Date: Wed, 30 May 2012 13:08:30 -0500 From: Jorge Biquez <jbiquez@intranet.com.mx> To: freebsd-questions@FreeBSD.org Subject: Firewall, blocking POP3 Message-ID: <3421246151-1670043725@intranet.com.mx>
next in thread | raw e-mail | index | archive | help
Hello all. I am sorry if the question is too basic. I have a personal small machine running FreeBSD 7.3-PRERELEASE #0: It runs as my web and email server for a cuple of domains. NO clients no other users have access to it. Is there any , easy/faster way to stop POP3 from being working. I am running qpopper to be able to download emailes. I decided to use sendmail since only a few accounts are there and I do not need more but in the last days the server has been under a big attack where people is trying to guess users and passwords. I am using a strong schema of passwords so no problem on that but I rather to be sure . I was thinking on the following options. - Stopping the service, port 110 to respond and open it everytime I want to download email. - Install a firewall and block all the IP's but they are trying from a lot different ones. - Maybe changing the port for pop3 and change all my devices to use another port? In case I need to start from zero and install a newer version I can do it, no problem at all but I am not sure if that helps to do things a easier way. Maybe install a complete different schema of sending receiving email (perhaps do not use sendmail to send , change to postfix and use IMAP instead of pop3. Would that help? Thank in advance for all your comments and help. Jorge Biquez
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3421246151-1670043725>