On Jan 3, 2011, at 6:46 PM, John Musbach wrote:
> On Mon, Jan 3, 2011 at 4:42 PM, Levan, Jerry <[email protected]> wrote:
>> Does anyone have a simple 'hello' udp server that simply responds
>> 'hello' to any incoming connection. I could perhaps confirm that
>> the ports are open if I get a response. I used to have similiar
>> gadgets a long time ago, but my programming foo has weakened over
>> the decades.
>
> You could try this iphone app for testing:
> <http://itunes.apple.com/us/app/udp-tool/id377736572?mt=8>.
Thanks, I think that helped, perhaps, maybe...
I found a simple python udpserver via google:
*********************
#!/usr/bin/python
import socket
# A UDP server
# Set up a UDP server
UDPSock = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
# Listen on port 1701
# (to all IP addresses on this system)
listen_addr = ("",1701)
UDPSock.bind(listen_addr)
# Report on all data packets received and
# where they came from in each case (as this is
# UDP, each may be from a different source and it's
# up to the server to sort this out!)
while True:
data,addr = UDPSock.recvfrom(1024)
print data.strip(), addr
******************
Port 1701 appears to be the port that vpnd is listening to.
I killed vpnd via launch control and started the python server.
If I use the UDP-tool (on my iPad) that you recommend with wifi turned on
so I am a member of my private network and send a message to the server
on port 1701 via the wan facing IP of the router then
the server responds with the message I typed in the box
and the 'addr' displayed is the wan facing IP of the AEBS.
When I turn off wifi and go with 3G, the datagram *does* reach
the server and the address displayed is the 3G iPad IP.
So it appears that port 1701 is *not* blocked by AT&T.
Now after I killed the python server and restarted vpnd via
launchctl and tried connecting the iPad using wifi to the
vpn, it worked! (not very useful since I am already a member of my local
network).
However turning off wifi and attempting to connect via 3G
*fails*.
Earlier today I could not connect via wifi ( at my home or a bookstore hotspot).
This is getting a bit depressing...and confusing.
Jerry
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