Internet stops for no apparent reason.

Question

My mac mini has been in use since about 2009 with no issues.  It runs 10.7.5 and has 2Gb RAM. It is connected to my airport base station via a 16 port gigabit switch (I haven't yet tried wifi to see if I get the same problem).
The problem started about a week ago.  What happens is that while browsing the internet using firefox or safari, pages suddenly fail to load.
This can include watching catch-up TV - it suddenly stops playing and then I find that no other web pages will load in either browser.  A re-boot solves the problem for a while.
When the problem occurs, I am still able to browse web pages from other computers or iPhone etc. so I don't believe it is anything to do with my ADSL connection, modem or router.  Also when the problem occurs, my computer is still able to download mail from the internet into Mail and view my IP-cam on my LAN (to my recording software - not yet tried opening it in safari but I suspect it won't work).  But this all proves that the MAC MINI still has connection to the intent via its ethernet connection but it just can't load web pages.
I have checked that it is not a DNS issue by trying to open a web page by its IP address, this failed.  I will try pinging webpages and their corresponding IP address to see what happens.
I opened iStat and when there is a problem, most of the RAM is in use, the CPU has a high load and this is being used by an app called "web filter…" (couldn't see the full name because the window was too small to show it all).  After a re-boot, CPU and memory usage returns to normal levels and the "web filter…" app is gone.  I tried a spotlight search for web filter but came up blank.  I have taken a screen shot of activity monitor while everything is OK and will do another the next time I get this issue.
I hope someone can shed some light on this.
Thanks very much
Grommett

Answer 1

Hi Linc
The machine has been fine for over 24 hours until just now.  Web pages stopped loading so I ran your test.  I hope you can find the answer somewhere in this!...
Many thanks
Grommett
Start time: 20:35:05 12/07/14
Model Identifier: Macmini2,1
Memory: 2 GB
System Version: Mac OS X 10.7.5 (11G63)
Kernel Version: Darwin 11.4.2
64-bit Kernel and Extensions: No
Time since boot: 1 day1:49
Admin access: No
Memory
  BANK 0/DIMM0:
  Size: 1 GB
  Speed: 667 MHz
  Status: OK
  Manufacturer: 0x2C00000000000000
  BANK 1/DIMM1:
  Size: 1 GB
  Speed: 667 MHz
  Status: OK
  Manufacturer: 0x2C00000000000000
SATA
  ST1000LM024 HN-M101MBB
USB
  Backup+ Desk (Seagate LLC)
Diagnostic reports
  2014-12-06 AppleIDAuthAgent crash
  2014-12-06 PluginProcess crash
  2014-12-06 WebProcess crash
  2014-12-06 iTunes crash x2
  2014-12-06 xeoma crash x20
Log
  Dec 6 10:41:42 com.apple.mdworker.pool.0: Throttling respawn: Will start in 3 seconds
  Dec 6 14:15:30 com.apple.AirPortBaseStationAgent: Throttling respawn: Will start in 3 seconds
  Dec 6 18:21:29 com.apple.AirPortBaseStationAgent: Throttling respawn: Will start in 2 seconds
kexts
  e.iokit.IOACPIFamily (1.4)
  e.iokit.IOPCIFamily (2.7)
  e.driver.AppleACPIPlatform (1.5)
  e.driver.AppleKeyStore (28.18)
  e.iokit.IOStorageFamily (1.7.2)
  e.driver.DiskImages (331.7)
e.driver.AppleIntelCPUPowerManagement (195.0.0)
  e.security.TMSafetyNet (8)
  e.kext.AppleMatch (1.0.0d1)
  e.security.sandbox (177.11)
  e.security.quarantine (1.4)
  e.nke.applicationfirewall (3.2.30)
e.driver.AppleIntelCPUPowerManagementClient (195.0.0)
  e.driver.AppleAPIC (1.6)
  e.iokit.IOSMBusFamily (1.1)
  e.driver.AppleACPIEC (1.5)
  e.driver.AppleSMBIOS (1.9)
  e.iokit.IOHIDFamily (1.7.1)
  e.driver.AppleACPIButtons (1.5)
  e.driver.AppleRTC (1.5)
  e.driver.AppleEFIRuntime (1.6.1)
  e.driver.AppleEFINVRAM (1.6.1)
  e.iokit.IOUSBFamily (5.1.0)
  e.driver.AppleUSBUHCI (5.1.0)
  e.driver.AppleUSBEHCI (5.1.0)
  e.driver.AppleHPET (1.7)
  e.iokit.IONetworkingFamily (2.1)
  e.iokit.AppleYukon2 (3.2.2b1)
  e.iokit.IOFireWireFamily (4.4.8)
  e.driver.AppleFWOHCI (4.9.0)
  e.iokit.IOAHCIFamily (2.0.8)
  e.driver.AppleAHCIPort (2.3.1)
  e.iokit.IOUSBUserClient (5.0.0)
  e.driver.AppleUSBHub (5.1.0)
  e.iokit.IOATAFamily (2.5.1)
  e.driver.AppleIntelPIIXATA (2.5.1)
  e.iokit.IOAHCIBlockStorage (2.1.0)
e.iokit.IOSCSIArchitectureModelFamily (3.2.1)
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  e.iokit.IOCDStorageFamily (1.7.1)
  e.iokit.IODVDStorageFamily (1.7.1)
  e.iokit.IOBDStorageFamily (1.7)
e.iokit.IOSCSIMultimediaCommandsDevice (3.2.1)
  e.BootCache (33)
e.AppleFSCompression.AppleFSCompressionTypeZlib (1.0.0d1)
e.AppleFSCompression.AppleFSCompressionTypeDataless (1.0.0d1)
  e.driver.AppleUSBComposite (5.0.0)
  e.iokit.IOUSBAttachedSCSI (1.0.2)
  e.iokit.IOSCSIBlockCommandsDevice (3.2.1)
  e.iokit.IOUSBHIDDriver (5.0.0)
  e.driver.AppleIRController (312)
  e.iokit.IOBluetoothFamily (4.0.8f17)
e.driver.AppleUSBBluetoothHCIController (4.0.8f17)
e.driver.CSRUSBBluetoothHCIController (4.0.8f17)
  e.driver.IOPlatformPluginFamily (5.1.1d6)
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  e.driver.AppleSMC (3.1.3d10)
  e.driver.ACPI_SMC_PlatformPlugin (5.0.0d8)
  e.driver.AppleSMBusController (1.0.10d0)
  e.driver.AppleMCCSControl (1.0.33)
  e.driver.AppleUpstreamUserClient (3.5.9)
  e.iokit.IOHDAFamily (2.2.5a5)
  e.driver.AppleHDAController (2.2.5a5)
  e.driver.AppleLPC (1.6.0)
  e.iokit.IOFireWireIP (2.2.5)
  e.iokit.IO80211Family (420.3)
  e.driver.AirPort.Atheros21 (431.14.10)
e.driver.AppleIntelIntegratedFramebuffer (7.0.4)
  e.driver.AppleGraphicsControl (3.1.33)
  e.driver.ApplePolicyControl (3.1.33)
  e.kext.OSvKernDSPLib (1.3)
  e.iokit.IOAudioFamily (1.8.6fc18)
  osiaSW.AudioSupport (2.3.6)
  e.driver.AudioIPCDriver (1.2.3)
  e.Dont_Steal_Mac_OS_X (7.0.0)
  e.iokit.IOSerialFamily (10.0.5)
  e.iokit.IOBluetoothSerialManager (4.0.8f17)
  e.iokit.IOSurface (80.0.2)
  e.iokit.IOUserEthernet (1.0.0d1)
  e.driver.DspFuncLib (2.2.5a5)
  e.driver.AppleHDA (2.2.5a5)
  e.driver.AppleIntelGMA950 (7.0.4)
  e.driver.AudioAUUC (1.59)
  e.kext.triggers (1.0)
  e.filesystems.autofs (3.0)
  re.kext.vmx86 (2.0.0)
  re.kext.vmci (2.0.0)
  re.kext.vmioplug (2.0.0)
  re.kext.vmnet (2.0.0)
  e.driver.IOBluetoothHIDDriver (4.0.8f17)
  e.driver.AppleMultitouchDriver (231.4)
  e.driver.AppleBluetoothMultitouch (70.12)
  e.driver.AppleHIDKeyboard (160.7)
  e.driver.AppleBluetoothHIDKeyboard (160.7)
  e.nke.webcontentfilter (3.0)
  e.filesystems.smbfs (1.7.2)
Agents
  com.apple.AirPortBaseStationAgent
  com.nero.HSMMonitor
  com.google.keystone.user.agent
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.UUID
Startup items
/Library/StartupItems/AGMacFSWatcher/AGMacFSWatcher
/Library/StartupItems/AGMacFSWatcher/StartupParameters.plist
/Library/StartupItems/IntegoCommon/IntegoCommon
/Library/StartupItems/IntegoCommon/StartupParameters.plist
/Library/StartupItems/IntegoCommon/TaskManagerDaemon
/Library/StartupItems/IntegoCommon/TM_Notifier.app/Contents/Info.plist
/Library/StartupItems/IntegoCommon/TM_Notifier.app/Contents/MacOS/TM_Notifier
Bundles
/Library/Audio/Plug-Ins/Components/A52Codec.component
  - com.shepmater.A52Codec
  /Library/Internet Plug-Ins/Disabled Plug-Ins/Windows Media Plugin
  - com.microsoft.WMP.defaultplugin
  /Library/Internet Plug-Ins/Disabled Plug-Ins/Windows Media Plugin/Contents/Resources/English.lproj
  - N/A
  /Library/Internet Plug-Ins/DivXBrowserPlugin.plugin
  - com.divx.DivXBrowserPlugin
  /Library/Internet Plug-Ins/DRM Plugin.bundle
  - com.microsoft.DRMPlugin
  /Library/Internet Plug-Ins/Flip4Mac WMV Plugin.plugin
  - net.telestream.wmv.plugin
  /Library/Internet Plug-Ins/JavaAppletPlugin.plugin
  - com.apple.java.JavaAppletPlugin
  /Library/Internet Plug-Ins/Silverlight.plugin
  - com.microsoft.SilverlightPlugin
/Library/PreferencePanes/DivX.prefPane
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  /Library/PreferencePanes/Flash Player.prefPane
  - com.adobe.flashplayerpreferences
  /Library/PreferencePanes/Flip4Mac WMV.prefPane
  - net.telestream.wmv.prefpane
/Library/PreferencePanes/NetUpdate.prefPane
  - com.intego.preference.netupdate
/Library/PreferencePanes/Perian.prefPane
  - org.perian.PerianPane
/Library/QuickTime/AC3MovieImport.component
  - com.cod3r.ac3movieimport
  /Library/QuickTime/DivX Decoder.component
  - com.DivXInc.DivXDecoder
  /Library/QuickTime/DivX Decoder.component/Contents/Resources
  - com.DivXInc.DivXDecoder
  /Library/QuickTime/DivX Encoder.component
  - com.DivXInc.DivXCodec
  /Library/QuickTime/Flip4Mac WMV Advanced.component
  - net.telestream.wmv.advanced
  /Library/QuickTime/Flip4Mac WMV Export.component
  - net.telestream.wmv.export
  /Library/QuickTime/Flip4Mac WMV Import.component
  - net.telestream.wmv.import
  /Library/QuickTime/Perian.component
  - org.perian.Perian
  /Library/ScriptingAdditions/Adobe Unit Types.osax
  - N/A
  /Library/Spotlight/iMovie.mdimporter
  - com.apple.iMovieMDImporter
  /Library/Widgets/Intego Status.wdgt
  - com.intego.widget
  /Library/Widgets/NetUpdate.wdgt
  - com.intego.widget.netupdate
  Library/Internet Plug-Ins/Google Earth Web Plug-in.plugin
- com.Google.GoogleEarthPlugin.plugin
  Library/Internet Plug-Ins/RealPlayer Plugin.plugin
  - com.RealNetworks.RealPlayerPlugin
  Library/Widgets/BluetoothTexter.wdgt
- com.happymakinggames.widget.bluetoothtexter
  Library/Widgets/Chrysalis.wdgt
- com.reflectivelayer.widget.chrysalis
  Library/Widgets/iStat pro 21-55-17-604.wdgt
  - com.iSlayer.iStatpro4.widget
  Library/Widgets/iStat pro.wdgt
  - com.iSlayer.iStatpro4.widget
  Library/Widgets/Sudoku.wdgt
  - com.bdeboer.widget.sudoku
  Library/Widgets/TideApp.wdgt
  - com.atlantistech.widget.tideapp
  Library/Widgets/Tides.wdgt
  - com.hahn.widget.tides
dylibs
  /usr/lib/libbz2.1.0.3.dylib
  /usr/lib/libgimpprint.7.dylib
  /usr/lib/libgutenprint.2.0.3.dylib
/usr/lib/libPrintServiceQuota.1.dylib
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Contents of /System/Library/LaunchAgents/com.apple.screensharing.MessagesAgent.plist (checksum 4254080775)
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<key>com.apple.screensharing.MessagesAgent</key>
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  <key>RunAtLoad</key>
  <false/>
  </dict>
  </plist>
Contents of /System/Library/LaunchAgents/org.x.startx.plist (checksum 355348819)
  <?xml version="1.0" encoding="UTF-8"?>
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  <dict>
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  <key>ServiceIPC</key>
  <true/>
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Contents of /System/Library/LaunchDaemons/com.apple.xprotectupdater.plist (checksum 3591382872)
  <?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">
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  <dict>
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<string>com.apple.xprotectupdater</string>
  <key>ProgramArguments</key>
  <array>
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  <key>RunAtLoad</key>
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  <key>StartCalendarInterval</key>
  <dict>
  <key>Hour</key>
  <integer>22</integer>
  <key>Minute</key>
  <integer>19</integer>
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Contents of /Library/LaunchDaemons/com.intego.VirusBarrier.daemon.plist (checksum 430929910)
  <?xml version="1.0" encoding="UTF-8"?>
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<string>com.intego.VirusBarrier.daemon</string>
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  <array>
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  <key>RunAtLoad</key>
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Contents of /Library/LaunchDaemons/com.intego.VirusBarrier.logger.daemon.plist (checksum 911422826)
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Contents of /Library/LaunchDaemons/com.intego.VirusBarrier.scanner.daemon.plist (checksum 2106093038)
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  <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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  <array>
<string>/Library/Intego/virusbarrier.bundle/Contents/Resources/virusbarriers</st ring>
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  <key>RunAtLoad</key>
  <true/>
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Contents of /Library/LaunchDaemons/com.intego.task.manager.daemon.plist (checksum 4102722290)
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<string>com.intego.task.manager.daemon</string>
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  <key>OnDemand</key>
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  <key>RunAtLoad</key>
  <true/>
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Contents of /Library/LaunchDaemons/com.vmware.launchd.vmware.plist (checksum 1467462916)
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  <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN"
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  <plist version="1.0">
  <dict>
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<string>com.vmware.launchd.vmware</string>
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  <array>
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<string>--start</string>
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Contents of Library/LaunchAgents/com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.UUID. plist (checksum 1312073118)
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  <dict>
  <key>Label</key>
<string>com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.UUID</string>
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Contents of Library/LaunchAgents/com.google.keystone.agent.plist (checksum 3876858404)
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  <string>-runMode</string>
  <string>ifneeded</string>
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  <key>RunAtLoad</key>
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  <key>StartInterval</key>
  <integer>3523</integer>
  <key>StandardErrorPath</key>
  <string>/dev/null</string>
  <key>StandardOutPath</key>
  <string>/dev/null</string>
  </dict>
  </plist>
Contents of Library/LaunchAgents/com.nero.HSMMonitor.plist (checksum 3334467695)
  <?xml version="1.0" encoding="UTF-8"?>
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  <dict>
  <key>Label</key>
<string>com.nero.HSMMonitor</string>
  <key>ProgramArguments</key>
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  <string>-runMode</string>
  <string>autoLaunched</string>
  </array>
  <key>RunAtLoad</key>
  <true/>
  </dict>
  </plist>
Font issues: 63
Bad plists
Library/Preferences/ByHost/com.apple.DotMacSync.001ff346e9fa.plist
Library/Preferences/ByHost/com.apple.iWork.001ff346e9fa.plist
Library/Preferences/ByHost/com.apple.PrefPane.Network.001ff346e9fa.plist
Library/Preferences/ByHost/com.apple.QuickTime.001ff346e9fa.plist
Library/Preferences/ByHost/com.apple.screensaver.Nature Patterns.001ff346e9fa.plist
Library/Preferences/ByHost/com.apple.screensaver.slideshow.001ff346e9fa.plist
Library/Preferences/com.solidstatenetworks.awkhost.plist
Library/Preferences/com.solidstatenetworks.host.plist
Parental Controls: On
User login items
  DiskWarriorStarter
- /Applications/Utilities/DiskWarrior.app/Contents/MacOS/DiskWarriorStarter.app
  iTunes
  - /Applications/iTunes.app
  OpenDNS Updater
  - /Users/USER/Applications/OpenDNS Updater.app
  xeoma
  - /Applications/xeoma.app
Widgets
  iStat pro
  Tides
Restricted files: 242
Lockfiles: 3
Elapsed time (s): 190