A Technical Guide to IPSec Virtual Private Networks

Appendix

Etherpeek IKE Decode

IPSEC.TXT

DCod Src ISAKMP;

• DWRD 0 1 90 c2 Destination Port:;
• CST# ffffffff 1 0 14 UDP/TCP Port Names;
• TNXT 0 0 0 0 ISAKMP UDP;

DCod ISAKMP UDP;

• DWRD 0 f 90 c2 Length:;
• HWRD 0 0 90 c2 Checksum:;
• CKSM 3 0 24 14 Checksum invalid. Should be:;
• LABL 0 0 0 b1 ISAKMP Header;
• HEX# 8 0 90 c2 Initiator cookie:;
• HEX# 8 0 90 c2 Responder cookie:;
• * store the next payload in ‘d’
• DBYT 0 d 90 c2 Next Payload:;
• CST# ffffffff d 0 14 ISAKMP Payloads;
• HBYT 0 0 90 c2 Version:;
• DBYT 0 c 90 c2 Exchange Type:;
• CST# ffffffff c 0 14 ISAKMP Exch Type;
• BBIT 5 0 90 c2 Other Flags:;
• BBIT 1 0 90 c2 Authentication Only Flag:;
• BBIT 1 0 90 c2 Commit Flag:;
• BBIT 1 2 90 c2 Encryption Flag:;
• DLNG 0 0 90 c2 Message ID:;
• * Length of total message ...