Re: [fw-wiz] Pix 501 NAT problems with Web and Exchange server
- From: "Crissup, John \(MBNAP it\)" <John.Crissup@xxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 27 Nov 2006 12:02:07 -0600
The most glaring problem that immediately shows up is your access list
assuming that all traffic destined for port 80 (for example) will also
be sourced from port 80. Quoting a couple of your lines below...
access-list outside_access_in permit tcp any eq www interface outsideeq www
access-list outside_access_in permit tcp any eq https interfaceoutside eq https
access-list outside_access_in permit tcp any eq smtp interface outsideeq smtp
These should be changed to...
access-list outside_access_in permit tcp any interface outside eq www
access-list outside_access_in permit tcp any interface outside eq https
access-list outside_access_in permit tcp any interface outside eq smtp
--
John
________________________________
From: firewall-wizards-bounces@xxxxxxxxxxxxxxxxxxxxx
[mailto:firewall-wizards-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of
William A. May
Sent: Saturday, November 25, 2006 7:51 PM
To: firewall-wizards@xxxxxxxxxxxxxxxxxxxxx
Subject: [fw-wiz] Pix 501 NAT problems with Web and Exchange server
I read through the postings about inbound NAT problems with the PIX 501
posted in February 2005 and tried to configure my new PIX 501
accordingly but with little luck. What I trying to do is replace my
Linksys WRT54G with a PIX 501. I have a Web server and an Exchange
Server 2003 on my internal network and I want to be able to have my web
page accessed from the outside and I also want to be able to continue to
receive my email. Currently I can view web pages and send email.
Listed below is my current configuration, with certain marked changes,
please let me know where I'm going wrong?
Thanks,
Alan
: Saved
: Written by enable_15 at 19:49:11.582 UTC Sat Nov 25 2006
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password <deleted> encrypted
passwd <deleted> encrypted
hostname pixfirewall <changed>
domain-name ciscopix.com <changed>
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
no fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
name 172.16.10.0 LAN <changed>
name 172.16.10.11 Web-Exch-Server <changed>
access-list outside_access_in permit tcp any eq www interface outside eq
www
access-list outside_access_in permit tcp any eq https interface outside
eq https
access-list outside_access_in permit tcp any eq smtp interface outside
eq smtp
access-list outside_access_in permit icmp any any echo-reply
access-list outside_access_in permit icmp any any traceroute
access-list outside_access_in permit icmp any any time-exceeded
access-list inside_access_in permit icmp any any
access-list inside_access_in permit ip LAN 255.255.255.0 any
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside dhcp setroute
ip address inside 172.16.10.1 255.255.255.0 <changed>
ip audit info action alarm
ip audit attack action alarm
pdm location LAN 255.255.255.0 inside
pdm location Web-Exch-Server 255.255.255.255 inside
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
static (inside,outside) tcp interface www Web-Exch-Server www netmask
255.255.255.255 0 0
static (inside,outside) tcp interface https Web-Exch-Server https
netmask 255.255.255.255 0 0
static (inside,outside) tcp interface smtp Web-Exch-Server smtp netmask
255.255.255.255 0 0
access-group outside_access_in in interface outside
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 LAN 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd auto_config outside
terminal width 80
Cryptochecksum:8069dd3a26bd7570990dfe55c7c7064e
: end
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