our customer has got a cisco3745 which seems to be blocking hotmail.com.
when it is removed from the network it works fine. When we put a sniffer we can see that the DNS gives the client the IP address and the host sends query to the hotmail site. But after that we see an ICMP message Type3 and Code 1.coming back to the host. Apart from this site everything works fine. It is running 12.2(13)T1. Config is as follows. Any ideas wht might causing this?
Current configuration : 1120 bytes
! Last configuration change at 17:45:12 UTC Thu Feb 13 2003
! NVRAM config last updated at 17:56:11 UTC Thu Feb 13 2003
Type 3 is destination unreachable. What is sending this back to the client? This router? What is the IP address the client is getting from the DNS? Can you trace to this from this router? If not where does it die? Have you checked this router as well?
This message is sourced by the Fast Ethernet Interface of the router. The client is getting 18.104.22.168 from the DNS for Hotmail. Following are the tarceroute from the PC. I have asked to get it from router.
I see no reason, based on your config, that this router would be tossing this or generating the ICMP message. Can you check 10.0.230.20, where you're default route is pointed, to ensure that this router is not the culprit. A trace from the router would be great help.
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