ip addresses
- Thread starter bpayne111
- Start date
HJB417
Well-known member
It is also common practice to use port forwarding on a router.
HJB417
Well-known member
http://www.homenethelp.com/web/explain/port-forwarding-dmz.asp
to find out what the ip is, you need to connect to a sockect outside the the routed/private network and send back to the socket that originated the connection the ip address it used to connect to the listening socket.
to find out what the ip is, you need to connect to a sockect outside the the routed/private network and send back to the socket that originated the connection the ip address it used to connect to the listening socket.
HJB417
Well-known member
an ip can have many ports. the router listens on 1 ip shared by many ccomputers or devices with ips. ip forwarding is when the router forwards an ip packet to one of those computers or devices.
So lets say I have a router and 4 machines -> (A, B, C, D). I run a webserver on A on port 80, ftp on B on port 21, a SMTP on C on port 25. Lets say the routers ip is 141.222.2.1.
no port fowarding:
me connecting to 141.222.2.1:80, 141.222.2.1:21, 141.222.2.1:25 will result in an unsuccessful connection. the router will refuse my connection because the router has no services running on those ports.
with port forwarding:
1) tell the router to forward/send all requests with a port# of 80 to computer A port 80, send all requests with a port# of 21 to computer B port 21, and all requests with a port# of 25 to computer C port 25.
So if 24.68.43.22 wants to connect to the router on port 80, the router will forward this data to computer A.
kinda get what Im saying?
So lets say I have a router and 4 machines -> (A, B, C, D). I run a webserver on A on port 80, ftp on B on port 21, a SMTP on C on port 25. Lets say the routers ip is 141.222.2.1.
no port fowarding:
me connecting to 141.222.2.1:80, 141.222.2.1:21, 141.222.2.1:25 will result in an unsuccessful connection. the router will refuse my connection because the router has no services running on those ports.
with port forwarding:
1) tell the router to forward/send all requests with a port# of 80 to computer A port 80, send all requests with a port# of 21 to computer B port 21, and all requests with a port# of 25 to computer C port 25.
So if 24.68.43.22 wants to connect to the router on port 80, the router will forward this data to computer A.
kinda get what Im saying?
yea kinda but it all seems a little wierd
so if i have a user behind a router that wants to host my program, what is required to get the router to allow it to connect to the host computer?
im begining to accept that i cant do this with code, so what kind of user input am i gonna need to make it work?
thanks
brandon
so if i have a user behind a router that wants to host my program, what is required to get the router to allow it to connect to the host computer?
im begining to accept that i cant do this with code, so what kind of user input am i gonna need to make it work?
thanks
brandon
HJB417
Well-known member
a readme file stating what port the server listens on is more than enough.
the user will probably know how to do port forwarding.
the user will probably know how to do port forwarding.