Change ports or map one port to another

[Lightning Forth]

well my ISP, blocks all udp ports before 37028 except 80. they drop the connection when it reaches them. as steam(dota 2 too) requires the udp ports 27000-27030, I can't play online. So I was wondering if there was any way to change the steam ports to custom ports or map the ports to those after 37028. need help please! I'm a die hard dota player and because of this problem, I can't play dota 2. :/

[RDPolarity]

Eeek!, that's not good, i don't know because i haven't played Dota 2 but a quick question, did Dota 2 work before?

[Lightning Forth]

yeah, it did. they recently blocked all those ports before 37028 :/

[RDPolarity]

:/ thinking why that happened? don't see any reason why they would block that port, are you sure its blocked or is it your router blocking it.

[Lightning Forth]

they gave official notice that they were going to close the ports. :/

[RDPolarity]

They did? well i'm still wondering why but for your problem, there is 1 problem so far that could of caused this, rather something is running on that port in the background and won't let you play that game because something is already using that port, try searching for any program that may use it. otherwise its something different.