Hi, I have a "NAT situation":). My FS machine is not behind NAT, but one of the softphones (Twinkle) is. It registers correctly, but after viewing registrations on the profile I do not see any NAT-related info in Contact header. I cannot dial to this extension, I get this after ~30sec: -ERR RECOVERY_ON_TIMER_EXPIRE The interesting thing is that when I execute this command: acl <external IP of network with Twinkle> localnet.auto it returns true. I tried removing this line from profile configuration, but it did not change anything: <param name="local-network-acl" value="localnet.auto"/>. I also defined my own ACL <list name="nat.twinkle" default="allow"> <node type="allow" cidr="<IP>/32"/> </list> and applied it to the profile: <param name="apply-nat-acl" value="nat.twinkle"/> Still - no luck. I even tried to enable aggressive-nat-detection even though it's not recommended, but I did not change anything. I restarted FS after each configuration modification, then flushed all registrations on the profile and re-registered my softphones. How else can I try to solve this issue? And one more question: is there any way to view the autogenerated ACLs localnet.auto and nat.auto ? Best regards, Maciej Aniserowicz