Advice for network config 2xNAS on same LAN

[george13]

Hi,
I'm stuck with a serious issue for which I don't know to which side to turn, and I'm hoping that you network experts may be able to give me some advice.
The situation:
2 routers, Asus RT AC66U (Merlin firmware) and a Linksys E4200 (at the moment operating in bridge mode)
Synology DS212+ (mail server, ftp server, VPN server, web server, BT server, multimedia server, surveillance, file server). These functions are covered by a pretty extended NAT table in the Asus.
I now got a hold of a more powerful DS412+, and I would like to have both active, and in such a way that the 2 NAS can see each other.
A first issue is the port forwarding (most of them are fixed for the NAS), unless I work with a double NAT, which will give issues.
Does anyone please have any recommendations how to hook everything up?

 

[thiggins]

Since everything lives on one network, both NASes should be accessible to everything on the LAN.

If the problem is remote access, then you will need to change the port used by FTP, HTTP and other servers from the default on one of the NASes. They you forward the second set of ports on your main router.

 

[Dreamslacker]

Hi,

I now got a hold of a more powerful DS412+, and I would like to have both active, and in such a way that the 2 NAS can see each other.
A first issue is the port forwarding (most of them are fixed for the NAS), unless I work with a double NAT, which will give issues.
Does anyone please have any recommendations how to hook everything up?

Place both NAS on the same network (LAN), each with it's own IP.

Synology DSM allows you to change the access ports though it isn't absolutely necessary unless you're using the built-in DDNS service (****.synology.me).
You can simply use a different remote port on your port forwarding.

i.e.
Use port 5000 to point to NAS1 IP, local port 5000.
Use Port 5001 to point to NAS2 IP, local port 5000.

For internal access, just point to the correct NAS IP with port 5000.

 

[george13]

This would indeed solve the problem for a great deal, thanks, but it leaves one area open, and that is the external access by mobile. I don't know about iPhone, but the port is hardcoded in the apps for Android.

 

[Dreamslacker]

This would indeed solve the problem for a great deal, thanks, but it leaves one area open, and that is the external access by mobile. I don't know about iPhone, but the port is hardcoded in the apps for Android.

No, I don't think it's hardcoded. At least not the last time I used DS File on Android. You simply add the port number behind the hostname using a colon.

e.g. abcde.no-ip.org:10000

 

[george13]

I will give that a try. Thanks.
Another question. There is a number of ports that can not be configured, for example 443 for Mailstation and Photostation, 445 for CIFS, 6690 for Cloudstation, 9997:9999 for Synology Assistant, and there are more. How would you take care of these ports?

Thanks

 

[sinshiva]

regarding the last post

on the router's port forward management interace, local= local to the router, visible from the outside. remote= local to the server.

so for the extra server trying to use the same ports, you could do 4443 local to 443 remote, which is to the second local nas.

you'd then want to specify in the browser https://whatever.com:4443 if that's meant to be accessed from a browser, or hope that it's configurable if using a proprietary client software.