We recently had a problem where we remotly tried to update a small portion of Codesys code (we don’t really do this but this was a special, testing only case where everything was secure). When updating Codesys runtime crashed and we couldn’t remotly login again. The idea then was to SSH into the PLC are remotly reboot it.
We SSH-ed into the router and then form the router tried to SSH into the PLC. Reading beck’s instructions told us that the default username/password combination is ssh/ssh. The username and password were accepted BUT after login the terminal simply freezes.
We then tried the same thing with telnet (defaults are tel/tel) and the same happens. We trid using Putty, Win32-openssh and chiptool terminal and the same problem occurs.
What could be the problem here? It would be quite useful if it was possible to remotly reboot the PLC. We are using VPN to connect to the PLC, so it should be secure.
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