SMTP leaking AIX ver

[seanc724]

a network scan has revealed that SMTP is leaking my version of AIX.

[SMTP/25/TCP] Server version is 'Sendmail AIX5.1'.

does anyone know how i can prevent this?

 

[aixmurderer]

Look for this entry in your sendmail.cf file, modify to suit:

# SMTP initial login message (old $e macro)
O SmtpGreetingMessage=$j Sendmail $v/$Z; $b

IBM Certified Confused - MQSeries
IBM Certified Flabbergasted - AIX 5 pSeries System Administration
MS Certified Windblows Rebooter

 

[beatleman]

You may also have to remove the "($v/$Z)" entry from the "Received:" stanza shown below.

The $v = Sendmail version
The $Z = OS version (i.e. AIX 5.2)


HReceived: $?sfrom $s $.$?_($?s$|from $.$_)
$.$?{auth_type}(authenticated$?{auth_ssf} (${auth_ssf} bits)$.)
$.by $j ($v/$Z)$?r with $r$. id $i$?{tls_version}
(using ${tls_version} with cipher ${cipher} (${cipher_bits} bits) verifi
ed ${verify})$.$?u
for $u; $|;
$.$b