NAT negotiation failed!

[Gallantide]

I get this message whenever I try to join an online game. Why is this happening and how do I get rid of it?

Thanks in advance

[robinhood]

u must be behind a firewall.

[danes]

yes. you're probably behind a firewall. Either windows firewall, a 3rd party firewall software (like zonealarm or norton) or maybe your router's firewall. try and test the first 2 options first. disable them temporarily and see if you get in.

[Gallantide]

Thank you both, I will try that. But how do I detect a firewalls on my computer? I've installed a couple over the years but don't know which ones are still activated.

Thanks again!

EDIT: I deleted Windows firewall and Nvdia firewall, but I am still getting the same error message. Any other suggestions?

[Gallantide]

I reinstalled my firewall and I am still getting NAT negotiation failed message whenever I try to join an online game. Do I have to configure my modem a certain way? Thanks

[Gallantide]

I opened the port that was in my preferece file (27750) and I'm still unable to join any game. Is there a list of possible ports that gamespy uses? This is really frustrating
Thanks

[Gallantide]

bump

[DarK_RTW]

List of ports that should be open :

* 27750 (Medieval II - Total War)
* 6667 (IRC)
* 3783 (Voice Chat Port)
* 27900 (Master Server UDP Heartbeat)
* 28900 (Master Server List Request)
* 29900 (GP Connection Manager)
* 29901 (GP Search Manager)
* 13139 (Custom UDP Pings)
* 6515 (Dplay UDP)
* 6500 (Query Port)

[{nF}remix]

Are those TCP or UDP ports?

Thanks

[Gallantide]

Thank you, DarK_RTW.

[name]

I have the same problem, opening the ports did NOT solve it.
I found the solution, it was Hamachi, just disable the hamachi network device.

[Mr. Os]

arg! I keep getting these! i need help.

[Armatus]

Are those TCP or UDP ports?

Thanks

It shouldn't matter as you should be able to open a generic range of ports.

[Juliuscivilus]

arg! I keep getting these! i need help.

set up a static ip

[Armatus]

set up a static ip

I'd go with port triggering if at all possible, that way you keep a dynamic IP.

[tlatoani]

aaah i jave the same problem i disabled hamachi and opened the ports but i still cant join any game

[tlatoani]

oh forget it i saw the solution it was just adding ur ip to the preferences file in medieval 2 hehehe today i just played with some guys BC sod but my light went off when playing the second battle -_-

[Armatus]

you got to play BC online? Wow I'm really jealous

[SgtPepper1217]

Ok....More NAT Issues.

I did all of the above to fix NAT; thanks so much it fixed it for EVERY server except for one....

When I try to play my friend online, it always says "NAT....." when HE tries to join MY hosted game, and when I try to join HIS hosted game.

Does anyone know how to solve private NAT issues between two individual hosts?

Thanks in advance

[Armatus]

so you opened the ports?