I am just shipping off a machine to go into an ISP to act as an SMTP, POP3, IMAP, list (superlist), WWW (apacheSSL), ftp and possibly IRC server. Load won't be high but I'd like to minimise risks of this leaf positioned machine being used for spoofing and forwarding. I _think_ I'm getting my head around how to use sendmail.cf to prevent SMTP forwarding while still allowing proper list functioning.
I think there are configuration options allowing IP forwarding that I should turn off in the kernel. Am I right? Anyone point me to the right info.? TIA, Chris
