[OT] IANA ports (was: Filezilla a security risk)

[Camaleón <noelamac@gmail.com>]

On Sun, 08 Jul 2012 16:36:20 +0200, Slavko wrote:

> Dňa Sun, 8 Jul 2012 11:59:50 +0000 (UTC) Camaleón <noelamac@gmail.com>
> napísal:
> 
>> > By mi search, the standard is SMTP + STARTTLS and not SSL + SMTP.
> 
>> There are different implementations, all of them standarized:
>> 
>> While imaps (tcp/993), pop3s (tcp/995) and smtps (tcp/587) make use of
>> specific computer ports, imap, pop3 and smtp using "STARTTLS" keep the
>> same ports that their non-encrypted counterparts (143/110/25) to
>> transmit clear text credentials protected.
> 
> if smtps is standardized, then why i see this:
> 
> grep 587 /etc/services
> submission	587/tcp				# Submission [RFC4409] 
> submission	587/udp
> 
> but:
> 
> grep smtps /etc/services
> ssmtp		465/tcp		smtps		# SMTP over SSL

You can query for both in one line:

sm01@stt008:~$ grep -e 587 -e 465 /etc/services
submission	587/tcp				# Submission [RFC4409]
submission	587/udp
ssmtp		465/tcp		smtps		# SMTP over SSL

What's what you don't like here? The old port could be still there for 
legacy/backward compatibility issues.

> can you please tell me the RFC about SMTPS?

http://en.wikipedia.org/wiki/SMTPS

>> Well, when opening ports is not possible (consider a restricted
>> environment) or as Wikipedia¹ explains, independency and transparency
>> seen as a plus when using this extension.
> 
> i know about differences both of the implementations.

Fine, but you asked.

Greetings,

-- 
Camaleón