GRE is NOT a port! It is an IP protocol, just like TCP or UDP. The data
crossing the Internet is encrypted and enclosed in a packet with a GRE
header. If anything in the path blocks GRE, no data is received and the
connection closes. Apart from listing it by name or by protocol number (47),
some firewalls refer to PPTP pass-through mode or even VPN pass-through to
indicate that GRE is allowed.
"Dave Beanie" <(E-Mail Removed)> wrote in message
news:E88E37AD-1428-479C-BA00-(E-Mail Removed)...
> Where would I setup gre port 47?
> Thanks
>
>
> "Bill Grant" wrote:
>
>> It is almost certain to be a GRE problem.
>>
>> Incidently, port 47 (TCP or UDP) has nothing to do with this. GRE is
>> IP
>> protocol 47, not a port.
>>
>> "Dave Beanie" <(E-Mail Removed)> wrote in message
>> news:3C046C1F-4E09-4894-8468-(E-Mail Removed)...
>> >I justed checked with Comcast and they say they do not block GRE packets
>> > Also I have a linksys router, I am going to upgrade the firmware and
>> > try
>> > that.
>> > What confuses me is that if i us the intrant i can log on no problem,
>> > its
>> > just when i use the internet i have to problem.
>> > thanks
>> >
>> >
>> > "Dave Beanie" wrote:
>> >
>> >> Sorry i forgot, internet to wan side, gets up to verifying username
>> >> and
>> >> password,
>> >> Thanks
>> >>
>> >>
>> >> "Dave Beanie" wrote:
>> >>
>> >> > here is what i have, i can get to the internet through either
>> >> > connection,
>> >> > I can setup a vpn session to 10.0.1.106 from my local pc
>> >> > (10.0.1.107)
>> >> > and it
>> >> > connects, but if I try and go from 10.0.1.107 - internet my ip on
>> >> > the
>> >> > wan
>> >> > side of my router, i get the 721 error.
>> >> > I use the same user name and password on both connections
>> >> > in my router is forwarded ports
>> >> > 41-47 to 10.0.1.106
>> >> > 1723 to 10.0.1.106
>> >> > maybe i dont have port 47 setup right, i just set it up under port
>> >> > forwarding to go to my win2k3 sevr
>> >> > pptp pass through is enabled.
>> >> > Please suggest anything, I have tried most things I have found on
>> >> > the
>> >> > internet, including disableing nic 2 until the svr boots up, still
>> >> > not
>> >> > working?
>> >> >
>> >> >
>> >> >
>> >> > router --- hub --- win2k3 server nic 1
>> >> > 10.0.1.5 -- 10.0.1.106
>> >> >
>> >> > other side
>> >> >
>> >> > router --- hub --- router --- w2k3 svr nic 2
>> >> > 10.0.1.5 -- 192.168.15.1 -- 192.168.15.2
>>
>>
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