Hi Reio,
this is my first filter plus my first go program so I might miss something.
This is what I did
----
pkg install go
git clone https://github.com/whataboutpereira/filter-auth.git
cd filter-auth/
go build filter-auth.go
cp filter-auth /usr/local/libexec/opensmtpd/opensmtpd-filter-auth
Add filter to the listen entry
vi /usr/local/etc/mail/smtpd.conf
...
filter auth proc-exec "opensmtpd-filter-auth"
...
listen on igb0 tls pki my.hostname.de hostname my.hostname.de filter {
rspamd, auth}
service smtpd restart
Performing sanity check on smtpd configuration:
/usr/local/etc/mail/smtpd.conf:13: syntax error
/usr/local/etc/mail/smtpd.conf:26: syntax error
-----
Any idea where the syntax error is created
Regards
Hagen.
On Thu, Jun 23, 2022 at 08:17:02AM +0200, Hagen Bauer wrote:
Hi Reio,
great that looks like a solution for me. I will give it a try.
Regards
Hagen
On Wed, Jun 22, 2022 at 10:16:00PM +0300, Reio Remma wrote:
Filters are indeed the way to go.
I'm personally using a reporter to log failed authentications which
I'm feeding to fail2ban to block.
https://github.com/whataboutpereira/filter-auth
Good luck
Reio
On 22.06.2022 20:56, Pete wrote:
Hi,
the best is probably to implement a custom report ing filter that fits you
needs.
http://man.openbsd.org/man7/smtpd-filters.7
Hi,
i would like to use crowdsec to evaluate my mail logs. My current idea is to
block all users that try to login on port 25
```
smtp connected address=43.zzz.yy.xx host=<unknown>
smtp failed-command command="AUTH LOGIN" result="503 5.5.1 Invalid command: Command
not supported"
```
So the trigger is line 2 but the ip address is in line 1
Unfortunately there seems to be no way for crowdsec parser to evaluate 2 lines
Is there any chance or idea how I could change the logs to include the address
in line 2
Regards
Hagen Bauer
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