Access FTP over LAN

bhavpatel · Mar 29, 2014

Hi All,

The set up :
Router : Netgear D200-100UKS
FTP : Mybook Live 2TB
OS : Win 7

Problem:
FTP is able to be accessed over WAN using no-ip forward to port 21 vai router.

On the LAN the only way to access the FTP is ftp://192.168.2.xxxxx but not using the host name. i.e xxhotnamexx.no-ip.biz

it seems the host name can only work over WAN and not LAN, does anyone know why that would be???

Much appreciated

Someone Somewhere · Mar 29, 2014

Your router probably doesn't support what's known as 'hairpin NAT', where the data has to go out through the firewall and then back in.

bhavpatel · Mar 29, 2014

Someone Somewhere :

Thanks

Is there a solution for this.........?

Shaun o · Mar 29, 2014

I`m not sure but DMZ of a router is outside the firewall of the router.
Or it can have it`s own set of rules in regard to firewall settings.

But it will leave it open of course to all sorts.
Unless you set up the type of log in for a user and how they can interact with files or folders.

Any service that is being provided to users on the external network can be placed in the DMZ. The most common of these services are:

Web servers
Mail servers
FTP servers

Someone Somewhere · Mar 29, 2014

No, DMZ won't fix it.

It's the fact that the NAT and firewall in the router that someone connected on the internal side of the router might want to access the external IP of the router. It's quite a rare situation, and many consumer routers don't support it.

Two options:

■ Get a router that does. Finding out which do could be difficult, though.
■ Put an entry in the DNS server in the router to make it return the internal IP for the domain name. Most consumer routers won't support that, etiher.

Or just set it up so it talks to the internal IP by default.

bhavpatel · Mar 29, 2014

Someone Somewhere :

How do you do that?

Someone Somewhere · Mar 29, 2014

What's the system that's trying to access the FTP server? Change the external domain name to the internal IP address.

bhavpatel · Mar 29, 2014

Someone Somewhere :

System is normal WIN 7 Professional desktop, when you say change the domain name would that be the same as changing the Workgroup name?

Shaun o · Mar 29, 2014

You know he`s right thinking about it.

You would need a router capable of what the mod is saying.

Someone Somewhere · Mar 29, 2014

No, I'm talking about changing where you entered 'yourdomain.noip.com' to '192.168.2.x'.

bhavpatel · Mar 29, 2014

Someone Somewhere :

So basically I have to use ftp://192.168.2.xxx no other way around it.

Oh well....life can't always be perfect.

Thanks to everyone that answered.....

Someone Somewhere · Mar 29, 2014

Either that or a new router.

bhavpatel · Mar 29, 2014

Someone Somewhere :

We just bought the router and it's out of the 30 day return period, I must admit that I never thought the router would prevent a NAT loopback.......

But as the workaround would be to just use ftp://192.168.2.xxxxx then it's something we can live with...... but will keep in mind for future reference.

Cheers

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Access FTP over LAN

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