Network troubleshooting, any experts?

[Jeff Vian]

gforte wrote:

> With all (un)due respect, your ISP is probably full of crap.  Your 
> tcpdumps
> indicate that your UDP connections to the DNS servers are getting 
> through,
> at the least.  That's why you're able to resolve hostnames.  The fact 
> that
> your TCP syns never get responded to suggest that they are being blocked
> someplace.  If the server is not running any firewall as you say, then 
> the
> only other logical place is at the border router.
>
> -g

<snip>

>> I've also talked to the isp( it's their router ) and they claim that 
>> if all the other computers can get web access then so should
>> the webserver.
>
My thoughts are that they probably know this is a server, and as such 
may have blocked TCP from that particular host IP address.


It appears UDP and ICMP are getting through.

>