/Contents/SharedSupport/X1100 Series Button Monitor.app
       EEventManager
       - /Applications/Epson Software/Event Manager.app/Contents/Resources/Assistants/Event Manager/EEventManager.app
    Safari extensions
       LastPass
    Restricted files: 10398
    Elapsed time (s): 496

  • Blocking Ad servers via etc/host file not working

    In Snow Leopard I add a list of ad servers and direct them to 127.0.0.1 via the /ect/host file.
    I've configured the host file on my mac mini server and it doesn't work.
    i just want to block ads when using browsers ON the Mini.
    How can I achieve this?

    Yeah; that's an old-time Windows and Unix hack.
    There are ad-blocking extensions for all major web browsers, and those are easier to manage and maintain.
    Off the top, I'd have to check the search order to see if I was getting a response from remote DNS or from /etc/hosts here.
    If you're running a Mac OS X Server box, you're hopefully also running DNS services, and if you're running DNS services, then that's going to be where this hackery gets implemented. Add bogus zones. And if DNS gets an answer from its cache, I wouldn't tend to expect it to go read /etc/hosts (for performance reasons), for that matter.
    There may well be an ad-blocking DNS server around you can forward queries to, too; I haven't looked for that.
    If you make changes to your local /etc/hosts setup, try issuing the following to clear the cache:
    dnscacheutil -flushcache
    I'd recommend installing an ad-blocker. /etc/hosts is an old-school approach and can end up causing weirdnesses on errors, particularly if your box is (also) a DNS server for your LAN. (Also realize that Apple isn't documenting the /etc/hosts file in the Mac OS X Server 10.6 networking manual.)

  • /etc/hosts Prank Gone Wrong, need help restoring files to original

    Some friends were messing around on my computer and playing a joke on me
    using the sudo pico /etc/hosts command they were able to send me from sites I wanted to visit, like facebook, to sites I didnt want to visit..
    what they wrote was:
    67.55.108.167 facebook.com
    67.55.108.167 www.facebook.com
    I have since deleted it but the every time I go to facebook from another sight I am still redirected. The odd part is that I can go to facebook, but only after ive been redirected. What I mean is, I try to go to facebook, get redirected, then try to go to facebook right away. If I do that it works fine. Also Safari is the only internet browser that is effected. Opera and Firefox are both un effected. I tried uninstalling and reinstalling safari as well as using the same command as they did, but in reverse. Still no luck. Any suggestion? Unfortunately they didnt back up the /etc/hosts before they edited it

    You might also want to flush your DNS cache
    dscacheutil -flushcache
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    Look in System Preferences -> Accounts to see if your friends added any new admin accounts or granted an existing account admin access.
    If they know how to create ssh-keygen keys, they could have deposited a key in your /private/var/root/.ssh/authorized_keys2 file.
    There are any number of additional tricks they could have done, if they had admin access. I'm just scratching the surface.
    If you do trust these friends, then most likely they just played with /etc/hosts. If they are the kind of friends that get malicious, I would consider the "nuke and pave" reinstall.

  • /etc/hosts Private Host Name Fully Qualified Domain Name does it matter?

    During installation of 11gR1 on Windows 2003 the examples in the installation guide show adding the Private IP and host name to /etc/hosts
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    10.0.0.1 racnode1
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    Later when installing the Clusterware it then expects to see the FQDN, racnode1.mycompany.com, of course you can modify this and remove the domain name and continue. OR go back and add the FQDN in /etc/hosts
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    10.0.0.1 racnode1 racnode1.mycompany.com
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    If it's a problem, the assistent will tell you :-)
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    Best Regards.
    Edited by: 869578 on 2013. 2. 27 오후 9:34

    Hi Friend,
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    Thanks
    LaserSoft

  • Make nslookup read /etc/hosts file

    Dear,
    OS: OUL5x64
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    Address:     10.0.1.1#53
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    Name:     nu.nl
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  • Etc/hosts confusion

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    Cbl wrote:
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    will it cause any problem in hosting the software ??
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    will that cause any problem in hosting ???
    i am doing it for my practice purposes.
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    My Mac Pro, OSX 10.5.8, is ignoring entries in the /etc/hosts/ file. I have been all over the net and not found the definitive solution to this for 10.5.8
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