After upgrading our pix 515 firewall from 6.3(1) to 7.2(1) I've problems with dynamic l2l vpns. All vpns which are defined with a static peer ip in the crypto map and the vpn client configuration are working fine, but all previous working dynamic map entries will fail because of a phase 2 mismatch:
[IKEv1]: Group = DefaultL2LGroup, IP = 184.108.40.206, IKE Remote Peer configured for crypto map: DYNMAP
[IKEv1 DEBUG]: Group = DefaultL2LGroup, IP = 220.127.116.11, processing IPSec SA payload
[IKEv1]: Group = DefaultL2LGroup, IP = 18.104.22.168, All IPSec SA proposals found unacceptable!
It looks like the match adress statement in the dynamic-map configuration doesn't work, but the access-lists are configured correct.
access-list VPN-CLIENT extended permit ip any 10.0.0.0 255.255.255.0
access-list HOMEOFFICE01 extended permit ip 192.168.1.0 255.255.255.0 192.168.203.0 255.255.255.0
access-list vpn-branch01 extended permit ip 192.168.1.0 255.255.255.0 192.168.110.0 255.255.255.0
no sysopt connection permit-vpn
crypto ipsec transform-set DES esp-des esp-md5-hmac
" All IPSec SA proposals found unacceptable " the error means that during the negotiation process, it is hunting down the list of available proposals and is unable to find one that matches what the remote end wants to do. This could be anything from mis-matched hash, mis-matched encryption settings, pfs not turned off (sha instead of md-5, des instead of 3des, pfs enabled instead of disabled.....). This could also be the result of the rules defining interesting traffic not mirroring the other end exactly.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...