PLEASE HELP

[sdruhl]

I have a web server in my DMZ. I have a local area network that needs to access the webserver. We currently cannot ping the IP address assigned to the webserver, outisde or inside. Is there anyway of doing this besides putting a nic in the server and connecting it to my lan? I have a Pix 515 DMZ, with 3 interfaces. One for the WAN, One for the LAN, and one for the DMZ. Any help would be appreciated.

 

[308win]

do you have PAT set up between the DMZ and the inside

global (dmz) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0 0 0

-- note this gives everything on your inside access to everything on your dmz, unless controlled by an access list on the inside.

do you have an access list applied to the inside interface? if so does it permit traffic to that web server?

 

[sdruhl]

Thanks for the reply 308Win. I have added the global dmz 1 interface command and i have an access list applied to the inside interface to allow communication to my web server. i also have the nat command for the inside in there. It's still not working. Any other ideas?? Thank You

 

[lgarner]

Have you allowed the web server to return ICMP to the LAN?

Also, you say you have an "access-list" applied to the inside i/f. What does that look like? Try removing it. TCP shouldn't require an access list to work as you've described, so that might be the problem.

 

[sdruhl]

I have removed the access list and still no good. I have allowed ICMP from the web server to the LAN.

 

[lgarner]

Try "debug icmp trace" to see what's happening on the Pix.

 

[308win]

Can you post a 'sanitized' config

 

[sdruhl]

ok, sorry for the delay. Here is the current config. I had to delete IP addresses,hostnames etc. because this is a high profile client. I am sure you guys understand. The goal here is to get the inside Lan to access a web server in the DMZ. Any help is greatly appreciated.

PIX Version 6.3(3)
interface ethernet0 auto
interface ethernet1 auto
interface ethernet2 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 intf2 security4
enable password 4Z.0bLezzf2LWKL. encrypted
passwd 4Z.0bLezzf2LWKL. encrypted
hostname
domain-name
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 101 permit tcp any host eq 3389
access-list 101 permit tcp any host eq www
access-list 101 permit tcp any host eq 3389
access-list 101 permit icmp any any
pager lines 24
mtu outside 1500
mtu inside 1500
mtu intf2 1500
ip address outside
ip address inside 192.168.1.10 255.255.255.0
ip address intf2 172.16.100.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 10
global (intf2) 1 interface
nat (inside) 10 0.0.0.0 0.0.0.0 0 0
nat (intf2) 1 0.0.0.0 0.0.0.0 0 0
static (inside,outside) 192.168.1.6 netmask 255.255.255.255 0 0
static (intf2,outside) 172.16.100.10 netmask 255.255.255.255 0 0
access-group 101 in interface outside
route outside 0.0.0.0 0.0.0.0 1
timeout xlate 3:00:00
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 uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
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
telnet 0.0.0.0 0.0.0.0 inside
telnet timeout 5
ssh timeout 5
console timeout 0
terminal width 80
Cryptochecksum:2fa08ad59bed0d3f798b477004bef73a
: end
[OK]

 

[308win]

the config speaks 1000 words

the problem looks to me to be in the global-nat statements

global (outside) 10
global (intf2) 1 interface
nat (inside) 10 0.0.0.0 0.0.0.0 0 0
nat (intf2) 1 0.0.0.0 0.0.0.0 0 0



you have nat inside associated with 10, nat int 2f associated with 1. then your global's outside is 10, int2f is 1. inside to outside uses 10, works fine. inside to int2f has nothing in common.

either change the global int2f to 10 or add nat (inside) 1 0.0.0.0 0.0.0.0

Delete the nat (intf2) 1 0.0.0.0 0.0.0.0 , it isn't doing you anything.

 

[sdruhl]

OK. I deleted the nat (intf2) 1 0.0.0.0 0.0.0.0 0 0
I also changed the global intf2 to the following
global (intf2) 10 interface. I still cannot ping the web server in the DMZ or access the web page. Is there anything else I have to do?

 

[sdruhl]

Can anybody assist me with this????

 

[rudeboy]

This is not Gospel but it may help...Your access-list is allowing icmp from the outside to the DMZ and to your LAN. There is no access-list that is technically allowing ICMP from your DMZ to your LAN. There should be an access-list on your inside interface.
For now , try removing
static (intf2,outside) 172.16.100.10 netmask 255.255.255.255
and replace it with
static(intf2,outside) 172.16.100.0 172.16.100.0 netmask 255.255.255.0
Do that with the current access-list and see if that allows ping from the outside to the DMZ. If that works for you, we will attack the LAN to DMZ issue next.

 

[lgarner]

I have allowed ICMP from the web server to the LAN"

I don't see it. Your config has an access-group applied to the outside interface, but not to intf2.

access-list 102 permit icmp any any echo-reply
access-group 102 in interface intf2

Does the web server work from the outside? It looks like you should be able to browse the server from the inside as well.