I was hoping for some advice on a proxy and firewall setup I am doing, as I am a bit unsure of what will have to be done.
I have setup a transparent Squid Proxy for Caching and to give the internal lan access to the internet. Thus it is configured transparently with a few Access rules and it has some IPtables rules in. For the setup I set it up with my router as the main point of internet access with the Proxy behind it and then the LAN.
But we have an already existing Firewall (Cisco Pix) what we need to use. Thus from the router it will then be the Firewall and then behind it the proxy and then the rest of the lan.
Will anyone be able to tell me what changes I will have to make (except for configuring the network interfaces between the Proxy and Firewall) to the Squid Proxy and the Cisco Pix to allow the traffic from inside to go through the proxy and then trough the Pix, but still making use of the Pix Firewall rules?
Or will it maybe be possible to switch of/disable all the firewall/iptable/acl on the Squid Proxy that only the Cisco Pix is the only Firewall access control method?