Caught you there. You shouldn't trust that the more limited functionality (that is, localhost connections only) is in place and working in a system just because that is the Red Hat default or you have a pretty sendmail.mc file that appears to show only localhost connections are accepted. What if a substitute sendmail.cf file is either generated or inserted and sendmail is restarted? Pretty simple to do. Connections are accepted from anywhere, and relaying is turned on! So let me say this again: turn off relaying in sendmail. Translated, regenerate the sendmail.cf file using a sendmail.mc input you know for sure has the functionality you want. Eyeball it yourself, generate it yourself, and use it. Check the date and permissions of sendmail.cf every so often if you run a mail server. (Is this really your sendmail.cf? Although I believe older versions of Red Hat's sendmail regenerate sendmail.cf with each machine reboot, but I'm too tired to check that at the moment.) Bob On Tue, 2003-07-22 at 00:50, Joe wrote: > Robert L Cochran wrote: > > >You must have some sort of firewall active. > > > Yep, modern linux distros ship with iptables - and a pretty easy lockdown-- Shrike-list mailing list Shrike-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/shrike-list
