[CentOS] sendmail security

John Hinton schrieb:

>> On Wed, 2006-09-20 at 05:12, abhishek singh wrote:
>>  
>>
>>> yes i am using SMTP Authentication , but when i m
>>> doing telnet to my server on 25 port so i am able to
>>> send mail by unknow user that in in not my mail server
>>> like
>>
>> [ snip ]
>
> Do you have telnet open to the outside world? If so kill it and only 
> allow ssh with the proper extra security setup. You may need to open 
> telnet for a little while for testing purposes, but don't leave it 
> that way.

What has using the telnet client for testing a daemon on a tcp port to 
do with running a telnet daemon?
Answer: nothing.

> John Hinton

Alexander