[Serusers] nat_uac_test

I am using nat_uac_test("2") to only select UAs behind NAT that may need NAThelper assistance. However I find that natt_uac_test("2") is also giving a positive on some ATA's that we have setup with port forwarding or DMZ. These ATA have also been set to determine the external IP of the routers they are on using VIA - They function without the nathelper module. These UA do not need any help from NAT helper but because they are flaged they are pinged to keeps ports alive and they are forced through the RTPProxy. Any Ideas. We know in advance which UA are setup with Port Forwarding/DMZ. Can a flag be set in the subscriber table which is also tested at the time of Registration if so, how? if (nat_uac_test("2")) { if (method == "REGISTER" || ! search("^Record-Route:")) { fix_nated_contact(); # Rewrite contact with source IP of signalling if (method == "INVITE") { fix_nated_sdp("1"); # Add direction=active to SDP }; force_rport(); # Add rport parameter to topmost Via setflag(6); # Mark as NATed }; }; Thanks, Dinesh