Currently I'm in troubleshooting a web communication problem and I say web because a user tries to web browser unsuccessfully an HP multifuntional administration page that it is located in a remote branch that is connected to the main office using an ISP MPLS where the user is. Here comes the rare part, trying to web brower the HP multifuntional administration page locally it works! either in the same network segment or in a different network segment through local routing.
We already verify network layer connectivity and is fine, I mean, point to point communication is settup a ping from user pc to the HP multifuntional device is successful and a telnet using port 80 from user pc to the HP multifuntional device IP address shows that is open port 80.
The matter here is when graphic data is requested from a external place of that branch does not work. We have two web services whitin that branch and neither one works from outside.
We have another branch in the same scenario but it works this is the cause I suspect from the ISP MPLS to the affected branch they may be are filtering something but...
What you say???
Next the complete comunication from when user web browser an HP multifuntional administration page in the branch where it actually works
Now the problematic case
This question is marked "community wiki".
asked 19 May '12, 15:40
All the fully-sized segments are missing?! This just looks to me like just another MTU problem and not some really rare case. I'd guess firewall blocks ICMP fragmentation needed but CF bit set messages so they don't appear in the trace.
Check your MTU at the links and compare with advertised MSS, if that doesn't solve your problem please comment again.
answered 20 May '12, 11:00