Can sasl/sendmail Report IP Of Failed Access?
bc979 at lafn.org
Tue Jun 4 21:51:22 UTC 2013
On 4 June 2013, at 08:47, Tim Daneliuk <tundra at tundraware.com> wrote:
> I am seeing login dictionary attacks on a FreeBSD mail server being
> reported. Is there a way to determine the IPs that are doing this
> so they can be blocked at the firewall? auth.log only
> notes the attempted user name, not the IP of origin.
I wrote some code to find the appropriate maillog entries which do include the IP addresses. It automagically adds the IP addresses to the pf blackhole table if certain criteria is met. The criteria is changeable. If you would like a copy, let me know.
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