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Linksys port forwarding question...

T

Tonec

Golden Member
I have a static ip and use DHCP with the Linksys 1.35
If I wanted to open a single port for four pcs do I have have to use up 4 of the 10 slots or do I enter it only once.
 
One option I have not tried is to specify a port range and then specify x.x.x.255 for the address. 255 is a broadcast address. If this were to work, what this means is that the incoming client request would be broadcast to all machines on the local network. This does have potential problems, such as... which machine responds to the request in that event? I don't think this would be a reliable solution, but I have not tested it.
 
If I interpret Tonec's request correctly, he has four systems on his local network that are behind a Linksys router. He wnats to enable port forwarding for all four systems because, presumably, they are acting as servers for some type of application... ftp, web, telnet, icq, or something else.

With the Linksys router, you are limited in how many slots you have available for defining port forwarding. Even though you can specify port ranges, you can only specify 1 ip address for each port range.

for example:

forward ports 21 - 80 to 10.10.0.100
forward ports 21 - 80 to 10.10.0.200
forward port 6697 - 6699 to 10.10.0.200

He is asking if there is a way to specify multiple ip's for a range of ports so he wouldn't have to use multiple slots.

for example:

forward ports 21 - 80 to 10.10.0.100 and 10.10.0.200

However, the Linksys does not allow for this type configuration, which would be useful for mostly for Napster and ICQ users.

Any address at x.x.x.255 is a broadcast address. the data is broadcast to any machine on that subnet that is listening on that particular port. So if he wanted to have ICQ running on all four machines and be able to perform file transers, he would want to enable port forwarding for all those systems. My tentative suggestion, which I am doubtful would work reliably (provided the Linksys config even allows it) is to use the broadcast address as follows:

forward ports 6697 - 6699 to 10.10.0.255


I don't know if this would work given the limited abilities of the Linksys router and all the routers that have recently been put on market for "home" use. I don't know that Linksys or any of the other low end routers of that type even allows you to specify a broadcast address.

I have not tried to do this. I am only offering up theory.
 
Thanks for the advice Spiff, didn't work for me though. I just gave up on the linksys and purchased the barricade to replace. Definately an improvement.
 
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