What program is the best to make a server???

With Linux you can save more money it was profitable for ISP. the best? I'm not sure but almost all ISP using linux as they server just choose which linux version you want to use. I don't know which version is the best all people have different opinion which one is they like.

I would recommend using Linux to use a server but there are some points that you must consider in choosing the right distribution for you. 1. Consider your server hardware especially when you're using high end servers from Intel, Dell, Compaq, IBM, Asus, etc. Linux distributions sometimes experience compatibility issues regarding these high end servers, commonly on kernel packages about sata/scsi drives, hot-swap controllers, CPU specs and others. You can first check on the servers web site the technical aspects of your server and the tested Linux distributions for it. 2. Consider your main type of use. As you said,it will be used for ISP purposes so better have a Linux distibution that are capable of having all the services that you will need. (e.g. Apache, Samba, Squid, etc) But i think almost every Linux distribution can have these pakages, the only problem is on how will you enable/configure them because sometimes other packages are not installed, you need to download and install certain packages for it to work. 3. Lastly, consider your expertise. If you already satisfy the first two factors, then it would be better if you will have the Linux distribution that you know better.. Thats my point of view for this topic. Thanks

i think linux is best for use as a server.

Linux definitely, its open code, its free, its more stale and more powerful than windows, hell man you should have had a linux server by now, try it its the best you can do....take care

i would suggest you running linux as your server. it has built in bandwidth management. sure this is one of the most needed for running an ISP. My friend using Slackware Linux as server. i think almost all Linux is ready for server. even Ubuntu.