In reply to a post by techguy:

I pay a company about 11 quid a year for mail hosting as it means I don't have to have anything in a DMZ, far easier.

A DMZ shouldn't be involved at all for hosting a mail server, just maybe one or two ports forwarded.

In reply to a post by Oliver341:

In reply to a post by techguy:

I pay a company about 11 quid a year for mail hosting as it means I don't have to have anything in a DMZ, far easier.

A DMZ shouldn't be involved at all for hosting a mail server, just maybe one or two ports forwarded.

Indeed, 25 and 110 at a minimum. Others may be useful

In reply to a post by Andrue:

Indeed, 25 and 110 at a minimum. Others may be useful

If POP3 access is intended to be exclusively from within the LAN, even port 110 (or 995 for POP3 SSL) may not be required to be forwarded.

In reply to a post by BatBoy:

How do you know "the firewall is holding" ?

Perhaps by the fact that internal firewalls are not being hit?

I found an interesting link which shows threats in real time.
The link is

http://map.ipviking.com

In reply to a post by Andrue:

You should see what my email server logs show:

My highlight of yesterday was a sustained SMTP flood originating from Vietnam. Needless to say, I've now blocked the originating netblock permanently.

In reply to a post by crule:

I found an interesting link which shows threats in real time.
The link is

http://map.ipviking.com

It's interesting to see that ssh attacks are the most prevalent. I suspect this is only the case since the heartbleed bug.

In reply to a post by crule:

I found an interesting link which shows threats in real time.
The link is

http://map.ipviking.com

I was watching that page for about 20 mins, man China hates the US LOL massive burst attacks even slowed me browser down, did about 1200 attacks at once
That page reminds me of Wargames, "How about a nice game of Chess"

Good link, but the current Canadian happenings are making up 2/3rds of things (Canada attacking Canada on ha-cluster). This is slowing down the page, I think.

The attack on USA from China did it for me.
However Canada was in second place when I was watching it.