Hi all, just found your site, a friend recommended it.
I installed Red Hat Linux 8 a couple of weeks ago. Mainly because my W2K server kept getting stop errors, which may or may not have been hardware/software/driver related. Anyway, in addition to replacing the computer, I replaced the OS.
It ran fine for a couple of weeks. Sunday night I got FTP up and running, and, of course, most of my website on it. Monday morning... the ports which were opened changed. Now I think it was actually my DSL/router which had reset overnight and changed the internal IP address of my server (I had not changed the NAT settings on my DSL after putting the new server on... so the old IP address was in effect. After reset, the server has a new IP address). Anyway, not wanting to risk having been cracked, I reinstalled the OS. Which I probably didn't need to do. Instead I needed to look at the ports.
However, it's done. I am still, however, having problems opening the ports. Of course this 2nd install was quick and dirty, I didn't read my book quite as exensively as I did the first time (Red Had Linux 8 Bible).
I did get the NAT settings right on my DSL, and I'm actually only trying to get the email working at this point, because my server is mainly my email server. I have been checking my ports through Sheilds UP! (https://grc.com/x/ne.dll?bh0bkyd2
). The ports 25, 110, and 80 all went from 'stealth' to 'closed'. I actually did manage to get port 110 open, and I can connect to the server via POP3. I managed this after changing the pop3 file located in .. oh I'm going off memory now because I'm not in front of my server... I think in /etc/xinet.d/pop3.. I changed disable = yes to disable = no. That seemed to get that up.
Oh, I am running Guarddog as my iptables firewall management tool. I have SMTP, POP, AUTH/IDENT, HTTP, DNS.. all open. The same settings I had Sunday night, which worked. However, the port tool still shows 25 closed.. so SMTP is still down.
Any tips on what I would need to do to get port 25 open for SMTP? Is there another configuration file that I need to fiddle with? I've customized the main.cf file... I'm using Postfix as my mail server software. It was working fine before the reinstall, and before the ports were closed... (bashes self on head for reinstalling and not checking the DSL first).
After this I'll work on getting port 80 open again... but 25.. all my email is bouncing, and I just hate that.