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One Public IP to different servers for different protocols  Static mapping help

Posted on 2006-07-11
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Last Modified: 2012-06-27
I have a similar situation to this one:

http://www.experts-exchange.com/Security/Firewalls/Q_21310837.html?query=%22static+%28inside%2Coutside%29+tcp+interface+smtp%22&clearTAFilter=true

I have one public ip that I want to use for smtp and http.  The smtp will be directed to a spam filter 172.16.0.23.  The http will go to an OWA server at 172.16.0.21.

I have a PIX 515E - 6.3(3)

I have setup acls and statics as follows, but have had no luck getting this to work.  It looks like all the traffic goes to 172.16.0.23 ( the filter).  I can't seem to get the www and https to direct to the web server.  

I also have other web servers that have their own statics, and this works fine for www/https at 172.16.0.17 and 172.16.0.2.

The public IP I am working with now is xx.xx.xx.54.

access-list 142 permit tcp any host xx.xx.xx.51 eq www
access-list 142 permit tcp any host xx.xx.xx.51 eq https
access-list 142 permit tcp any host xx.xx.xx.52 eq www
access-list 142 permit tcp any host xx.xx.xx.52 eq https
access-list 142 permit tcp any interface outside eq smtp
access-list 142 permit tcp any interface outside eq www
access-list 142 permit tcp any interface outside eq https

static (inside,outside) tcp interface smtp 172.16.0.23 smtp netmask 255.255.255.255 0 0
static (inside,outside) tcp interface www 172.16.0.21 www netmask 255.255.255.255 0 0
static (inside,outside) tcp interface https 172.16.0.21 https netmask 255.255.255.255 0 0
static (inside,outside) xx.xx.xx.51 172.16.0.2 netmask 255.255.255.255 0 0
static (inside,outside) xx.xx.xx.52 172.16.0.17 netmask 255.255.255.255 0 0
access-group 142 in interface outside

Any help on the commands I need to get this running would be appreciated!
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Question by:jdavidsbs
6 Comments
 
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Accepted Solution

by:
JEEGO earned 350 total points
ID: 17085108
I have done the same thing using similar ACL and STATIC statements
Remove the following statements, since you have a specific Public IP that you are using

access-list 142 permit tcp any interface outside eq smtp
access-list 142 permit tcp any interface outside eq www
access-list 142 permit tcp any interface outside eq https

static (inside,outside) tcp interface smtp 172.16.0.23 smtp netmask 255.255.255.255 0 0
static (inside,outside) tcp interface www 172.16.0.21 www netmask 255.255.255.255 0 0
static (inside,outside) tcp interface https 172.16.0.21 https netmask 255.255.255.255 0 0


Enter the following statements:

access-list 142 permit tcp any host xx.xx.xx.54 outside eq smtp
access-list 142 permit tcp any host xx.xx.xx.54 eq www
access-list 142 permit tcp any host xx.xx.xx.54 eq https

static (inside,outside) tcp xx.xx.xx.54 smtp 172.16.0.23 smtp netmask 255.255.255.255 0 0
static (inside,outside) tcp xx.xx.xx.54 www 172.16.0.21 www netmask 255.255.255.255 0 0
static (inside,outside) tcp xx.xx.xx.54  https 172.16.0.21 https netmask 255.255.255.255 0 0

clear xlate

If it works, then
wr mem

Thanks

JEEGO(AL) - in the spirit of the World Cup

0
 
LVL 79

Assisted Solution

by:lrmoore
lrmoore earned 100 total points
ID: 17085312
>6.3(3)
This is a buggy version. Suggest updating to 6.3(5)
Your configuration should work using 'interface' keyword
Did you run "clear xlate" ?
0
 
LVL 51

Assisted Solution

by:Keith Alabaster
Keith Alabaster earned 50 total points
ID: 17085325
access-list 142 permit tcp any host xx.xx.xx.54 outside eq smtp   <<< Don't need the word Outside here

Don't forget to reapply the access-group statement
access-group 142 in interface outside

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LVL 51

Expert Comment

by:Keith Alabaster
ID: 17085341
May need to add the following also if you are you additional IP addresses on the outside.

no sysopt noproxyarp outside
0
 

Author Comment

by:jdavidsbs
ID: 17085345
That looks like it worked, JEEGO.  I will double check tomorrow and award points then.

I had originally tried this setup, but it wasn't working that way... I think all I forgot was the clear xlate... ;(

ah well.....

0
 

Author Comment

by:jdavidsbs
ID: 17090959
lrmoore,
Thanks for the heads up on the version update.  I am planning to update this weekend.  This would explain a couple other wierd issues that I've had on this pix.  
The setup with the interface commands didn't work completely,  it wouldn't direct the web traffic to the right server.   I may try this if I have time after the update.

Thanks for the tips, Keith
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Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

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