Re: PVA via sshuttel tunnel

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 3/27/26 12:59 AM, Jörn Dreyer via Tech-talk wrote:

Hi Folks,

I have a problem with remote access to my EPICS pvagw using sshuttle as tunnel into my lab network.
If I enable on the gateway the debug output, I see the request I send from home and that it gets processed correctly by the gateway.
It ask the IOC for the PV and sends the answer correctly back to my entry host. But on the client side at home I get a timeout.
If I uase the ca protocol over sshuttle to another ioc running in the lab network everything works correctly.
Does anybody know ho to get that combination running?

I had not heard of "sshuttle" before.  At a guess, port numbers are probably being remapped.  PVA does not handle this well.

Personally, I can usually make due with forwarding only TCP and making use of EPICS_PVA_NAME_SERVER.  For simple situations, I can point the client directly at a single IOC.  For more complex situations, I can configure a p4p.gw to listen on TCP port 15064.  Forward that port with SSH.  Then point my client at "EPICS_PVA_NAME_SERVER=127.0.0.1:15064".