Firewall Wizards mailing list archives
PPP Encryption ?(was old thread Gauntlet & NTLM)
From: Phil Cox <pcc () llnl gov>
Date: Mon, 27 Oct 1997 12:09:28 -0800
I have been asking on the ntsecurity mailing list about PPTP (specifically), and the encryption portion. I read the spec, which refered to PPP for the encryption portion. I then read the PPP RFC, and saw NO reference to encryption, only compression. I receive the following responses, and it is only muddying the water :
From ntsecurity:
AFAIK PPTP uses MPPE and there is some weird use of the compression field.
From the past mail thread on wizards:
The draft does not mention encryption because the encryption is not PPTP-specific. PPTP tunnels PPP frames, and PPP has its own ways to do encryption. MPPE is a non-standard one, but others can be added. Single DES is standardized, for instance. There's also an RFC that explains how to add proprietary schemes. The current RFCs for PPP encryption are somewhat limited, you get DES and triple DES. That's about it. SO my question (statement) is: PPTP draft points to PPP for the encryption support. The PPP RFC does NOT address encryption. There are other RFC's (i.e. MPPE) which use the PPP compression field to support encryption over PPP links. Please someone correct any problems with the above statement. TIA, Phil Cox - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Computer Incident Advisory Capability (CIAC) Philip C. Cox (510)422-8193 (510)422-8564 ciac () llnl gov pcc () llnl gov ------------------------------------------------------------------- PGP Fingerprint : F76C F6B8 E2D4 7796 119A 6263 89A9 3714 E646 93CC
Current thread:
- PPP Encryption ?(was old thread Gauntlet & NTLM) Phil Cox (Oct 27)
- Re: PPP Encryption ?(was old thread Gauntlet & NTLM) Aleph One (Oct 30)