Portforward from Modem A or B (or both)?

eladnova

Hi guys

I'm trying to set up port forwarding so I can FTP into my NAS. I actually had this working before and know a little about port forwarding etc and DNS etc but unfortunately hosed my settings.

I have a setup of

A: Broadband cable router (bridge mode)
B: Netgear router
C: NAS




My question is, do I need to :

1. Setup port forwarding from Router A to NAS C.
OR
2 Setup port forwarding from Router A to Router B and then setup Router B to port forward to NAS C

I just cannot seem to get this working this time around and I'm running DSM 6.

I have the following checklists complete

* UPC gave me a IPV4 address and the router A is in bridge mode
* Router A has a NOIP Dynamic IP address which works
* NAS Drive C has a reserved IP established on Router B Control Panel.

I've read and re-read the forums as there are multiple FTP posts but nothing mentioned works.

Any suggestions? Particularly around points 1 and 2.
Thanks in advance

mass_debater

eladnova wrote: »

Hi guys

I'm trying to set up port forwarding so I can FTP into my NAS. I actually had this working before and know a little about port forwarding etc and DNS etc but unfortunately hosed my settings.

I have a setup of

A: Broadband cable router (bridge mode)
B: Netgear router
C: NAS




My question is, do I need to :

1. Setup port forwarding from Router A to NAS C.
OR
2 Setup port forwarding from Router A to Router B and then setup Router B to port forward to NAS C

I just cannot seem to get this working this time around and I'm running DSM 6.

I have the following checklists complete

* UPC gave me a IPV4 address and the router A is in bridge mode
* Router A has a NOIP Dynamic IP address which works
* NAS Drive C has a reserved IP established on Router B Control Panel.

I've read and re-read the forums as there are multiple FTP posts but nothing mentioned works.

Any suggestions? Particularly around points 1 and 2.
Thanks in advance

If your modem is in bridge mode it's a layer 2 device so will not be routing. You port forward from your router b to the Nas

eladnova

mass_debater wrote: »

If your modem is in bridge mode it's a layer 2 device so will not be routing. You port forward from your router b to the Nas

Cheers man. Was wondering.
No joy so far.

oddly enough, it works fine if Modem B is set to AccessPoint mode.
But that's no good for me as it disables a lot of the router functionality I need.

I'll eventually fig it out! There's a shed load of settings in the NAS Control Panel too so it could be one of them although FTP does work locally (not externally) so I'm half way there.

ED E

Then you aren't actually bridging.

eladnova

ED E wrote: »

Then you aren't actually bridging.

"Then..."

When?
When I was in Access Point mode? I get that.
Or did you mean I'm not in bridge mode if port forwarding is not working?

brianwalshcork

What port numbers are you forwarding for FTP?

eladnova

brianwalshcork wrote: »

What port numbers are you forwarding for FTP?

Hi Brian

I'm forwarding ports

21 for FTP
22 for SFTP
55536-55663 for Passive mode

Cuddlesworth

What device is Router B, from what provider?

Is Router A plugged into the WAN port on Router B.

What IP does router B get on its WAN interface, does it start with 10 or 192?

eladnova

Cuddlesworth wrote: »

What device is Router B, from what provider?

Is Router A plugged into the WAN port on Router B.

What IP does router B get on its WAN interface, does it start with 10 or 192?

Router B: A Netgear R7000

Router A (UPC) is plugged into one of the 4 ethernet ports on Router B (Netgear).
Should it instead be plugged into the single "internet" port n Router B (Netgear)?

Router B WAN interface: 192.168.1.18

Cuddlesworth

eladnova wrote: »

Router B: A Netgear R7000

Router A (UPC) is plugged into one of the 4 ethernet ports on Router B (Netgear).
Should it instead be plugged into the single "internet" port n Router B (Netgear)?

Router B WAN interface: 192.168.1.18

In your case, router B is not acting as a router. Router B should be set to access point mode. Port forwarding should be between router A and NAS C.

You should check to see if IPV6 is enabled, http://test-ipv6.com/ It should come up as "no IPV6 enabled". If that is the case, port forwarding should work. If not, you don't have a valid IPV4 address from Virgin.

eladnova

Ok thanks.

I do have an IP 4 address (just checked) and apparently the UPC guys set it to bridge mode which can be implemented on a request basis.
Normally by default they do IPV6 and don't support bridge mode.

Cuddlesworth

Is it one of the new large white 360MB modems?

Like this.

eladnova

Cuddlesworth wrote: »

Is it one of the new large white 360MB modems?

Like this.

No such luck. It's the hideous technicolor 7200

https://www.google.ie/search?q=upc+modem+technicolor+7200&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiFtLafzJrMAhXHbhQKHWxxCvoQ_AUIBygB&biw=1293&bih=1290

Cuddlesworth

eladnova wrote: »

No such luck. It's the hideous technicolor 7200

Its not in bridge/modem mode. Bridge mode is where the device becomes a modem for coaxial, no wifi or other services work on it. I know that because UPC don't allow or support bridge mode on the 7200. They deliberately removed it.

Your choices are

• Get the new 360Mb compal modem(this does allow a "modem" mode)
• Turn your netgear into AP mode and do what you need to do on the somewhat dodgey 7200.
• Run double Nat, where the 7200 plugs into the WAN port on the Netgear. There is a good chance this will break something else though, its not a good idea in general.