Re: Open Ports
From: Mickey (anonymous_at_discussions.microsoft.com)
Date: 02/06/04
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Date: Fri, 6 Feb 2004 10:46:36 -0800
I guess what Sharad was saying was that your Internet
client trying to connect to the application hosted behind
the NAT will make a request to open these ports on your
NAT server. If they are mapped correctly they should open
upon request.
I mapped my ports correctly on the NAT. But sill couldn't
get my VPN client to go through the NAT.
Perquiaga, what portqry tool are you using to see if the
port is listening? I am troubleshooting my ports but could
find a good tool to test these ports. Please advise.
Thank You.
>-----Original Message-----
>HI!
>I've set up the port/service in NAT settings to forward
an incoming request
>in an special port used by an application witch i need to
be accessed from
>the internet, being installed on an internal workstation.
>Everything is done, but it dows not open the port on the
server. The
>settings in NAT indicates everything is OK. Incoming and
uotgoing port are
>the same, the protocol is the same the application uses
UDP, and the private
>ip the workstation has.
>Please, how do i open the port ?
>The portqry keeps saying NOT LISTENENING and I'm getting
mad.
>How do i get it to start listening ?
>Sharad told that a service must request the por to open ?
>but if the software is in an internal workstation, how do
i run a service on
>the W2K3 server to open the port ? can you explain me a
little ? i can't get
>it...
>thanks
>
>"sharad" <sharad@anonymous.com> wrote in message
>news:ubrDNFx6DHA.1368@TK2MSFTNGP10.phx.gbl...
>> Do you have a mail server on your server?
>> If not then get the free version from www.argosoft.com
and install it.
>> Change the SMTP port of the mail server, from default
25, to 500, then
>from
>> internet telent to your server by its ip address
followed by space
>followed
>> by 500
>> (e.g. telnet 64.91.10.101 500)
>> If it gets connected and says Welcome to xyz mail server
>> then port 500 is correctly enabled and can be opened
>> when requested.
>> Repeat above by changing the SMTP port of the mail
server to other ports
>you
>> want to check.
>>
>> Sharad
>> "Mickey" <anonymous@discussions.microsoft.com> wrote in
message
>> news:91f701c3ea29$89d14d60$a501280a@phx.gbl...
>> > Thank you, Sharad, for your quick response. I very
much
>> > appreciate that. Now I understand...
>> >
>> > Is there a utility to test requesting to open a port
>> > through the internet? The reason I am asking is that
I am
>> > trying to connect to my company's VPN server using
AT&T 's
>> > VPN network client from home's NATed environment. I
keep
>> > getting a IPSEC error...
>> >
>> > AT&T requested certain open ports. My problem is that
any
>> > client behind the NAT server are not able to connect
to a
>> > VPN server across the internet. If I bypass the NAT,
it is
>> > working fine. I got an 'IPSEC communication error...'
>> > AT&T stated that they are using l2tp and that I need
to
>> > open those ports: UDP 500, TCP 50, 5080, 379... on
the NAT
>> > Server/Router. Since I am using broadband connection,
>> > IPSEC drivers are needed and loaded by the AT&T client
>> > software at the client workstation to initiate the
>> > tunneling. But for some reason, the tuneneling can't
be
>> > established through the NAT. Any suggestions?
>> >
>> > Thanks again for your assistance.
>> >
>> > >-----Original Message-----
>> > >What you did is, gave access to the port from
internet.
>> > >You are asked open ports for connecting through
internet,
>> > which most
>> > >propably means, "Do not
>> > >block them, give access to them."
>> > >
>> > >It is not required to keep the port actually open.
>> > >
>> > >So you have given access now, through NAT. Now
>> > >a process should make a request to open the port,
then
>> > >it will communicate, after it is done the port will
be
>> > closed again.
>> > >Sharad
>> > >
>> > >"Mickey" <anonymous@discussions.microsoft.com> wrote
in
>> > message
>> > >news:8eed01c3ea1e$c3ddb030$a001280a@phx.gbl...
>> > >> Thank you, guys, for the input. I tried Service and
>> > Ports
>> > >> setup in IP Routing. I used the same ports for both
>> > >> incoming and outgoing (such as 1731) and put in the
>> > >> internal private IP. But when I do a port scan
from a
>> > web
>> > >> port scan tool site, it still shows that the port
is not
>> > >> open. Did I do something wrong? When I scan other
port
>> > >> like 1720, it shows that the port is open. Please
help!
>> > >> Thanks!
>> > >>
>> > >> >-----Original Message-----
>> > >> >Start - Administrative Tools->Routing and Remote
>> > Access.
>> > >> >
>> > >> >When it opens, expand "IP Routing" and under it
>> > >> >find NAT/Firewall and click on it. On the right
side
>> > then
>> > >> >you will find the adapters listed. Right click on
the
>> > >> adapter which is used
>> > >> >for internect connection, and
>> > >> >select properties.
>> > >> >When the property window opens click on Service
and
>> > >> Ports Tab.
>> > >> >There is already a list of standard ports which
are
>> > most
>> > >> >commonly used, and these can be opened by
checking the
>> > >> coresspoinding check
>> > >> >box. If the required port is not in the common
list,
>> > you
>> > >> can click on "Add"
>> > >> >give a description you like, and enter the
required
>> > >> incoming and outgoing
>> > >> >port.
>> > >> >Sharad
>> > >> >"Mickey" <anonymous@discussions.microsoft.com>
wrote in
>> > >> message
>> > >> >news:6dff01c3e6ad$c3bb7980$a501280a@phx.gbl...
>> > >> >> I am using Windows Server 2003 NAT and am
requested
>> > to
>> > >> >> open certain ports for a software to connect
over the
>> > >> >> Internet. I wonder if someone could tell me how
to
>> > open
>> > >> >> and/or close certain ports in Windows Server
2003 and
>> > >> how
>> > >> >> to configure port forwarding in NAT. Also, is
there a
>> > >> tool
>> > >> >> to list all open or closed ports?
>> > >> >>
>> > >> >> Thank you very much in advance!
>> > >> >
>> > >> >
>> > >> >.
>> > >> >
>> > >
>> > >
>> > >.
>> > >
>>
>>
>
>
>.
>
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