Re: How to test newly opened port?

From: Steve (as_at_joe.ca)
Date: 08/30/04 

Date: Mon, 30 Aug 2004 11:16:14 -0400

Thanks for replying. If I run the netstat -na command, it shows the external
IP with the UDP 20004 *:*. Can I assume that the port is open?

Steve

"Jack Pea***" <pea***@simconv.com> a écrit dans le message de
news:%23DAXbYIjEHA.384@TK2MSFTNGP10.phx.gbl...
> "Steve" <as@joe.ca> wrote in message
> news:u8f$fiGjEHA.3712@TK2MSFTNGP15.phx.gbl...
> > Hi,
> >
> > I have an alarm system device that can send data to an alarm central
thru
> > Internet. This device is connected to the hub and has its own IP
address.
> > The vendor told me that I have to open UDP port xxxxxx to allow the
device
> > signal to go to a Web central server. I opened a UDP port but how can I
> > check if this port is really open without contacting the central? I ran
> > AATools but I'm not sure about the result and currently, the central
says
> > that they don't get any signal.
> >
> Is the web server on the same physical machine as the ISA server? If not
> then you have to enter a server publishing rule to direct the traffic on
the
> UDP port to the server behind the firewall. If it is on the same server
> then you have to enter packet filters.
>
> Can you ping the ISA server from the remote site, and from ISA to the
remote
> site (or at least the routers)? You have an additional problem in how the
> remote site knows which IP address to use if your ISA server has a dynamic
> internet IP. A ping will tell you if a path exists based on your routing
> tables.
> Jack Pea***
>
>