Sprint PCS - Ping IP Address of Sprint PCS Cell modem EVDO connection or reverse DNS

Author

Ping IP Address of Sprint PCS Cell modem EVDO connection or reverse DNS

Roark

2006-12-19, 10:33 pm

I have a new Pantech 500 aircard and the connection is fast here in
Burbank, Almost 1000 Kbs. When I'm connected, however, I need other
people on the internet to be able to ping my IP address (I do remote
support using Ultra VNC). When I was with Cingular (slow, dropped the
data connection constantly), they had a reverse DNS feature so that
myphonenumber.mycingular.cingular.com would always resolve to my
dynamic IP address. Sprint seems to have no such thing. That's OK, I
can use a IP Monster to maintain a dynamic DNS address but I can't even
ping my IP Address when connected. When I connect, I go to
www.whatsmyip.com and get my IP Address. Then, I go to www.dslreports
and run a smoke pipe tool. It returns that my address is un-pingable.
Thanks in advance for your help.

Paul Miner

2006-12-19, 10:33 pm

On 19 Dec 2006 13:35:37 -0800, "Roark" < petergrillo@sbcgloba
l.net>
wrote:

>I have a new Pantech 500 aircard and the connection is fast here in
>Burbank, Almost 1000 Kbs. When I'm connected, however, I need other
>people on the internet to be able to ping my IP address (I do remote
>support using Ultra VNC). When I was with Cingular (slow, dropped the
>data connection constantly), they had a reverse DNS feature so that
>myphonenumber.mycingular.cingular.com would always resolve to my
>dynamic IP address. Sprint seems to have no such thing. That's OK, I
>can use a IP Monster to maintain a dynamic DNS address but I can't even
>ping my IP Address when connected. When I connect, I go to
>www.whatsmyip.com and get my IP Address. Then, I go to www.dslreports
>and run a smoke pipe tool. It returns that my address is un-pingable.
>Thanks in advance for your help.

I believe ping is disabled at the incoming firewall to keep script
kiddies from doing ping sweeps across an entire subnet, waking up
devices that would otherwise remain dormant and causing those devices
to use precious RF resources. Try something other than ping and see if
you get different results.

--
Paul Miner

Paul Miner

2006-12-19, 10:33 pm

On Tue, 19 Dec 2006 22:04:57 GMT, decaturtxcowboy
< nope_none_@nowayspam
.com> wrote:

>Roark wrote:
>
>You might have been able to do that with Cingular in the past, but no more.
>
> From my are in north Texas, a ping to my cellphone dies out in Cingular's
>Atlanta center. We thought they might be simply blocking a ping request,
>but it goes further than that. We tried using UltraVNC with a port number
>that instant messenger programs are using (since they work, we know those
>ports are passable), but it still didn't work. We suspect there is likely
>port sniffing going on to prevent this. This is current information as of
>this fall.
>
>I never could get Sprint to work, but that is old information over a year
>old. Very likely they were and still are doing the same thing.
>
>Carriers appear to find good money in setting you up with a public IP
>address. Several thousand dollars to set you up and several thousand
>dollars a month for a large business enterprise.
>
>BTW, just tested my Cingular connection with whatismyip just to make sure
>my experience is current. Nope, it can't be pinged, nor can I see a web
>server being hosted on my laptop.

I just tried setting up an FTP server on my EV-DO connection card and
it worked pretty well, considering. I didn't bother trying a web
server to see if the results would be similar.

--
Paul Miner

Roark

2006-12-19, 10:33 pm

Paul Miner wrote:
> On Tue, 19 Dec 2006 22:04:57 GMT, decaturtxcowboy
> < nope_none_@nowayspam
.com> wrote:
>
>
> I just tried setting up an FTP server on my EV-DO connection card and
> it worked pretty well, considering. I didn't bother trying a web
> server to see if the results would be similar.
>
> --
> Paul Miner

I'm lost. Are you saying I can setup a web server? And then people can
ping my connection?

Paul Miner

2006-12-19, 10:33 pm

On 19 Dec 2006 16:54:33 -0800, "Roark" < petergrillo@sbcgloba
l.net>
wrote:

>Paul Miner wrote:
>I'm lost. Are you saying I can setup a web server? And then people can
>ping my connection?

Not at all. You said you wanted people on the Internet to be able to
ping you, but I don't think that's possible because I _think_ ping is
disabled at the edge of the network. So instead of using ping to make
sure your IP is alive, I suggested that you might be able to use
something else. In my example, I used an FTP server, but I suspect
there are a lot of possibilities available. Not ping, though.

--
Paul Miner

P.Schuman

2006-12-26, 10:33 pm

"Roark" < petergrillo@sbcgloba
l.net> wrote in message
news:1166564136.867065.297840@73g2000cwn.googlegroups.com...
> I have a new Pantech 500 aircard and the connection is fast here in
> Burbank, Almost 1000 Kbs. When I'm connected, however, I need other
> people on the internet to be able to ping my IP address (I do remote
> support using Ultra VNC). When I was with Cingular (slow, dropped the
> data connection constantly), they had a reverse DNS feature so that
> myphonenumber.mycingular.cingular.com would always resolve to my
> dynamic IP address. Sprint seems to have no such thing. That's OK, I
> can use a IP Monster to maintain a dynamic DNS address but I can't even
> ping my IP Address when connected. When I connect, I go to
> www.whatsmyip.com and get my IP Address. Then, I go to www.dslreports
> and run a smoke pipe tool. It returns that my address is un-pingable.
> Thanks in advance for your help.
>
just curious - exactly what do you select at - www.whatsmyip.com
as it appears to be a portal site.

P.Schuman

2006-12-26, 10:33 pm

you have to remember that each and every packet
usually has a destination "port" which usually equates to a common "service".
Ping is just another "service" that can be blocked by any internal router.
Very much like SMTP email ports blocked by some ISP's, to thwart spam.
So - you just have to find another "service" on your system to access
from the outside world.

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