Skip to main content Datatracker Groups By area/parent Apps & Realtime General Internet Ops & Management Routing Security Web and Internet Transport IESG IAB IRTF IETF LLC RFC Editor Other Active AGs Active Areas Active Directorates Active IAB Workshops Active Programs Active RAGs Active Teams New work Chartering groups BOFs BOF Requests Other groups Concluded groups Non-WG lists Documents Search Recent I-Ds Submit an Internet-Draft RFC streams IAB IRTF ISE Editorial Subseries STD BCP FYI Meetings Agenda Materials Floor plan Registration Important dates Request a session Session requests Upcoming meetings Upcoming meetings Past meetings Past meetings Meeting proceedings Other IPR disclosures Liaison statements IESG agenda NomComs Downref registry Statistics I-Ds/RFCs Meetings API Help Release notes System status Report a bug User Sign in Password reset Preferences New account List subscriptions IETF Lists IRTF Lists IAB Lists RFC-Editor Lists Report a bug Sign in Javascript disabled? Like other modern websites, the IETF Datatracker relies on Javascript. Please enable Javascript for full functionality. Sangdo Lee RFCs (0) Sangdo has no RFCs as of 2026-03-23. Active Internet-Drafts (0) Sangdo has no active Internet-Drafts as of 2026-03-23. Expired Internet-Drafts (1) draft-lee-ipsec-nat-pt-applicability (Excluding replaced Internet-Drafts.) Internet-Draft Activity
