Hi! I just trace IPSec packets with SMS Network Monitor between 2 WinNT stations with MSR IPv6 1.3 and I need some explenation. In ESP Trailer I have following trace: ESP trailer ESP Padding = 1 (0x1) ESP Pad Lenght = 2 (0x2) Next Header = 58 etc ESP Pad Lenght means that they are 2 byts of padding, where are this two bytes (is one ESP Padding?, where is the other one). Regards, Tomaz