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7.8

PIX doesn't like new external IP address

Asked by NWAtech in Cisco PIX Firewall

Tags: Cisco, PIX 506e, 6.3(5), Cisco, PIX 506e

I inherited admin for a company that has a Cisco PIX 506e in place as their firewall. The current internet provider is cable and I need to move this to DSL. I have verified with a laptop that the DSL is up and working but when I go into the pix config to change the external IP address on the outside interface along with all of the access lists and static statements that it touches I cannot browse out. This firewall does have IPSEC VPN configuration to connect to a remote site which I know I will have to change IP addresses on the remote end once I get this up and running, but I never get that far. I re-applyed the access-group statements, saved the config and rebooted after making the few changes that I made. Would you please look at my configuration to see if something jumps out as being wrong? Thanks so much for you help!

Working cable Config:

PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password xxxxxxxxxxxxxxxxx encrypted
passwd xxxxxxxxxxxxxxxx encrypted
hostname PIX
domain-name abccorp.com
fixup protocol dns maximum-length 2000
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol pptp 1723
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 192.168.1.0 remote-site
access-list 120 permit ip 192.168.0.0 255.255.255.0 192.168.0.0 255.255.255.0
access-list 120 permit ip 192.168.10.0 255.255.255.0 192.168.10.0 255.255.255.0
access-list 120 permit ip remote-site 255.255.255.0 remote-site 255.255.255.0
access-list inbound permit icmp any any
access-list inbound permit tcp any host 24.x.x.248 eq pptp
access-list inbound permit tcp any host 24.x.x.248 eq 3389
access-list inbound permit gre any host 24.x.x.248
access-list inside_outbound_nat0_acl permit ip 192.168.0.0 255.255.255.0 192.168.10.0 255.255.255.0
access-list outside_cryptomap_10 permit ip 192.168.0.0 255.255.255.0 192.168.10.0 255.255.255.0
access-list inside_outbosnd_nat0_acl permit ip 192.168.0.0 255.255.255.0 remote-site 255.255.255.0
access-list acl-out permit gre any host 24.x.x.248
access-list acl-out permit tcp any host 24.x.x.248 eq pptp
access-list acl_inside permit ip any any
pager lines 23
logging on
logging monitor debugging
logging trap debugging
logging facility 23
logging host inside 192.168.0.10
mtu outside 1500
mtu inside 1500
ip address outside 24.x.x.247 255.255.255.224
ip address inside 192.168.0.1 255.255.255.0
ip audit name ATTACKPOLICY attack action alarm drop
ip audit name INFOPOLICY info action alarm reset
ip audit interface outside INFOPOLICY
ip audit interface outside ATTACKPOLICY
ip audit interface inside INFOPOLICY
ip audit interface inside ATTACKPOLICY
ip audit info action alarm
ip audit attack action alarm
ip local pool loca 192.168.0.200-192.168.0.210 mask 255.255.255.0
pdm location 192.168.0.10 255.255.255.255 inside
pdm location 192.168.10.0 255.255.255.0 outside
pdm location 192.168.10.1 255.255.255.255 inside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list outside_cryptomap_10
nat (inside) 1 192.168.0.0 255.255.255.0 0 0
static (inside,outside) 24.x.x.248 192.168.0.10 netmask 255.255.255.255 0 0
access-group inbound in interface outside
route outside 0.0.0.0 0.0.0.0 24.x.x.225 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
sysopt connection permit-pptp
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto dynamic-map dyn 10 set transform-set ESP-DES-MD5
crypto map outside_map 10 ipsec-isakmp
! Incomplete
crypto map outside_map 6500 ipsec-isakmp dynamic dyn
crypto map outside_map interface outside
isakmp enable outside
isakmp key ******** address 0.0.0.0 netmask 0.0.0.0
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
vpngroup abccorp address-pool loca
vpngroup abccorp dns-server 192.168.0.1 192.168.0.10
vpngroup abccorp wins-server 192.168.0.10
vpngroup abccorp default-domain abccorp.com
vpngroup abccorp idle-time 1800
vpngroup dns-server idle-time 1800
telnet 192.168.0.10 255.255.255.255 inside
telnet 192.168.10.1 255.255.255.255 inside
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 outside
ssh timeout 60
management-access inside
console timeout 0
terminal width 80
: end
[OK]
PIX#
*****************************************************************************************
New Config for DSL circuit (changes only):

access-list inbound permit tcp any host 205.x.x.42 eq pptp
access-list inbound permit tcp any host 205.x.x.42 eq 3389
access-list inbound permit gre any host 205.x.x.42
access-list acl-out permit gre any host 205.x.x.42
access-list acl-out permit tcp any host 205.x.x.42 eq pptp
ip address outside 205.x.x.41 255.255.255.248
static (inside,outside) 205.x.x.42 192.168.0.10 netmask 255.255.255.255 0 0
route outside 0.0.0.0 0.0.0.0 205.x.x.1 1

[+][-]08/20/08 11:35 AM, ID: 22272568Expert Comment

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[+][-]08/20/08 11:44 AM, ID: 22272656Accepted Solution

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About this solution

Zone: Cisco PIX Firewall
Tags: Cisco, PIX 506e, 6.3(5), Cisco, PIX 506e
Sign Up Now!
Solution Provided By: NWAtech
Participating Experts: 2
Solution Grade: A
 
[+][-]08/20/08 03:32 PM, ID: 22274561Expert Comment

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[+][-]08/21/08 06:05 AM, ID: 22278974Author Comment

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[+][-]08/21/08 10:52 AM, ID: 22282300Expert Comment

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[+][-]08/21/08 10:59 AM, ID: 22282379Author Comment

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[+][-]08/26/08 12:57 PM, ID: 22318740Expert Comment

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