Peace!

IPSO 3.4.1-FCS10
FW-1 4.1 SP5a
Squid 2.4Stable6

Localnet is behind hide NAT. Localnet browsers' HTTP proxy points to FW:80; HTTP next 
proxy points to www-cache server in DMZ. HTTP rule is installed with resource 
(transparent proxy, wildcards; schemes: http, ftp; methods: all of them + *; host: *, 
path: *, query: *;). That resource gives me an opportunity to log Localnet users' HTTP 
requests.

If the next proxy points to the www-cache server in DMZ, the communication between 
them dies out at undefinite moment. But if I use my cache server's parent server as 
next proxy instead, everything works fine. Squid has no problem, because all 
servers/workstations in DMZ have access to it (HTTP traffic for DMZ  in firewall rules 
is defined without resource).

Also there was no problem, if a www-cache server was set up in Localnet. In this case 
I can't use HTTP resource in firewall, consequently I can't make TrendMicro's 
Interscan VirusWall to control HTTP traffic.

Does anyone of you know, how solve the problem with HTTP next proxy, HTTP resource / 
transparent proxy, and www-cache server in DMZ?


thanks in advance,

Uve Lokk

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