Unable to do upload from outside after configuring static nat

[rituporna111]

Hi Team,

There is a requirement to do natting in one of our ftp server.

The configuration I had done is-

FTP server original ip - 10.10.10.1 and natted ip -20.20.20.1

ip nat inside source static tcp 10.10.10.1 80 20.20.20.1 80 extendable

ip nat inside source static tcp 10.10.10.1 443 20.20.20.1 443 extendable
ip nat inside source static tcp 10.10.10.1 20 20.20.20.1 20 extendable
ip nat inside source static tcp 10.10.10.1 21 20.20.20.1 21 extendable

After this configuration from this ftp server we can access to internet.

Gateway set as 20.20.20.2

This gateway is reachable from ftp server.

But from 20.20.20.X segments they cant able to access to our ftp server.

Is anymore configuration need to be done on my end?

Thanks and regards,

Rituporna Sama

[carlguer]

Hello rituporna111,

I was checking the nat statements and I noticed that the nat for FTP is using port 80 (HTTP), is the FTP coming with that port or is it coming with the real port?

The port for FTP should be 20, this might be something that you need to take a look at.

If you want to know if the translation is working you can use the command:

"show ip nat translations"

If you want to filter the information provided you can use this key:

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Regards,

- Javier -