One more piece of information...
I created a warden jail as described here:
https://forums.freenas.org/index.ph...to-install-plex-in-a-freenas-11-0-jail.19412/
Same original problem described at the top of this thread for the warden jail: everything appears to be working from a networking standpoint (can ping the jail, can point the router from within the jail, Plex web interface appears after installing plex), but the Plex server can't be claimed.
Then as a test, I went to the Freenas web interface -> Jails -> Edit jail -> Advanced Mode and unchecked the VIMAGE box for this warden jail running Plex. Immediately able to claim the server (with the side effect that the FreeNAS web gui appears at the plex IP address as well as as its own address).
An issue with VIMAGE/VNET for both warden and iocage? I don't know enough to appreciate all the consequences of unchecking that box.
I created a warden jail as described here:
https://forums.freenas.org/index.ph...to-install-plex-in-a-freenas-11-0-jail.19412/
Same original problem described at the top of this thread for the warden jail: everything appears to be working from a networking standpoint (can ping the jail, can point the router from within the jail, Plex web interface appears after installing plex), but the Plex server can't be claimed.
Then as a test, I went to the Freenas web interface -> Jails -> Edit jail -> Advanced Mode and unchecked the VIMAGE box for this warden jail running Plex. Immediately able to claim the server (with the side effect that the FreeNAS web gui appears at the plex IP address as well as as its own address).
An issue with VIMAGE/VNET for both warden and iocage? I don't know enough to appreciate all the consequences of unchecking that box.