Solved

Cisco 1760 - IP Nat question - GRE

Posted on 2006-06-26
5
639 Views
Last Modified: 2008-03-06
Hi All,

I have been playing with this for a bit now, and dont want to go for my standard hit and miss routine any more!

For the purposes of this exercise, I have 1 global IP - I want that to connect to 3 servers

This should be simple;

ip nat source static tcp insideip1 80 outisdeip 80
ip nat source static tcp insideip2 25 outsideip 25

(i may have left something out of that, but you get the idea - this is all working fine)

Now, the problem is, I want one of those to go to a PPTP server - how do I get GRE to map the same way?

I know I can; ip nat source static tcp insideip3 1723 outsideip 1723 - but that isnt working, and I am assuming the problem is GRE

Ideas, suggestions???


thanks in advance

-red
0
Comment
Question by:redseatechnologies
  • 3
  • 2
5 Comments
 
LVL 79

Accepted Solution

by:
lrmoore earned 500 total points
ID: 16983294
It's a big problem. For GRE you must use a 1-1 static nat. You cannot PAT becuase there is no concept of ports with GRE - it's all or nothing. PAT only works for TCP | UDP
There is no workaround. You need a 2nd global for the GRE to work
0
 
LVL 39

Author Comment

by:redseatechnologies
ID: 16988595
Thanks for coming lrmoore - I appreciate your time.

I was hoping you weren't going to say that, but thought that may be the case.

I dont think this will work either, but humour me :)

Could I;

ip nat source static insideip1 outisdeip
ip nat source static tcp insideip2 80 outsideip 80

?

static 1-1 from the global to the rras server - then another on top of that.......

that isnt going to work either, is it

-red
0
 
LVL 79

Expert Comment

by:lrmoore
ID: 16988757
'Friad not, my friend...
It's either / or
Either 1-1 nat
or Per port NAT
0
 
LVL 39

Author Comment

by:redseatechnologies
ID: 16988942
Bugger!

oh well, no second vpn :)

Thanks again for your help lrmoore!

-red
0
 
LVL 79

Expert Comment

by:lrmoore
ID: 16989081
Thanks! I wish I had better news for you...

0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

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.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this tutorial I will show you with short command examples how to obtain a packet footprint of all traffic flowing thru your Juniper device running ScreenOS. I do not know the exact firmware requirement, but I think the fprofile command is availab…
How to set-up an On Demand, IPSec, Site to SIte, VPN from a Draytek Vigor Router to a Cyberoam UTM Appliance. A concise guide to the settings required on both devices
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question