Firewall, blocking POP3
jbiquez at intranet.com.mx
Wed May 30 18:15:56 UTC 2012
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
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.
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