topic PIX Remote Access VPN in Network Security

PIX Remote Access VPN

alyasrazzaq — Mon, 11 Mar 2019 13:16:43 GMT

Hi,

I have setup a PIX 515 running v803 for remote access from a VPN client. I cyrrently have site-to-site VPN's which have been setup and work fine. Currently, when i connect using the VPN client (v5), although Phase 1 completes Phase 2 does not, I just get IKE negotiation failed.

crypto dynamic-map vpnmap_dynmap 5 set transform-set TRANS_ESP_3DES_MD5

crypto dynamic-map vpnmap_dynmap 15 set transform-set ESP-3DES-SHA

crypto dynamic-map vpnmap_dynmap 30 set transform-set ESP-DES-MD5

crypto dynamic-map vpnmap_dynmap 40 set transform-set ESP-DES-SHA

crypto dynamic-map vpnmap_dynmap 50 set pfs

crypto dynamic-map vpnmap_dynmap 50 set transform-set ESP-3DES-SHA

crypto map vpnmap 65535 ipsec-isakmp dynamic vpnmap_dynmap

crypto isakmp enable outside

crypto map vpnmap interface outside

group-policy client_vpn_access internal

group-policy client_vpn_access attributes

vpn-tunnel-protocol IPSec

dns-server value 10.1.1.1

tunnel-group client_vpn_access type remote-access

tunnel-group client_vpn_access general-attributes

default-group-policy client_vpn_access

address-pool client_vpn_access

tunnel-group client_vpn_access ipsec-attributes

pre-shared-key presharedkey

#### Log from Cisco VPN Client v5 ####

445 21:12:12.686 07/18/08 Sev=Info/4 CM/0x6310000E

Established Phase 1 SA. 1 Crypto Active IKE SA, 1 User Authenticated IKE SA in the system

467 21:12:12.766 07/18/08 Sev=Info/4 IKE/0x63000014

RECEIVING <<< ISAKMP OAK INFO *(HASH, NOTIFY:NO_PROPOSAL_CHOSEN) from x.x.x.x

470 21:12:12.766 07/18/08 Sev=Info/4 IKE/0x63000017

Marking IKE SA for deletion (I_Cookie=29790EF2FE6728A8 R_Cookie=D4C90BEBCF7838BE) reason = DEL_REASON_IKE_NEG_FAILED

545 21:46:40.379 07/18/08 Sev=Info/4 CM/0x63100012

Phase 1 SA deleted before first Phase 2 SA is up cause by "DEL_REASON_IKE_NEG_FAILED". 0 Crypto Active IKE SA, 0 User Authenticated IKE SA in the system

Please can you help.

Thanks

Re: PIX Remote Access VPN

a.alekseev — Fri, 18 Jul 2008 20:01:14 GMT

deb crypto isakmp 10

deb crypto ipsec 10

Re: PIX Remote Access VPN

srue — Sat, 19 Jul 2008 02:02:22 GMT

please post your isakmp policies

sh run all isakmp

Re: PIX Remote Access VPN

bjssccouser — Sat, 19 Jul 2008 09:01:40 GMT

Hi,

Please find the debugs attached.

Thanks

Re: PIX Remote Access VPN

bjssccouser — Sat, 19 Jul 2008 09:02:38 GMT

crypto isakmp identity address

crypto isakmp enable outside

crypto isakmp policy 5

authentication pre-share

encryption 3des

hash md5

group 2

lifetime 86400

crypto isakmp policy 10

authentication pre-share

encryption des

hash md5

group 1

lifetime 86400

crypto isakmp policy 30

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 28800

crypto isakmp policy 40

authentication pre-share

encryption des

hash md5

group 2

lifetime 86400

crypto isakmp policy 60

authentication pre-share

encryption 3des

hash md5

group 1

lifetime 86400

crypto isakmp policy 80

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 86400

crypto isakmp policy 65535

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 86400

Re: PIX Remote Access VPN

a.alekseev — Sat, 19 Jul 2008 13:39:47 GMT

no crypto dynamic-map vpnmap_dynmap 5 set transform-set TRANS_ESP_3DES_MD5

no crypto dynamic-map vpnmap_dynmap 15 set transform-set ESP-3DES-SHA

no crypto dynamic-map vpnmap_dynmap 30 set transform-set ESP-DES-MD5

no crypto dynamic-map vpnmap_dynmap 40 set transform-set ESP-DES-SHA

crypto dynamic-map vpnmap_dynmap 50 set pfs

crypto dynamic-map vpnmap_dynmap 50 set transform-set ESP-3DES-SHA

and show me your transform-set ESP-3DES-SHA

Re: PIX Remote Access VPN

bjssccouser — Sat, 19 Jul 2008 18:28:50 GMT

Hi,

I have removed the dynamic crypto maps as above, which has resulted in the Cisco VPN client now connecting.

However, I had to also remove pfs as I am also using the PIX for L2TP/IPSEC VPN from a Windows client.

Could you explain why this wasn't working before? Shouldn't the VPN client have been presented with all the SA options and picked the one that suited it?

Thanks