[asterisk-users] asterisk network connections

[Steve Edwards]

> On Behalf Of Jonas Kellens
> 
> with the command lsof -i I notice the following network connections of the asterisk proces :
> 
> asterisk  23006 root   12u  IPv4 1088961 UDP *:mgcp-callagent
> asterisk  23006 root   13u  IPv4 1088964 TCP *:sieve (LISTEN)
> asterisk  23006 root   16u  IPv4 1088966 UDP *:iax
> asterisk  23006 root   17u  IPv4 1088967 UDP *:commplex-main
> asterisk  23006 root   18u  IPv4 1088968 UDP *:4520
> asterisk  23006 root   20u  IPv4 1088969 TCP *:h323hostcall (LISTEN)
> asterisk  23006 root   21u  IPv4 1088970 UDP *:sip
> 
> Now, iax and sip I find normal...
> 
> What is all the rest ??

On Fri, 17 Feb 2012, Danny Nicholas wrote:

> 4520 is for DUNDI. Obviously your install uses H323 in some
> flavor. Mgcp-callagent is for jitterbuffering? And sieve and
> complex-main I have no clue (perhaps H323 tag-alongs)

The service name displayed comes from the services file (/etc/services). 
It is only a 'clue.' It is not authoritative, unambiguous, or exhaustive.

For example, on my CentOS dev box:

$ egrep 'commplex-main|mgcp-callagent|sieve' /etc/services

sieve           2000/tcp # Sieve Mail Filter Daemon
sieve           2000/udp # Sieve Mail Filter Daemon
mgcp-callagent  2727/tcp # Media Gateway Control Protocol Call Agent
mgcp-callagent  2727/udp # Media Gateway Control Protocol Call Agent
commplex-main   5000/tcp
commplex-main   5000/udp

I doubt Asterisk is acting as a 'Sieve Mail Filter Daemon' and I don't 
have whatever application defines 'complex-main' on your box.

It's the numbers that matter. For example, on my Ubuntu desktop box:

$ egrep '2000|5000' /etc/services
cisco-sccp	2000/tcp	sieve		# Cisco SCCP
cisco-sccp	2000/udp

So, 2000 is sccp (aka Skinny) and we* still have no clue what 5000 is used 
for.

Note that these are the assigned or default port numbers. You could 
configure SIP to listen to 5000 (or 2000) if you wanted to -- 'job 
security through code obscurity.'

*) I'm just a 1.2 Luddite, so keep that in mind :)

-- 
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                              Fax: +1-760-731-3000