http://bofh.i2p/Linux_Conntrack_automatic_helper_assignment_Docs
.], seq 1:157, ack 1, win 257, length 156: pptp CTRL_MSGTYPE=SCCRQ
PROTO_VER(1.0) FRAME_CAP(A) BEARER_CAP(A) MAX_CHAN(0) FIRM_REV(0) HOSTNAME() VENDOR(Microsoft)
13:15:18.498863 IP 37.29.74.109.1723 > 10.32.60.245.49223: Flags [.], ack 157, win 209, length 0
13:15:18.511886 IP 37.29.74.109.1723 > 10.32.60.245.49223: Flags [P.], seq 1:157, ack 157, win 209, length 156: pptp CTRL_MSGTYPE=SCCRP
PROTO_VER(1.0) RESULT_CODE(1) ERR_CODE(0) FRAME_CAP() BEARER_CAP() MAX_CHAN(1) FIRM_REV(1)...