Pix-Watchguard Multiple VPN Tunnel Problem

[TheStressFactor]

Hello all,

We have had a vpn tunnel from our pix 515e to our watchguard soho unti set up for awhile now and it has worked pretty much flawlessy over the last severla months.

We needed to set up a second vpn tunnel to a new remote office to another watchguard unit(Firebox 700) and the configuration set-up was pretty much similar.

What seems to be happening now that we set up the second tunnel is that the two tunnels are taking turns being active. Meaning, at times the inital vpn tunnel works while the second one does not. Then all of a sudden the new vpn tunnel goes up and the initial tunnel drops. I have posted our config bewlo. Any help, advice, or suggestions would be greatly appreciated.

PIX Version 6.2(2)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 intf2 security10
enable password
passwd
hostname mypix
domain-name mypix.com
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol ils 389
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sqlnet 1521
fixup protocol sip 5060
fixup protocol skinny 2000
no fixup protocol smtp 25
no fixup protocol http 80
names
access-list nonat permit ip 192.168.3.0 255.255.255.0 10.1.1.0 255.255.255.0
access-list nonat permit ip 192.168.3.0 255.255.255.0 192.168.77.0 255.255.255.0

access-list nonat permit ip 192.168.5.0 255.255.255.0 192.168.77.0 255.255.255.0

access-list nonat permit ip 192.168.4.0 255.255.255.0 192.168.77.0 255.255.255.0

access-list nonat permit ip 192.168.1.0 255.255.255.0 192.168.77.0 255.255.255.0

access-list nonat permit ip 192.168.0.0 255.255.255.0 192.168.77.0 255.255.255.0

access-list nonat permit ip 192.168.3.0 255.255.255.0 192.168.20.0 255.255.255.0

access-list nonat permit ip 192.168.1.0 255.255.255.0 192.168.20.0 255.255.255.0

access-list nonat permit ip 192.168.0.0 255.255.255.0 192.168.20.0 255.255.255.0

access-list nonat permit ip 192.168.5.0 255.255.255.0 192.168.20.0 255.255.255.0

access-list nonat permit ip 192.168.4.0 255.255.255.0 192.168.20.0 255.255.255.0

access-list split permit ip 192.168.3.0 255.255.255.0 10.1.1.0 255.255.255.0
access-list tunnel permit ip 192.168.3.0 255.255.255.0 192.168.77.0 255.255.255.
0
access-list tunnel permit ip 192.168.5.0 255.255.255.0 192.168.77.0 255.255.255.
0
access-list tunnel permit ip 192.168.4.0 255.255.255.0 192.168.77.0 255.255.255.
0
access-list tunnel permit ip 192.168.1.0 255.255.255.0 192.168.77.0 255.255.255.
0
access-list tunnel permit ip 192.168.0.0 255.255.255.0 192.168.77.0 255.255.255.
0
access-list tunnel permit ip 192.168.77.0 255.255.255.0 192.168.3.0 255.255.255.
0

access-list GRIFFIN permit ip 192.168.3.0 255.255.255.0 192.168.20.0 255.255.255
.0
access-list GRIFFIN permit ip 192.168.5.0 255.255.255.0 192.168.20.0 255.255.255
.0
access-list GRIFFIN permit ip 192.168.4.0 255.255.255.0 192.168.20.0 255.255.255
.0
access-list GRIFFIN permit ip 192.168.1.0 255.255.255.0 192.168.20.0 255.255.255
.0
access-list GRIFFIN permit ip 192.168.0.0 255.255.255.0 192.168.20.0 255.255.255
.0
access-list GRIFFIN permit ip 192.168.20.0 255.255.255.0 192.168.3.0 255.255.255
.0
pager lines 24
logging on
logging timestamp
logging host inside 192.168.3.44 6/1470
interface ethernet0 100basetx
interface ethernet1 100basetx
interface ethernet2 auto shutdown
mtu outside 1500
mtu inside 1500
mtu intf2 1500
ip address outside
ip address inside 192.168.3.1 255.255.255.0
ip address intf2 127.0.0.1 255.255.255.255
ip verify reverse-path interface outside
ip verify reverse-path interface inside
ip audit info action alarm
ip audit attack action alarm
ip local pool ippool 10.1.1.1-10.1.1.50
pdm location 192.168.0.0 255.255.255.0 inside
pdm location 192.168.1.0 255.255.255.0 inside
pdm location 192.168.3.2 255.255.255.255 inside
pdm location 192.168.4.0 255.255.255.0 inside
pdm location 192.168.5.0 255.255.255.0 inside
pdm location 63.102.156.65 255.255.255.255 inside
pdm location 192.168.3.9 255.255.255.255 inside
pdm location 192.168.3.4 255.255.255.255 inside
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list nonat
nat (inside) 1 192.168.0.0 255.255.255.0 0 0
nat (inside) 1 192.168.1.0 255.255.255.0 0 0
nat (inside) 1 192.168.3.0 255.255.255.0 0 0
nat (inside) 1 192.168.4.0 255.255.255.0 0 0
nat (inside) 1 192.168.5.0 255.255.255.0 0 0
access-group outside in interface outside
route outside 0.0.0.0 0.0.0.0
route inside 192.168.0.0 255.255.255.0 192.168.3.6 1
route inside 192.168.1.0 255.255.255.0 192.168.3.6 1
route inside 192.168.4.0 255.255.255.0 192.168.3.6 1
route inside 192.168.5.0 255.255.255.0 192.168.3.6 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 si
p 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
url-server (inside) vendor websense host 192.168.3. timeout 5 protocol TCP vers
ion 4
http server enable
http 192.168.3.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
no sysopt route dnat
crypto ipsec transform-set pixtransform esp-3des esp-sha-hmac
crypto ipsec transform-set marinohome esp-des esp-md5-hmac
crypto ipsec transform-set GRIFFIN esp-3des esp-sha-hmac
crypto dynamic-map dynmap 10 set transform-set marinohome
crypto map testmap 10 ipsec-isakmp
crypto map testmap 10 match address tunnel
crypto map testmap 10 set peer x.x.x.x
crypto map testmap 10 set transform-set pixtransform
crypto map testmap 10 set security-association lifetime seconds 3600 kilobytes 8
192
crypto map testmap 20 ipsec-isakmp
crypto map testmap 20 match address GRIFFIN
crypto map testmap 20 set pfs
crypto map testmap 20 set peer x.x.x.x
crypto map testmap 20 set transform-set GRIFFIN
crypto map testmap 20 set security-association lifetime seconds 3600 kilobytes 8
192
crypto map testmap 999 ipsec-isakmp dynamic dynmap
crypto map testmap interface outside
crypto map marinohome 10 ipsec-isakmp dynamic dynmap
isakmp enable outside
isakmp key ******** address x.x.x.x netmask x.x.x.x
isakmp key ******** address x.x.x.x netmask x.x.x.x
isakmp identity address
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption des
isakmp policy 10 hash md5
isakmp policy 10 group 2
isakmp policy 10 lifetime 86400
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption 3des
isakmp policy 20 hash sha
isakmp policy 20 group 1
isakmp policy 20 lifetime 86400
vpngroup address-pool ippool
vpngroup dns-server 192.168.3.
vpngroup wins-server 192.168.3.
vpngroup default-domain mydomain.com
vpngroup split-tunnel split
vpngroup idle-time 2000
vpngroup password ***********

 

[yizhar]

HI.

I would have reconfigure all access-list statements.
You have some unneeded statements like the following:
> access-list tunnel permit ip 192.168.77.0 255.255.255.0 192.168.3.0 255.255.255.0
> access-list GRIFFIN permit ip 192.168.20.0 255.255.255.0 192.168.3.0 255.255.255.0

This should be removed because:
A. They might be causing the problem.
B. They are not needed.
In the access-list for "nat 0" and for "crypto map", you should only specify traffic from your network to the other (and NOT the other way).

You can also improve access-list usage by "supernet" of subnets, like the following:
192.168.0.0 255.255.248.0
Instead of:
192.168.0.0 255.255.255.0
192.168.1.0 255.255.255.0
...
192.168.7.0 255.255.255.0
etc...


Here is a sample replacement for your config:

access-list nonat permit ip 192.168.0.0 255.255.248.0 10.1.1.0 255.255.255.0
access-list nonat permit ip 192.168.0.0 255.255.248.0 192.168.77.0 255.255.255.0
access-list nonat permit ip 192.168.0.0 255.255.248.0 192.168.20.0 255.255.255.0

access-list tunnel permit ip 192.168.0.0 255.255.248.0 192.168.77.0 255.255.255.0

access-list GRIFFIN permit ip 192.168.0.0 255.255.248.0 192.168.20.0 255.255.255.0

You should also try using syslog messages and debug commands to get more info.

Bye


Yizhar Hurwitz

http://come.to/yizhar

http://teachers.sivan.co.il/yizhar