RTP300 FW 3.1.27 - Turning NAT/FW OFF to bypass NAT P2P problems

Hi,
I am using VoIP router RTP300 FW 3.1.27 from my ISPfo IP telephony.
I have only 1 PC behind.
First I tried DMZ mode, until get familiar with port forwarding.
Then I turned DMZ off, forwarding ports.
I have NAT feature ON, having protection of its builtin firewall.
Using P2P ( especially emule suffers ), there occurs NAT table long expiration issues,getting applications into troubles. So do connecting by UltraVNC from outside. router need to be restarted 1-2 times per day, if emule is running.
uTorrent and StrongDC are not so critical.  Emule uses many UDP stateless connections that probably leads NAT table into troubles.
I tried turn NAT/FW OFF, rebooted the router and  I lost connectivity.
Later I had idea if NAT is OFF, maybe it is like DMZ + transparent mode and does not translate IP to/from LAN 192.168.15.x range.
Even if I tried to set my PC to my WAN public IP, i did not help.
There was msg about IP conflict - router was obviously keeping WAN IP for itself.
Well, I did not change port forwarding table, thinking it will be ignored, similarly as in DMZ mode.
What I am  doing wrong or how to set router and PC properly ?
Should it be bot DMZ and NAT OFF ?
Poutnik
Message Edited by Libor on 10-25-2008 09:31 AM

i am afraid that not. 
I have no problems to get connected, ports are forwarded well for emule, utorrent and Strong DC too.
NAT is IMHO active  in both DMZ and PortForwarding modes in general, otherwise local lan would not work well.
The problem is , mentioned more times on more places, that some routers have long expiration for TCP connections in wait to close state and for stateless UDP.  It is said up to 5 days.
After some time running P2P with kademlia UDP network NAT table said to have about 2048 items gets exhausted and become difficult for new connection to get a place there.
Some users say they need to reboot router 1-3 times day.I myseld have similar at least daily reboot experiency. After router reboot things go well again.
I thought turning NAT OFF , having the only PC, would help.
Message Edited by Libor on 10-27-2008 01:39 PM
Message Edited by Libor on 10-27-2008 01:43 PM

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