Custom TCP Parameters for multiple interfaces in Linux
 

My question is about TCP parameters in Linux. By now, I want to change the default values of:

• Initial Timeout
• ACK Delay
• Idle Connection Timeout

I have a Linux Box with kernel 2.6.x and 2 ethernet interfaces. I know TCP is a stack that doesn't have anything to do with ethernet devices. Said that, the question: is there a way to set custom values for each interface? For example, a server listening to connections in eth0 would use one value for Idle Connection Timeout and another server listening to connections in eth1 could use a different value for that parameter.

Any considerations will be appreciated.
Best Regards,
Tiago

You said it yourself: those values govern stack processing in the kernel, not in ethernet devices. So the answer would be no.

Ok, thats fine. But maybe the question should be put in a different point of view. I want the things tied to interfaces, but it is not necessary to be like that.
Regarding to what is implemented in Linux Kernel: For example, is it possible to have distinct values for "TCP Idle Connection Timeout" for different connections? I know that seems strange to change these parameters, and to have different ones for each connection. But this is just what I need.

Thanks,
Tiago

I think the answer still to be no. But how about using virtualization? Tie one guest to eth0 and another to eth1?

Good point. It would be a solution. By virtualization did you mean using Linux-VServer project or something like that? Just for information, I'm running embedded Linux in a Power PC platform, not on a PC or server, so there are some limitations.

I was looking for something about not having to modify the stack, as it wouldn't be a fast and reliable solution.

Best Regards,
Tiago