Firewall Server 10.5 does not

Sorry for the double post, but the forum 10.5 server seems to be dead - I hope that someone here has a clue about these things.

*****************************************************************************

I'm trying to set up a firewall for my 10.5 server, but I can't seem to make it work. The main goal is to try to stop brute force constant mail connection attempts.

To this end, I installed fail2ban, to identify and prohibit connection failures. Most of the time it works, that is to say the mechanics submit banned IP addresses and send me an email for this purpose is accomplished. If I start a terminal session, I receive dozens of IPS listed with the following command:

sudo ipfw list

With an entry similar to:

12345 tcp refuse to 123.123.23.123 any in

But the ban is not only effective - the same IP address will try again later, sometimes every few seconds for hours

When I check the log of fail2ban, he complains (after that that it has detected a malicious connection repeatedly attempt):

'[Sasl-ipfw] 123.123.123.123 WARNING already banned '.

I tried the prohibition of formatting in different ways:

12345 tcp refuse to 123.123.23.123 to 127.0.0.1 dst-port 25

12345 tcp refuse to 123.123.23.123 to 192.168.123.123 dst-port 25

But simply do not make any difference. I even tried just a ban on local network for the web service:

12345 tcp refuse to 192.168.123.122 to 192.168.123.123 dst-port 80

But again, which has no effect. Other rules, seem to be by default, in the eyes of IPFW list as:

12300 allow the newspaper logamount 1000 tcp from any to any established

12301 allow the newspaper logamount 1000 tcp from one to one of

12302 allow the newspaper logamount 1000 tcp from any dst-port 22...

and a final settlement in the list (which I've read somewhere not editable):

allow 65535 ip at all

App server admin shows that the firewall service is running, there is no ads of 'decline' the newspaper of ipfw. The inputs patched in to fail2ban IPFW appear not in the Admin Server Anywhere entries, nor in the files ipfw.conf or ipfw.conf.apple (so I don't know where they are stored). But I see them when I me 'ipfw list' in the terminal and they are listed in the "Active rules" tab of the firewall section in admin server.

Thanks for any help on this matter.

Post edited by: Clive Bruton - formatting messed up!

This problem is solved, see:

Firewall Server 10.5 does not

Tags: Servers and Enterprise Software

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