External Access not resolving, other servers working...

[RaHaNGS]

Hi all, I'm running several servers on my Synology 920+.

I have setup my SABNZBD (v 4.2.3 [e7e06de]) to be accessible from outside my network, with a username/password, on regular port 8080, with a 0.0.0.0 host address, and Full Web Interface option. I have setup port redirection on my router. However, trying to access it on the external address pings out ("This site can't be reached" - connection timeout), while other servers that were setup similarly work fine on their respective ports.

I tried enabling/disabling HTTPS, tried to change the port(s) and forward those, all to no avail.

Does anybody know were to look next or why that may be?

[safihre]

If you can reach Sab from your computer, then Sab is configured correctly.. It doesn't know the difference if it's exposed to the internet or not.
Have you checked the Synology firewall settings?

[RaHaNGS]

Hi safihre, thanks for answering.

Yes I did, Firewall is on with the default profile, which doesn't seem to prevent other servers from being reached... I added the 8080 port manually to the white list anyway, still pings out.

Edit: portchecker confirms the 8080 port is open.

[sander]

> However, trying to access it on the external address pings out ("This site can't be reached" - connection timeout),

How do you do that? From your LAN? If so, that's risky (needs hair pinning in your router).

So do this: use your phone, turn off Wifi, and then try to access SABnzbd on your Synology.

[RaHaNGS]

Hi sander! Thanks for answering.

Access works from my Phone (with wi-fi disabled)... So first off, thank you, I didn't even think to check from another device not on my LAN ;P

But I don't understand what's the issue doing it from my LAN? What is "hair pinning"?

[sander]

https://en.wikipedia.org/wiki/Network_a ... airpinning

[sander]

BTW: you have IPv6, haven't you? You can check via SABnzbd -> Wrench -> Status.

Advantage of IPv6: no NAT, no hairpinning. Disadvantage: not reachable from IPv4-only connections.

But if you use Dyndns, worth configuring

[RaHaNGS]

@sander: yes, I do have IPv6; but will probably not be using it. I can just access through the local IP should I need to.

How come hairpinning works for other ports/servers and not SABNZBD?

[sander]

@sander: yes, I do have IPv6; but will probably not be using it. I can just access through the local IP should I need to.

Pity!

How come hairpinning works for other ports/servers and not SABNZBD?

I cannot imagine that ...