From: Emilio Ruben Estevez (emilioestevezzhotmail.com)
Date: Mon May 03 2004 - 13:26:46 CDT

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Hi, im running postfix last stable version on a linux box with mandrake 9.2,
with a shorewall 2.01(i downloaded from shorewall.net and configured it like
documentation at shorewall site says) on a Pentium III with 512 MB ram.

The problem is that when users of the intranet read mails trough outlook
express 6, it takes up to 2 minutes to connecct to the server, and donwload
mails. But if i change shorewall policy (net all ACCEPT) then it reads mails
instantly, but for security reasons i can´t use that policy, maybe im not
openning the correct ports?? Any hint? These are the rules that i´ve setted
up on the firewall rules:

# Allow access to Mail System & Other useful ports
ACCEPT net fw tcp 25
ACCEPT loc net tcp 25
ACCEPT loc fw tcp 110
ACCEPT loc net tcp 110
ACCEPT loc fw tcp 25
ACCEPT loc fw udp 25
ACCEPT loc fw udp 110
ACCEPT net fw tcp 143
ACCEPT fw net tcp 143
ACCEPT loc fw tcp 143
ACCEPT fw loc tcp 143
#
#ACCEPT net fw udp 143
#ACCEPT loc fw udp 143
ACCEPT loc fw tcp 193
ACCEPT loc fw tcp 193
#ACCEPT loc fw udp 756
ACCEPT fw loc tcp 193
#ACCEPT fw loc udp 756

Thanks!
Emilio.

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