"No proposal chosen" means that the encryption settings on each end
are not in sync. Yes, I know you said they're identical, but that's
what the error means and I believe it's defined in an RFC somewhere.
As cryptic as it sounds, it's being as precise as it will get without saying
something verbose like "it says use DES on this side and 3DES on the other
side and so we don't agree."
Here's the rundown of settings (cross-platform) that I know will
tangle this up:
-
preshared key vs RSA key vs certificates
-
DES vs 3DES vs (who knows what else)
-
ESP vs AH vs ESP+AH at the same time
-
Perfect forward secrecy (PFS) on vs off
-
Diffie-Hellman group for PFS (Group 1? Group 2? Group
3?)
What I've most often seen overlooked is the PFS/DH stuff.
One side has it on, the other has it off, or the two sides are using
different DH groups.
Good luck. I haven't seen one of these yet that didn't boil
down to a mismatched setting between the two sides, and that includes the
Checkpoint, NetScreen, and Cisco platforms.
Gentlemen:
I have a question for you regarding a VPN a client of mine is
attempting to set up.
Both VPNs have identical hardware (nokia 650's), identical software
(checkpoint 4.1, sp4). All encryption settings are
identical.
However, when the VPN ruleset is built, an error is seen in the log
on one end of the VPN that says "IKE log: received notification from peer,
no proposal chosen."
what is the root of errors of this nature ?
I will provide more relevant information as
necessary.
CF
Christopher A. Ferraro
Senior Systems
Engineer
Hubbard One
mobile:
www.hubbardone.com