Question

Cisco PIX 506e Internal network accessing external address

Asked by: john_parent

From our internal network (192.168.x.x) I am not able to gain access to any one of our external ISP addresses(10.10.x.x).  I am able to get to these addresses(10.10.x.x) from anywhere else. The PIX uses one of the external ISP addresses(10.10.x.1) to connect to other offices.  I have set up a web site on one of the other addresses(10.10.x.4) and am trying to gain access to it from our internal network(192.168.x.x) just like I can to any other web site.  Can the PIX box be configured to access any other address(10.10.x.x) in the range and how?

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Asked On
2003-10-14 at 15:10:24ID20766905
Topics

Miscellaneous Networking

,

Cisco PIX Firewall

,

Enterprise Firewalls

Participating Experts
4
Points
250
Comments
5

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Answers

 

by: lrmoorePosted on 2003-10-14 at 15:30:16ID: 9550733

There should be no reason why you can't get to them if you can get to anything on the Internet. It makes no distinction between any public IP address and anything on its outside interface - unless you have configured it to do otherwise.
Can you ping that web server from the PIX console?
Can you post your config?

 

by: mmedwidPosted on 2003-10-14 at 15:31:17ID: 9550744

I am not sure what you mean by "  I am able to get to these addresses(10.10.x.x) from anywhere else."  I say that because a 10.10.whatever address is a non-routable (aka RFC 1918) address.  So by definition it would never be accessible to anyone outside of the ISP.   So please better define "anywhere".

Then "I have set up a web site on one of the other addresses(10.10.x.4) and am trying to gain access to it from our internal network(192.168.x.x) just like I can to any other web site. "  Where topologically is this web site?  Are you saying it physically resides at the ISP, outside of your firewall and has the address 10.10.x.4?  

The pix can forward traffic anywhere you like.  You just need to input the proper routes.  So the answer to your question "Can the PIX box be configured to access any other address(10.10.x.x) in the range and how?" is...YES.  That assumes that the ISP is allowing you to access their internal IP blocks.

 

by: chicagoanPosted on 2003-10-14 at 16:30:22ID: 9550991

Check that the subnet masks match and default gateway on the web server, if the outside interface and the web server are on the same subnet there should be no problem. If you want suspenders and a belt add a static route:
route inside 10.10.x.0 255.255.255.0 10.10.x.0 1
The machine you're trying to access from must have a route to 10.10.x.0 255.255.x.0 as well so check your internal router's table and do a tracert from your desktop.

 

by: juliancrawfordPosted on 2004-02-23 at 13:49:51ID: 10436078

No comment has been added lately, so it's time to clean up this TA.
I will leave the following recommendation for this question in the Cleanup topic area:

Split: lrmoore {http:#9550733} & mmedwid {http:#9550744} & chicagoan {http:#9550991}

Please leave any comments here within the next four days.
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!

Julian Crawford
EE Cleanup Volunteer

20120131-EE-VQP-002

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