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Re: Sendmail



Am Di, den 12.04.2005 schrieb William M. Quarles um 5:05:

> I'm trying to set up Sendmail for the first time, and I don't really
> know what I am doing beyond the man file and some stuff on their
> website.  I modified the configuration file and I'm supposed to do this
> (followed by the message that I received):

http://www.brennan.id.au/12-Sendmail_Server.html

That is a handy tutorial. Just forget the "stupid" advise to harden
Sendmail against hackers by modifying the greeting banner. Only fools
expect they could make their system more safe by hiding version numbers.
Speaking about Sendmail the howto guy misses that he would have to patch
the Sendmail sources as well to hide the version from HELP command. And
more general, hackers don't care for version numbers ... they run their
exploits against victim hosts and see where it hits.

> [root physstud root]# m4 /etc/mail/sendmail.mc > /etc/sendmail.cf
> /etc/mail/sendmail.mc:8: m4: Cannot open
> /usr/share/sendmail-cf/m4/cf.m4: No such file or directory
> 
> I don't know how to make an m4 file.  Could somebody give me a hand?

Has been said already: sendmail-cf is needed to be able to create a new
sendmail.cf from a modified sendmail.mc.

> William

Alexander


-- 
Alexander Dalloz | Enger, Germany | GPG http://pgp.mit.edu 0xB366A773
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