server socket ip address problem

EyeSight · 04-02-2012 04:49PM #1

Hi, I am running a serverSocket(port 4242) on an android phone(in java). a PC or another android device has the ip address of the server phone and wants to connect to the socket.

however the connection never gets made.
I think this is because the ip address is probably for the router in which the server phone is connected via wifi, and the router does not know the DHCP address of the phone.

I am just wondering if there is a way to programatically solve this problem. i can't expect users to port forward their phone on every router the connect to via wifi

azzeretti · 05-02-2012 10:28AM

EyeSight wrote: »

Hi, I am running a serverSocket(port 4242) on an android phone(in java). a PC or another android device has the ip address of the server phone and wants to connect to the socket.

however the connection never gets made.
I think this is because the ip address is probably for the router in which the server phone is connected via wifi, and the router does not know the DHCP address of the phone.

I am just wondering if there is a way to programatically solve this problem. i can't expect users to port forward their phone on every router the connect to via wifi

Unless the server and phone are on a different network (across WAN/VLAN etc) then the router shouldn't come into it. Are you testing on a local network?

srsly78 · 05-02-2012 12:33PM

http://en.wikipedia.org/wiki/Universal_Plug_and_Play

EyeSight · 05-02-2012 01:58PM

i was testing on a local network and that worked fine. however when i try it on the internet it no longer works. it will need to work on the internet, not just a local network

Colonel Panic · 05-02-2012 04:26PM

That is where uPnP comes in...

server socket ip address problem

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