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09.27.2007 at 10:30AM PDT, ID: 22857324
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7.4

PIX 506 LAN IPs conflict with LAN IPs on other side of client VPN

Asked by PlusInc in Virtual Private Networking (VPN), Cisco PIX Firewall

Tags: , , ,

I'm sure someone can help with this... I browsed the forum but did not find exactly what I was looking for...

Here's the situation... I have a PIX 506 setup to accept Cisco VPN client connections.  And it does.
It assigns the users an IP from my pool.

Problem is... there's a conflict.

LAN behind PIX:
192.168.0.x

LAN at VPN user's sites are often 192.168.0.x and I can't change them our side either one....

I have tried changing the VPN pool to issue 192.169.0.100 - 192.169.0.150
and changed the split tunneling around, but that didn't work.

What I need is for these people at remote locations to be able to see the computers on the LAN at the work site with the PIX regardless of what IP range their LAN uses...  Here's the config:

PIX Version 6.3(5)

<much deleted>

access-list outside_access_in permit icmp any any echo-reply

access-list outside_access_in permit tcp any any eq pptp
access-list inside_outbound_nat0_acl permit ip any 192.168.0.128 255.255.255.192
access-list outside_cryptomap_dyn_20 permit ip any 192.168.0.128 255.255.255.192
access-list outside_cryptomap_dyn_20 permit ip any 192.169.0.0 255.255.0.0
access-list outside_cryptomap_dyn_20 permit ip any 192.168.0.0 255.255.0.0
access-list greenco_splitTunnelAcl permit ip 192.169.0.0 255.255.0.0 any
access-list greenco_splitTunnelAcl permit ip 192.168.0.0 255.255.255.0 any
icmp permit any outside
icmp permit any inside
ip address outside 65.23.1xx.1x 255.255.255.248
ip address inside 192.168.0.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool vpn 192.168.0.151-192.168.0.175
ip local pool vpn2 192.169.0.100-192.169.0.150
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
static (inside,outside) tcp interface pptp 192.168.0.213 pptp netmask 255.255.255.255 0 0
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 65.23.11x.10x 1
timeout xlate 0:05:00
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 sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
http server enable
http 192.168.0.0 255.255.255.0 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 dynamic-map outside_dyn_map 20 match address outside_cryptomap_dyn_20
crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map interface outside
isakmp enable outside
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption 3des
isakmp policy 20 hash md5
isakmp policy 20 group 2
isakmp policy 20 lifetime 86400
vpngroup greenco address-pool vpn
vpngroup greenco dns-server 64.89.70.2 64.89.74.2
vpngroup greenco wins-server 192.168.0.213
vpngroup greenco default-domain nuvox.net
vpngroup greenco split-tunnel greenco_splitTunnelAcl
vpngroup greenco idle-time 1800
vpngroup greenco password ********
telnet 0.0.0.0 0.0.0.0 outside
telnet 0.0.0.0 0.0.0.0 inside
telnet timeout 50
ssh 0.0.0.0 0.0.0.0 outside
ssh 0.0.0.0 0.0.0.0 inside
ssh timeout 60
console timeout 0
dhcpd address 192.168.0.100-192.168.0.150 inside
dhcpd dns 64.89.70.2 64.89.74.2
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80

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[+][-]09.27.2007 at 10:32AM PDT, ID: 19973099

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[+][-]09.27.2007 at 10:33AM PDT, ID: 19973104

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[+][-]09.27.2007 at 12:01PM PDT, ID: 19973838

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[+][-]09.27.2007 at 12:14PM PDT, ID: 19973925

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[+][-]09.28.2007 at 12:44PM PDT, ID: 19981250

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About this solution

Zones: Virtual Private Networking (VPN), Cisco PIX Firewall
Tags: pix, vpn, lan, 506
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Solution Provided By: brich330
Participating Experts: 2
Solution Grade: A
 
 
[+][-]09.28.2007 at 01:48PM PDT, ID: 19981675

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20080716-EE-VQP-32 / EE_QW_2_20070628