This is driving me nuts!
I'm trying to set up a RHEL box in a DMZ to act as a proxy server for other machines in the LAN. The idea is that all the other machines won't have direct internet access, they'll all have to go through the proxy as the single point of internet access. We have installed a Juniper SRX firewall and the zones and security policies have been set up to allow the squid proxy full internet access via a NATed IP.
What works:
- Direct internet access from the squid box (bypassing proxy)
- Proxy access from the squid box works (so firefox has localhost as proxy address to use with default port 3128).
However, trying to use any other machine with the proxy does not work. I get either garbage data, a 400 bad request or the proxy returns an html page saying that the url is invalid.
This is even with a machine in the same DMZ subnet as the squid box so it's not a routing issue.
Basic settings:
- default squid proxy 3.1 configuration file (so it permits the used IPs). Running RHEL 5.8.
- firewalls, etc, all configured to allow content
Any ideas where to start looking?
Thanks![]()


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