[CentOS] Per-user limits for port access

Alexander Dalloz ad+lists at uni-x.org
Thu Aug 21 11:46:30 UTC 2008


Jussi Hirvi schrieb:
> Centos 5.x again...
> 
> Is there a way to limit port access on a per-user basis? My practical goal
> is to limit, who is allowed to use SMTP AUTH in Sendmail. Any possible
> solutions appreciated...
> 
> Obviously, limiting by ip will not work, since the very purpose of SMTP AUTH
> is to enable mail relaying for trusted users from *anywhere*.
> 
> - Jussi

Pretty simple. If your intention is to define SMTP AUTH usage
independent from shell access (i.e. by SSH) - side node: really think
about whether it is a good idea to have user logins on your mail server
- you should use sasldb as your SASL backend. You have to create the
sasldb manually and this way you control who is permitted to relay remotely.

Alexander



More information about the CentOS mailing list