04-11-2008 06:48 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 67.69.184.199 67.69.184.7
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80
04-11-2008 07:03 AM
The problem is in your crypto ACL and no-nat ACL. Change the ACL configuration as follows. Use a static IP address for the servers in the range of 192.168.1.33 - 254. Do not use a static address in the DHCP range as that would cause duplicate addresses usage in the network.
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
HTH
Sundar
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