Re: server used as spammer

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Jerry,

Some quick hints:

Security Issue:

A) stay more up to date on squirrelmail packages.  That package has 
known exploits.

B) use  randomly generated passwords.  For example, this site came up 
from a quick Google search: http://www.thebitmill.com/tools/password.html

Auth Warning:

C) To allow the apache user to send emails using -f (essentially forging 
the name) without a warning, add this to your sendmail.mc and compile 
the cf.

define(`confTRUSTED_USERS', `apache') dnl

There is also a way to use a file called /etc/mail/trusted-users for 
example that can contain trusted users depending on your installation.

Regards,
KAM

On 3/11/2010 7:24 AM, Jerry Mersel wrote:
> I am using squirrelmail 1.4.17
> I have a user whose password was compromised in some way and the 
> squirrelmail
> server started sending out spam  email every second or so. (using 
> sendmail).
> I also got in the logs this warning -
>  Authentication-Warning:  machinename: apache set sender to some name 
> using -f.
>
> Can you recommend a way to prevent a recurrence of this.
>
> With Blessings
> and Best regards,
>
> Jerry
> 2363


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