RE: [squid-users] Urgent Help Needed :Two Squid Servers performance issue when working with NAT

From: Adam Carter <Adam.Carter_at_optus.com.au>
Date: Fri, 25 Jul 2008 14:14:57 +1000

> > part of netstat -na in squid2 output like following:
> > tcp 0 1 198.18.24.3:46304 10.56.233.99:9999
> > SYN_SENT

This shows that 198.18.24.3 cant communication with 10.56.233.99, so assuming no firewalling, you have a routing problem (which could be a NAT problem). Run a sniffer on 10.56.233.99,
- if you don't see the SYNs coming in, then 198.18.24.3 cant route to 10.56.233.99
- if you see the SYNs come in and 10.56.233.99 reply with syn/ack, then you have a routing problem from 10.56.233.99 to 198.18.24.3.

Remember you need to have 2 routes to get TCP working - one to the server and one to the client. If you NAT then you'll need route(s) for the NATed addresses as well.
Received on Fri Jul 25 2008 - 04:12:08 MDT

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