I wont to add something this thread , my experience.
I was a while (5 or 6 month) that I run from myself 3 LFS servers on the same time , and abaut from a weak ago I wont to do the same , but I cant , I know the procedure , I was saved my old servers on my hard drive and airio to connect them but no working.
When I testing the servers are visible on LFS world but you cannot join to them and I dont see them on my server list , on local I entering but thrue internet not. , and I dont know what was the problem , today I updated the router firmwere , and voila!
Now everithing working fine and good.