I am running a Pix 501 (version 6.3(1)) and using the VPN Client (versions 3.6.4(a) and 4.0.1(Rel)) for VPN access. The clients are able to connect to the Pix, go through authentication, the client claims that the secure tunnel has been established and then 5 seconds later the tunnel is disconnected. Always 5 seconds later. The client claims that it has lost contact with the security gateway (check your network connection). Both the outside port of the Pix and the PC running the client are on the same network so there should be no routing/DSL/modem issues. This has also been tried over a DSL connection with exactly the same result.
The Pix was initially configured using the VPN wizard in the PDM. Since then the configuration has been modified to match these two documents:
How to Configure the Cisco VPN Client to PIX with AES-Cisco VPN Client: http://www.cisco.com/en/US/products/sw/secursw/ps2308/products_configuration_example09186a00801e71c0.shtml
And
Configuring Cisco Secure PIX Firewall 6.0 and Cisco VPN 3000 Clients Using IPSec-IPSec: http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a008009442e.shtml
The main difference between these documents (and the wizard configuration) seems to be the selections for the ipsec transform set. All of these configurations produce the same result at both clients even when using the wizard configuration (the wizard's configuration fails to negotiate a transform during the ISAKMP phase). The Pix configuration is included with some addresses and identification changed or removed. Debug output from the Pix and logs from both versions of the VPN client available upon request.
I have seen problems similar to this posted several times but never a solution. Any suggestions or advice are appreciated. Thank you for reading.
The config:
Building configuration...
: Saved
:
PIX Version 6.3(1)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password xxxx
passwd xxxx
hostname pixfirewall
domain-name zzz.com
clock timezone EST -5
clock summer-time EDT recurring
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol ils 389
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
names
access-list inside_outbound_nat0_acl permit ip 192.168.1.0 255.255.255.0 192.168.2.0 255.255.255.0
access-list 100 permit icmp any any echo-reply
access-list 100 permit icmp any any time-exceeded
access-list 100 permit icmp any any unreachable
pager lines 24
logging on
logging monitor debugging
logging buffered informational
icmp permit any echo outside
icmp permit any echo-reply outside
mtu outside 1500
mtu inside 1500
ip address outside 10.1.3.143 255.255.255.224
ip address inside 192.168.1.1 255.255.255.0
ip verify reverse-path interface outside
ip audit info action alarm
ip audit attack action alarm
ip local pool 3xClients 192.168.2.1-192.168.2.127
pdm location 192.168.1.96 255.255.255.224 outside
pdm location 192.168.2.0 255.255.255.0 outside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
access-group 100 in interface outside
route outside 0.0.0.0 0.0.0.0 10.1.3.129 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
http server enable
http 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec transform-set ESP-AES-MD5 esp-aes esp-md5-hmac
crypto ipsec transform-set ESP-AES-256 esp-aes-256 esp-sha-hmac
crypto dynamic-map outside_dyn_map 20 set transform-set ESP-AES-256
crypto map outside_map 20 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map client authentication LOCAL
crypto map outside_map interface outside
isakmp enable outside
isakmp identity address
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption aes-256
isakmp policy 20 hash sha
isakmp policy 20 group 2
isakmp policy 20 lifetime 86400
vpngroup HF address-pool 3xClients
vpngroup HF dns-server 192.168.1.123
vpngroup HF default-domain horstfrisch.com
vpngroup HF idle-time 1800
vpngroup HF password ********
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 5
ssh 138.0.0.0 255.0.0.0 outside
ssh timeout 5
console timeout 0
dhcpd address 192.168.1.127-192.168.1.254 inside
dhcpd dns 192.168.1.123
dhcpd lease 36000
dhcpd ping_timeout 750
dhcpd domain zzz.com
dhcpd auto_config outside
dhcpd enable inside
username xxx password xxxx
privilege 3
username xxxx password xxxx
privilege 3
… several removed …
username xxx password xxx
privilege 3
terminal width 80
Cryptochecksum:xxxx
: end
[OK]
