Network traffic is getting conditionally blocked

satya - Monday, January 23, 2012 1:51:05 PM

Network traffic is getting conditionally blocked

Network traffic is getting conditionally blocked

Search for: Network traffic is getting conditionally blocked

satya - Monday, January 23, 2012 1:53:36 PM

symptoms


occasionally ping request times out
  about every 5 minutes
especially during posts
clears up after 5 to 10 minutes
ping succeeds if attempted from a different machine
  even though a route leg is blocked on the failing ping
ping from a specific machine seems to be blocked

satya - Monday, January 23, 2012 1:54:36 PM

Theory

may be windows server firewall on the target machine is programmed to stop denial of service attacks and may wrongly interpreting the traffic and hence block the ip temporarily...

satya - Monday, January 23, 2012 1:55:23 PM

block packets rate limiting denial of service

block packets rate limiting denial of service

Search for: block packets rate limiting denial of service

satya - Monday, January 23, 2012 1:56:49 PM

windows 2008 server rate limiting ip traffic

windows 2008 server rate limiting ip traffic

Search for: windows 2008 server rate limiting ip traffic

satya - Monday, January 23, 2012 2:07:13 PM

few useful commands


ipconfig /renew
  will get a new dynamic ip address

ipconfig /flushdns
  flushes dns entries

tracert target-computer-name
  gives the route and the internal ips

ping target-computer-name
  ping and see if the ip is reponsive

satya - Monday, January 23, 2012 2:21:33 PM

Error:The terminal server received large number of incomplete connections.

The terminal server received large number of incomplete connections. The system may be under attack.

satya - Monday, January 23, 2012 2:21:54 PM

The terminal server received large number of incomplete connections

The terminal server received large number of incomplete connections

Search for: The terminal server received large number of incomplete connections

satya - Monday, January 23, 2012 2:29:54 PM

The ICS_IPV6 failed to configure IPv6 stack

The ICS_IPV6 failed to configure IPv6 stack

Search for: The ICS_IPV6 failed to configure IPv6 stack

satya - Monday, January 23, 2012 2:33:48 PM

do I need to disable ipv6?

do I need to disable ipv6?

satya - Monday, January 23, 2012 2:46:03 PM

what can you do with microsoft network monitor?

what can you do with microsoft network monitor?

Search for: what can you do with microsoft network monitor?

satya - Monday, January 23, 2012 2:49:50 PM

microsoft reliability and performance monitor

microsoft reliability and performance monitor

Search for: microsoft reliability and performance monitor

satya - Tuesday, January 24, 2012 10:11:35 AM

ms network monitor: how can I see what packets are rejected and why?

ms network monitor: how can I see what packets are rejected and why?

Search for: ms network monitor: how can I see what packets are rejected and why?

satya - Tuesday, January 24, 2012 10:18:10 AM

keywords


winsocklistenbacklog
maxuserport
tcptimedwaitdelay

satya - Tuesday, January 24, 2012 10:19:42 AM

This seems promising read: debugging with packet capture

This seems promising read: debugging with packet capture

satya - Tuesday, January 24, 2012 10:23:55 AM

Review of microsoft network monitoring tool:tech republic/Justin James

Review of microsoft network monitoring tool:tech republic/Justin James

satya - Wednesday, January 25, 2012 1:37:59 PM

How do I know the local ip address of a machine


use ipconfig

satya - Wednesday, January 25, 2012 1:38:44 PM

what do I want to capture


traffic from a specific ip
only http
only post

satya - Wednesday, January 25, 2012 2:13:20 PM

windows firewall log file

windows firewall log file

Search for: windows firewall log file

satya - Wednesday, January 25, 2012 2:22:46 PM

here is how to configure windows firewall logging

here is how to configure windows firewall logging

satya - Wednesday, January 25, 2012 2:24:04 PM

where is the firewall


C:\Windows\System32\LogFiles\Firewall\pfirewall.log

satya - Wednesday, March 28, 2012 11:38:12 AM

This may be linked to the verizon wireless card as well

This may be linked to the verizon wireless card as well

Apparently verizon servers are doing something funky and may need resetting once in a while by removing and reinserting the sim card!!!

I have done it this morning and so far so good. I will post an update.

satya - Thu Mar 29 2012 14:31:22 GMT-0400 (Eastern Daylight Time)

Another weird behavior

this seem to happen with ie mainly. Chrome seem to work fine. it happens on my verzion card. It happens at home on wifi. is it tied to my PC?? some virus may be?? it doesn't happen with Deepak who is using chrome on his mac!!

On my laptop it doesnt happen with chrome? what gives? in fact when it locks up on ie, ping fails as well. But it seem to work on chrome and when it works on chrome ping seem to clear itself as well!!

I am entirely baffled!!