Can't connect to VPN from external WiFi, can on LAN

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lbutlr
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Can't connect to VPN from external WiFi, can on LAN

Unread post by lbutlr » Thu May 17, 2018 10:42 pm

I can connect to the SYnology VPN via L2TP on my LAN, but not when I am on an external WiFi (for example, the office or Starbucks). This leads me to think the issue is port forwarding or NAT Transversal, but I have opened all of the following ports to point to the same ports on the Synology (10.0.0.221).

50 (TCP/UDP), 500 (UDP), 1701 (UDP), 4500 (UDP).
“The chief obstacle to the progress of the human race is the human race. ”
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Shadow771
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Re: Can't connect to VPN from external WiFi, can on LAN

Unread post by Shadow771 » Thu May 17, 2018 11:03 pm

lbutlr wrote:
Thu May 17, 2018 10:42 pm
but not when I am on an external WiFi (for example, the office or Starbucks).
And what about let's say the internet data plan of your mobile phone? Because usually an office and Starbucks will only have port 80 and 443 open. If you can open a VPN connection on your office... Wow, really unsecured...
Synology DS216+II <--> Synology RT1900AC <--> <site-to-site VPN tunnel> <--> Synology RT1900AC <--> Synology DS118

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lbutlr
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Re: Can't connect to VPN from external WiFi, can on LAN

Unread post by lbutlr » Fri May 18, 2018 4:16 pm

my cellular data doesn't enter into it. I need to connect to my VPN when I am on untrusted WiFi (the office is no some corporate network, it's a shared WiFi for an office building). I know for a fact the office does not port block.

The mobile carrier I use is IPv6 only and my ISP doesn't support IPv6, so I can never use a VPN when on mobile.
“The chief obstacle to the progress of the human race is the human race. ”
― Don Marquis

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