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Skype -> upnp AddPortMapping port 4444?!
From: nbaronian at gmail.com (Nick Baronian)
Date: Thu, 2 Apr 2009 09:18:51 -0400

I am not sure which rule that is and if this helps but I have had decent
success in using an old Bleeding Edge rule to detect Skype.  According to
the author it shouldn't detect newer versions but I recall I was still
successful in detecting newer versions of Skype with it, even the
MySpace/Skype IM client.  I never fully verified which versions of
everything though.

On Thu, Apr 2, 2009 at 7:42 AM, Raffi Jamgotchian
<raffi at flossyourmind.com>wrote:

It does use upnp by default. They use their own implementation of it


On Apr 2, 2009, at 3:16 AM, Michel Lundell <michel at moose.se> wrote:

Hi l33t folks!

Does skype add a external port using upnp?
(and to the port 4444!!!?)
The port number seemes familiar ,o), also the AddPortMapping ...

This is a incident right? or does skype do this on the windows
Cant detect this behaviour on a linux box...

Scanned the router, but nmap did not detect any open port, so it may
failed or was closed when I performed the scan... maybe it failed?

I have not permission to access the router config yet....


#(26 - 8149) [2009-03-30 07:38:46] [local/100021] [snort/1:100021]
to router traffic alert
IPv4: ->
     hlen=5 TOS=0 dlen=903 ID=16342 flags=0 offset=0 TTL=128
TCP:  port=61432 -> dport: 4444  flags=***AP*** seq=1705820595
     ack=1383450833 off=5 res=0 win=64240 urp=0 chksum=15790
Payload: POST /wipconn HTTP/1.0<DIV class="nonascii">[2 non-ASCII
characters]</DIV>Host:<DIV class="nonascii">[2
non-ASCII characters]</DIV>Content-Type: text/xml;
charset="utf-8"<DIV class="nonascii">[2 non-ASCII characters]</
DIV>SOAPAction: "urn:schemas-upnp-org:service:WANIPConnection:
1#AddPortMapping"<DIV class="nonascii">[2 non-ASCII characters]</
DIV>Connection: close<DIV class="nonascii">[2 non-ASCII characters]</
DIV>Content-Length: 653<DIV class="nonascii">[4 non-ASCII
characters]</DIV><?xml version="1.0" encoding="utf-8"?><DIV
class="nonascii">[2 non-ASCII characters]</DIV><s:Envelope xmlns:s="
" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/";><DIV
class="nonascii">[2 non-ASCII characters]</
DIV><s:Body><u:AddPortMapping xmlns:u="urn:schemas-upnp-
org:service:WANIPConnection:1"><DIV class="nonascii">[2 non-ASCII
class="nonascii">[2 non-ASCII characters]</
DIV><NewExternalPort>6895</NewExternalPort><DIV class="nonascii">[2
non-ASCII characters]</DIV><NewProtocol>TCP</NewProtocol><DIV
class="nonascii">[2 non-ASCII characters]</
DIV><NewInternalPort>6895</NewInternalPort><DIV class="nonascii">[2
non-ASCII characters]</DIV><NewInternalClient></
NewInternalClient><DIV class="nonascii">[2 non-ASCII characters]</
DIV><NewEnabled>1</NewEnabled><DIV class="nonascii">[2 non-ASCII
characters]</DIV><NewPortMappingDescription>Skype TCP at (819)</NewPortMappingDescription><DIV
class="nonascii">[2 non-ASCII characters]</DIV><NewLeaseDuration>0</
NewLeaseDuration><DIV class="nonascii">[2 non-ASCII characters]</

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