[Bug]: ADS Driver doesn't seem to support connections via VPN

apache / plc4x

PLC4X The Industrial IoT adapter

https://plc4x.apache.org/

Apache License 2.0

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[Bug]: ADS Driver doesn't seem to support connections via VPN #1519

Open chrisdutz opened 2 months ago

chrisdutz commented 2 months ago

What happened?

When trying to connect to an ADS device via a VPN connection, the remote device seems to simply hang up.

Version

v0.13.0-SNAPSHOT

Programming Languages

[X] plc4j
[ ] plc4go
[ ] plc4c
[ ] plc4net

Protocols

[ ] AB-Ethernet
[X] ADS /AMS
[ ] BACnet/IP
[ ] CANopen
[ ] DeltaV
[ ] DF1
[ ] EtherNet/IP
[ ] Firmata
[ ] KNXnet/IP
[ ] Modbus
[ ] OPC-UA
[ ] S7

IsmoLeszczynski commented 2 months ago

Just as additional information relating to this, I've been working on a solution and testing it via an OpenVPN connection successfully, so some VPN connections work.

What I did have issues with was connecting via IP instead of hostname, don't know that's related - using IP caused the PLC to terminate the connection immediately, but using hostname worked fine. This was a bit puzzling, but I haven't used ADS enough to say is this as it should be.

chrisdutz commented 2 months ago

I recently setup my test-environment to be only reachable via VPN (Unify Gateway) ... so when using the built-in MAC VPN (L2TP over IPSec) and using an IP I was having the remote simply hang up ... if this is just a documentation problem, then I would be super happy ;-)

chrisdutz commented 2 months ago

I think the problem might be related to my device getting an IP address that is generally not reachable from the ADS device. So the device has the IP 192.168.23.20 and a netmask for 255.255.255.0 ... my local dialin computer has an address of 192.168.2.6 ... I would probably try to configure the VPN to give my client an IP on the remote network instead of using the VPN tunnel as default gateway.