Plex IP address confusion

[Monkey_Demon]

After upgrading from FreeNAS to TrueNAS, I followed SpaceRex's excellent Install Plex on TrueNAS tutorial. But I ran into these problems with the IP addresses:

1. In my router I reserved 192.168.1.195 for the Plex Media Server (PMS).
2. @ 13.17 the tutorial show how to get the IP address of the PMS: Jails > plex Jail > IPv4. In my case, this is 172.16.0.2/30.
3. I try to modify this with Jails > plex Jail > Stop; Jails > plex Jail > Edit. But the IPv4 settings are grayed out and cannot be modified. I don't know how these settings got there, but they're wrong. The settings that seem most relevant are set as follows:
   • DHCP Autoconfigure IPv4: unchecked
   • NAT: checked
   • VNET: checked
   • Berkeley Packet Filter: unchecked
   • vnet_default_interface: auto
   • IPv4 interface: vnet0
   • IPv4 address: 172.16.0.2
   • IPv4 netmask: 30
   • IPv4 default router: 172.16.0.1
4. @ 14:00 the tutorial shows how to get the IP address of the admin portal: Plugins > plex > Admin portals. In my case this is http://192.168.1.191:32400/web
5. The tutorial says to use this IP address to connect to the PMS. But when I do this, I get an error message: "This site can't be reached. 192.168.1.191 refused to connect."

I'm pretty certain the settings in #3 above are a large part of the problem. But how can I change them?

And looking at the other settings, do I need to do anything else?

 

[sretalla]

• DHCP Autoconfigure IPv4: unchecked
• NAT: checked
• VNET: checked
• Berkeley Packet Filter: unchecked

That's all wrong...

If you want the jail to have its own IP stack (and a different address from the host):

DHCP: Checked
NAT: Unchecked (you will get the other settings back when you uncheck this one)
VNET: Checked
Berkeley Packet Filter: Checked (Mandatory for DHCP to work).

 

[Monkey_Demon]

Thanks. I tried changing the Jail's setting to have everything checked except NAT. This seems OK, but I'm still unable to change the IP addresses in the vnet_default_interface section.

Any ideas about how to accomplish this?

 

[danb35]

everything checked except NAT

"Everything" includes DHCP. You know what DHCP does, right?

 

[Monkey_Demon]

"Everything" includes DHCP. You know what DHCP does, right?

Dynamic Host Configuration Protocol ordinarily assigns IP addresses from a pool of available ones. But my router (a Linksys WRT3200 ACM) has a "Connectivity" dialog with a "DHCP Reservations" button. Inside the resulting window several IP addresses are reserved for my NAS, including 192.168.1.195 for the Plex Media Server, as mentioned earlier. I believe my problem has something to do with my inability to assign this IP address within TrueNAS.

Since I'm not even close to running a DNS yet, I have to use numeric IP addresses. Hence, the static DHCP address is necessary, if for no other reason than it's the only reliable way to reach the PMS.

This more-or-less exhausts my knowledge of DHCP.

And yes, the DHCP checkbox is checked.

 

[danb35]

And yes, the DHCP checkbox is checked.

So why do you think you'll be able to set an IP address on the TrueNAS side? You cannot simultaneously tell a computer (or a virtual computer) "get your configuration via DHCP" and "use this IP/subnet/gateway." Those are mutually exclusive.

 

[Monkey_Demon]

This is exactly why I left the box unchecked (see my original post), until Sretalla said, "If you want the jail to have its own IP stack (and a different address from the host) ... DHCP: Checked ...."

What I want is for the jail to have its own IP stack, an address different from the host, AND this address should be fixed as 192.168.1.195.

I just don't know how to achieve this, but IIRC I had this working previously, before the upgrade to TrueNAS.

 

[danb35]

I just don't know how to achieve this,

Two ways; either will work:

• Disable DHCP for the jail, set it to the IP/netmask/gateway as appropriate to your network
• Set up a IP reservation in your router (which it sounds like you've already done), based on the MAC address for the jail. In this case, enable DHCP for the jail