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New Member

NAT Problems, need fast help please....

Hi all

I have a Cisco 871W router which I need working in 5 hours max :(

So I need help! Router is online, I can access internet etc. I can SSH to the device which is @ 195.49.39.89 which is just fine.

BUT, I need to access a server behind the router which has ip adress 192.168.1.3 on port 5900(vnc service).

This is not working and I can't find where error is :(

Info:

Router external IP: 195.49.39.89

Vnc server IP: 192.168.1.3

I've been told that I'm missing some or one NAT config, but I have not the slightest clue what to do.

All help appreciated, attaching config file.

Thanks in advance.

EDIT: I have of course added my own external IP to the "ACL_OUTSIDE" access list, it's just not in the txt document.

2 ACCEPTED SOLUTIONS

Accepted Solutions
New Member

Re: NAT Problems, need fast help please....

To allow inbound access to the server

behind NAT router add this into your config:

ip nat inside source static tcp 192.168.1.3 5900 195.49.39.89 5900 extendable

Let me know if you have any issues.

Thx,

OW

Re: NAT Problems, need fast help please....

Hi

Configure this statement in global config i.e

router(config)#

Thanks

Mahmood

6 REPLIES
New Member

Re: NAT Problems, need fast help please....

To allow inbound access to the server

behind NAT router add this into your config:

ip nat inside source static tcp 192.168.1.3 5900 195.49.39.89 5900 extendable

Let me know if you have any issues.

Thx,

OW

New Member

Re: NAT Problems, need fast help please....

Hi can you please be more specific, where should I configure this? Line? On an interface or?

Thanks for the fast reply :)

Re: NAT Problems, need fast help please....

Hi

Configure this statement in global config i.e

router(config)#

Thanks

Mahmood

New Member

Re: NAT Problems, need fast help please....

You guys are the best :) Thanks alot, it's now working and I get the job done in time. \o/

New Member

Re: NAT Problems, need fast help please....

I did a post for my Cisco 1700.

Got nearly the same problem.

My server is an FTP server and i cant give port number in command

ip nat inside ....

Can anyone help me?

New Member

Re: NAT Problems, need fast help please....

It will be:

ip nat inside source static tcp 192.168.1.3 21 195.49.39.89 21 extendable

ip nat inside source static tcp 192.168.1.3 20 195.49.39.89 20 extendable

HTH,

OW

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