My setup is : Internet ---[a.b.c.d MasqueradingFirewall 192.168.0.1] --- [192.168.0.5 MailServer]
On my firewall I have executed the command "ipmasqadm portfw -a -P tcp -L a.b.c.d 25 -R 192.168.0.5 25" so that incoming SMTP will be forwarded to machine 192.168.0.5. I don't seem to be able to send mail to the mailserver via the masquerading firewall (eg. [EMAIL PROTECTED] should get redirected to [EMAIL PROTECTED]). It gets bounced back with unknown DNS host. How can I test that my firewall is letting through the SMTP packets ? The IPMASQ FAQ (sect 7.31) says "You have to first understand that both IPFWADM and IPCHAINS run *AFTER* the routing system has decided where to send a packet." I assume this is true for portfw, so I don't need to setup a specific "ipchains input" rule for that host/port". Is that correct. Assuming my "ipmasqadm portfw" command above is correct, is there any other commands (ipmasqadm, ipchains, etc) that I need to run to get mail coming in to my masqueraded mailserver (192.168.0.5) ? There is an example in section 7 of the IPCHAINS FAQ, but the servers in the demilitarised zones have public IP addresses. It purely uses IPCHIANS, not portfw. I think I need portfw because of the masquerading. Is this correct ? Thanks, Brendan Simon. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
