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Old 02-22-2011, 07:36 PM   #1
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Registered: Sep 2009
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Strange situation: network gatewayed, then proxied

Hi all experts,

I've a strange situation in my network: pcs gatewayed to another network, then a proxy, then a firewall.

pcs --> router --> cloud --> router --> proxy --> switch <-- fw --> Internet

(router, proxy and fw are alla connected by the switch)

Some months ago the situation was :

pcs --> router --> cloud --> router --> switch <-- fw --> Internet

There was a static route in the router that gatewayed the packets to the firewall, but that route has been deleted, and I cannot reinsert it because I've not access to the routers, so we have to use a proxy to go to Internet, and we have the configuration of all pcs (Windows XP) with the fields "proxy" filled.
The proxy ha only one NIC gatewayed to the firewall, and Ubuntu and squid installed, but we have some problems:
1. we cannot use email, so how can we make port 110 and 25 packets pass?
2. squid seems to slow down, so can we uninstall it and route all the traffic directly to the firewall to speed up?

Old 02-23-2011, 07:16 AM   #2
LQ Newbie
Registered: Feb 2011
Posts: 13

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there seems to some problem with the squid...if it is intended to cache the browsing then it is not going to interfere with the mail...the problem could be the firewall...ask if it is blocking those ports.
Old 02-23-2011, 04:48 PM   #3
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Registered: Sep 2009
Posts: 4

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Hi besolius,

the firewall was tha same used when we had not to use the proxy, programmed in the same manner, and we had not problems with email.
The problems started when we had to put the proxy between...



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