04-11-2008 06:49 AM - edited 02-21-2020 01:58 AM
We are running a PIX 501 (6.3)
We have it set up as a firewall/vpn router on a DSL modem.
We have several computer on the inside interface, IP range 192.168.1.0
The PIX is set to give out DHCP address from 192.168.1.2 to .33
If the PIXs gives a computer an IP via DHCP outside VPN clients can contact it. If the computer self assigns its IP, either in the DHCP range or outside it, none of the VPN Clients can get to it.
This is Bad. I have several servers that need to be VPN accessible, and can not put them on DHCP and have their IPs change constantly.
Please help, I'm pulling my hair out.
Here is my config:
PIX Version 6.3(5)
interface ethernet0 100full
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password XXXXXXX encrypted
passwd XXXXXXX encrypted
hostname XXXX
domain-name xxxxx
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
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
fixup protocol tftp 69
names
access-list nonat permit ip 192.168.1.0 255.255.255.224 192.100.1.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit icmp any any
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.224 192.100.1.0 255.255.255.0
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside pppoe setroute
ip address inside 192.168.1.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool ippool 192.100.1.200-192.100.1.220
pdm location 192.168.1.0 255.255.255.224 inside
pdm location 192.100.1.0 255.255.255.0 outside
pdm location 0.0.0.0 255.255.255.255 inside
pdm location 192.168.1.0 255.255.255.255 inside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list nonat
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
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 192.168.1.0 255.255.255.0 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-sha esp-aes-256 esp-sha-hmac
crypto dynamic-map dynmap 20 set transform-set ESP-3DES-sha
crypto map outside_map 500 ipsec-isakmp dynamic dynmap
crypto map outside_map interface outside
isakmp enable outside
isakmp nat-traversal 20
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 maxhrvpn address-pool ippool
vpngroup maxhrvpn dns-server 67.69.184.199 67.69.184.7
vpngroup maxhrvpn split-tunnel outside_cryptomap_dyn_20
vpngroup maxhrvpn idle-time 1800
vpngroup maxhrvpn password ********
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 5
ssh 192.168.1.0 255.255.255.0 inside
ssh timeout 5
management-access inside
console timeout 0
vpdn group pppoex request dialout pppoe
vpdn group pppoex localname maxx9429@bellnet.ca
vpdn group pppoex ppp authentication pap
vpdn username xxxxxxx password *********
dhcpd address 192.168.1.2-192.168.1.33 inside
dhcpd dns 67.x.x.199 67.69.184.7
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80
Solved! Go to Solution.
04-11-2008 10:44 AM
Whenever you remove your nonat acl, the nat (inside) 0 access-list nonat command will be removed. You need to add it back.
nat (inside) 0 access-list nonat
04-11-2008 06:56 AM
Check your mask on your nat exemption and crypto acl.
access-list nonat permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
Make sure the computers you are hardcoding ip's on have the correct gateway.
04-11-2008 07:14 AM
should the mask of the external IP Pool (192.168.100.1) match the size of our pool, 32 addresses?
If the mask were wrong, wouldn't connections fail to everything?
the clients inside are getting a 192.168.1.1 gateway either manually or by DHCP.
Thanks
04-11-2008 07:17 AM
"should the mask of the external IP Pool (192.168.100.1) match the size of our pool, 32 addresses?"
-Shouldn't matter, either way is fine. The problem is your initial acl's had a mask which would only allow 192.168.1.0 255.255.255.224 to be reached by the vpn clients.
Also, your external pool isn't 192.168.100.1, it's 192.100.1.0.
04-11-2008 07:29 AM
OK now it reads:
access-list nonat permit ip 192.168.1.0 255.255.255.224 192.168.100.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit icmp any any
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.168.100.0 255.255.255.0
I have a system at 192.168.1.21 with a gateway of 192.168.1.1 and it is still not pingable from 192.168.100.0
Thanks for the help.
04-11-2008 07:33 AM
I meant:
access-list nonat permit ip 192.168.1.0 255.255.255.224 192.168.100.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit icmp any any
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.168.100.0 255.255.255.0
04-11-2008 07:38 AM
I thought your pool was 192.100.1.0? If so it should read...
access-list nonat permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
You don't need the icmp in your crypto acl.
04-11-2008 07:53 AM
Still not there..
Will taking out the icmp disable ping?
It now reads:
PIX Version 6.3(5)
interface ethernet0 100full
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password xxx
passwd xxx
hostname gozar
domain-name xxxxxx
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
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
fixup protocol tftp 69
names
name 192.168.1.7 tftp-host
access-list nonat permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside pppoe setroute
ip address inside 192.168.1.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool ippool 192.168.100.200-192.168.100.220
pdm location 192.168.1.0 255.255.255.224 inside
pdm location 0.0.0.0 255.255.255.255 inside
pdm location 192.168.1.0 255.255.255.255 inside
pdm location 68.50.110.0 255.255.255.0 outside
pdm location 68.50.110.165 255.255.255.255 inside
pdm location 68.50.110.165 255.255.255.255 outside
pdm location 192.168.100.0 255.255.255.0 outside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
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 0.0.0.0 0.0.0.0 outside
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
tftp-server inside tftp-host pixflash
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set ESP-3DES-sha esp-aes-256 esp-sha-hmac
crypto dynamic-map dynmap 20 set transform-set ESP-3DES-sha
crypto map outside_map 500 ipsec-isakmp dynamic dynmap
crypto map outside_map interface outside
isakmp enable outside
isakmp nat-traversal 20
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 maxvpn address-pool ippool
vpngroup maxvpn dns-server 67.69.184.199
vpngroup maxvpn idle-time 1800
vpngroup maxvpn password ********
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 5
ssh 192.168.1.0 255.255.255.0 inside
ssh timeout 5
management-access inside
console timeout 0
vpdn group pppoex request dialout pppoe
vpdn group pppoex localname maxx9429@bellnet.ca
vpdn group pppoex ppp authentication pap
vpdn username xxxxxx password ********
dhcpd address 192.168.1.2-192.168.1.33 inside
dhcpd dns 67.69.184.199 67.69.184.7
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80
Cryptochecksum:xxx
04-11-2008 07:58 AM
You're missing...
nat (inside) 0 access-list nonat
"Will taking out the icmp disable ping?"
-No.
04-11-2008 08:56 AM
Thanks for all your help.
I'm still not there yet.
The Nats read:
nat (inside) 0 access-list nonat
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
The Access list reads:
access-list nonat permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
Does the order matter?
how about the pdm entries:
pdm location 192.168.1.0 255.255.255.224 inside
pdm location 0.0.0.0 255.255.255.255 inside
pdm location 192.168.1.0 255.255.255.255 inside
pdm location 68.50.110.0 255.255.255.0 outside
pdm location 68.50.110.165 255.255.255.255 inside
pdm location 68.50.110.165 255.255.255.255 outside
pdm location 192.168.100.0 255.255.255.0 outside
04-11-2008 09:25 AM
Same problems as before?
Acl's look fine, order doesn't matter. PDM entries don't matter either.
You left off your split tunnel...
vpngroup maxhrvpn split-tunnel outside_cryptomap_dyn_20
04-11-2008 10:04 AM
Hmm. I added the split tunnel. Now I can only ping 192.168.1.1 and nothing else.
How does the split tunnel work? Do I need to send routing down to the client.
04-11-2008 10:15 AM
All the split tunnel says is "This is the traffic I want to be tunneled, or part of the vpn". So in your case it would be what you defined here...
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
Post your new config.
04-11-2008 10:21 AM
Here it is:
PIX Version 6.3(5)
interface ethernet0 100full
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password xxxx encrypted
passwd xxxx encrypted
hostname gozar
domain-name xxxxx
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
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
fixup protocol tftp 69
names
name 192.168.1.7 tftp-host
access-list nonat permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside pppoe setroute
ip address inside 192.168.1.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool ippool 192.168.100.200-192.168.100.220
pdm location 192.168.1.0 255.255.255.224 inside
pdm location 0.0.0.0 255.255.255.255 inside
pdm location 192.168.1.0 255.255.255.255 inside
pdm location 68.50.110.0 255.255.255.0 outside
pdm location 68.50.110.165 255.255.255.255 inside
pdm location 68.50.110.165 255.255.255.255 outside
pdm location 192.168.100.0 255.255.255.0 outside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list nonat
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
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 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
tftp-server inside tftp-host pixflash
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set ESP-3DES-sha esp-aes-256 esp-sha-hmac
crypto dynamic-map dynmap 20 set transform-set ESP-3DES-sha
crypto map outside_map 500 ipsec-isakmp dynamic dynmap
crypto map outside_map interface outside
isakmp enable outside
isakmp nat-traversal 20
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 maxvpn address-pool ippool
vpngroup maxvpn dns-server 67.69.184.199
vpngroup maxvpn idle-time 1800
vpngroup maxvpn password ********
vpngroup maxhrvpn split-tunnel outside_cryptomap_dyn_20
vpngroup maxhrvpn idle-time 1800
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 5
ssh 192.168.1.0 255.255.255.0 inside
ssh timeout 5
management-access inside
console timeout 0
vpdn group pppoex request dialout pppoe
vpdn group pppoex localname xxxxx
vpdn group pppoex ppp authentication pap
vpdn username xxxxx password ********
dhcpd address 192.168.1.2-192.168.1.33 inside
dhcpd dns 67.69.184.199 67.69.184.7
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80
04-11-2008 10:27 AM
You changed your pool!
ip local pool ippool 192.168.100.200-192.168.100.220
should be...
ip local pool ippool 192.100.1.200-192.100.1.220
Keeping my fingers crossed.
Just so you understand, the pool needs to be reflected in your nonat and split tunnel acl's. So it could be...
access-list nonat permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.100.1.0 255.255.255.0
ip local pool ippool 192.100.1.200-192.100.1.220
or...
access-list nonat permit ip 192.168.1.0 255.255.255.0 192.168.100.0 255.255.255.0
access-list outside_cryptomap_dyn_20 permit ip 192.168.1.0 255.255.255.0 192.168.100.0 255.255.255.0
ip local pool ippool 192.168.100.200-192.168.100.220
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