"Jonathan Kay [MVP]" wrote:
> Greetings,
>
> The reason you see different information is because it's changed several times. Most sites
> are still reporting the ports from Messenger 3.x which are plain wrong and won't work.
>
> There is actually now an official KB article on this topic with the actual factual
> information about this (there was one before, but the info is wrong):
> http://support.microsoft.com/kb/927847
>
> Your best bet is to use UPnP as it will automatically open the correct ports when required.
> That, or open nearly all of them (see KB article).
>
> --
> Jonathan Kay
> Microsoft MVP - Windows Live Messenger/MSN Messenger/Windows Messenger
> Associate Expert
> http://www.microsoft.com/windowsxp/expertzone/
> Messenger Resources - http://messenger.jonathankay.com
> All posts unless otherwise specified are (c) 2007 Jonathan Kay.
> You *must* contact me for redistribution rights.
> --
>
>
> "Fabelus" <> wrote in message
> news:5A5C5C03-1F7A-4D89-B2DB-...
> > Hi
> >
> > I have installed latest WLM version, but some firewall issues are occurred;
> > now I want to configure properly my firewall (Sygate 5.6 last build and
> > signature) in order to get WLM to work properly. In Sygate, there is an
> > option that block all UPnP traffic. If this option is unchecked, WLM works
> > without problem, but I prefer improve security keeping it active, trying
> > trough some firewall rules in order to open UPnP ports used by WLM. So, i
> > taked a look at Sygate Traffic Log to understand what ports (TCP/UDP) are
> > involved in WLM process, but they are never the same, thay change
> > continuously. I googled for my problem, and I found port's list used by
> > messenger behind a firewall but:
> >
> > 1) Info are poor
> > 2) Every site, do not recommends the same ports, so I am a bit confused
> > 3) Info are old, so I suppose that they can work for old version like MSN
> > Messenger...
> >
> > Someone suggest me to open the range 1024-65535 but this will not improve
> > system security...
> >
> > How I can precisely know what ports I have to open? Can I create some
> > firewall rules in order to get WLM to works properly without too much
> > decrease security level?
> >
> > Thanks and forget my bad english
>
>
Hi Jonathan, thanks for your very very helpful post. It is definitely what I
was looking for... Maybe, I can try to create rules based on WLM Remote Ports
instead Local Ports; I noticed that my ports are never the same, but the
remote ports involved seems to be fixed (for example there is UDP port 1900
Remote Host that is sending me incoming UPnP traffic requested by
msnmsgr.exe...)... I will try!
P.S. I think that new versions of messenger (Windows Live Messenger) not use
fixed local ports, but available local ports are scanned every time user
performs access to WLM, due this fact they are random...In fact, as soon as
WLM access is established, Sygate scanning ports alert me ...
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