Cannot connect to remote indiserver device from PH - by: kengs

I'm not sure if this is an INDI problem or PHD2 problem but I'm guessing it is INDI or more likely something I'm doing or not doing in regards to INDI
Hoping someone can point me in the right direction.

I have INDI installed on a Raspberry Pi 2 running Ubuntu Mate 15.10. IP Address 192.168.0.15
Raspberry Pi is powered from a powered USB hub
A DBK21AU04 camera is connected to the powered USB hub
RPi: Indi library 1.2.0 Protocol 1.7
I also have INDI and PHD2 installed on my 64bit desktop running Ubuntu 15.10
Desktop: Indi library 1.2.0 Protocol 1.7

I am chaining to the camera on the RPi from indiserver on the desktop.
Running PHD2 on the RPi I can connect successfully to the camera.
But if I try to connect to the camera from PHD2 running on the desktop it cannot connect.
In fact, available camera is not displayed in PHD2 setup
I thought indiserver on the desktop would provide same info to PHD2 as if the camera were connected locally and would show up in the Driver dropdown list.
If there is an easy way to test the chained connection I'm keen to know. I tried using EKOS but it always set up its own indiserver.

Details are as follows:
On the RPi I start indiserver with:
indiserver -vv indi_v4l2_ccd &

Then on desktop I start indiserver with:
indiserver -vv This email address is being protected from spambots. You need JavaScript enabled to view it. &

I run PHD2 on the desktop. I click the Connect button and select as Camera "Indi Camera"
I then click the Camera Setup button:
- Indiserver is shown as connected
- Driver has no drop down options. So I type in V4L2 CCD (this is the option that appears on the RPi)
- CCD says Main Imager
I then click OK

desktop indiserver log says:
ken@ken-ubuntu:~$ 2016-02-02T10:27:41: Client 0: new arrival from 127.0.0.1:40270 - welcome!
2016-02-02T10:27:41: Client 0: read <getProperties device='' name=''>
2016-02-02T10:27:41: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: queuing responsible for <getProperties device='' name=''>
2016-02-02T10:27:41: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: sending <getProperties version="1.7"/>

2016-02-02T10:27:50: Client 0: read EOF
2016-02-02T10:27:50: Client 0: shut down complete - bye!

I then click Connect in PHD2
indiserver log says:
ken@ken-ubuntu:~$ 2016-02-02T10:29:51: Client 0: new arrival from 127.0.0.1:40272 - welcome!
2016-02-02T10:29:51: Client 0: read <enableBLOB device='V4L2 CCD' name='CCD1'>
2016-02-02T10:29:51: Client 0: read <getProperties device='V4L2 CCD' name=''>
2016-02-02T10:29:57: Client 0: read EOF
2016-02-02T10:29:57: Client 0: shut down complete - bye!

PHD reports that it cannot connect to V4L2 CCD

Next I try Camera Setup with Driver: indi_v4l2_ccd
I then click OK

indiserver log says:
ken@ken-ubuntu:~$ 2016-02-02T10:31:41: Client 0: new arrival from 127.0.0.1:40276 - welcome!
2016-02-02T10:31:41: Client 0: read <getProperties device='' name=''>
2016-02-02T10:31:41: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: queuing responsible for <getProperties device='' name=''>
2016-02-02T10:31:41: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: sending <getProperties version="1.7"/>

2016-02-02T10:31:55: Client 0: read EOF
2016-02-02T10:31:55: Client 0: shut down complete - bye!

I then click Connect
indiserver log says:
ken@ken-ubuntu:~$ 2016-02-02T10:33:38: Client 0: new arrival from 127.0.0.1:40278 - welcome!
2016-02-02T10:33:38: Client 0: read <enableBLOB device='indi_v4l2_ccd' name='CCD1'>
2016-02-02T10:33:38: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: queuing responsible for <enableBLOB device='indi_v4l2_ccd' name='CCD1'>
2016-02-02T10:33:38: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: sending <enableBLOB device="indi_v4l2_ccd" name="CCD1">
Al
2016-02-02T10:33:38: Client 0: read <getProperties device='indi_v4l2_ccd' name=''>
2016-02-02T10:33:38: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: queuing responsible for <getProperties device='indi_v4l2_ccd' name=''>
2016-02-02T10:33:38: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: sending <getProperties version="1.7" device="indi_v4l2_ccd
2016-02-02T10:33:44: Client 0: read EOF
2016-02-02T10:33:44: Client 0: shut down complete - bye!

PHD reports that it cannot connect to indi_v4l2_ccd

Next I try Camera Setup with Driver: This email address is being protected from spambots. You need JavaScript enabled to view it.
I then click OK

indiserver log says:
ken@ken-ubuntu:~$ 2016-02-02T10:37:39: Client 0: new arrival from 127.0.0.1:40282 - welcome!
2016-02-02T10:37:39: Client 0: read <getProperties device='' name=''>
2016-02-02T10:37:39: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: queuing responsible for <getProperties device='' name=''>
2016-02-02T10:37:39: Driver This email address is being protected from spambots. You need JavaScript enabled to view it.: sending <getProperties version="1.7"/>

2016-02-02T10:37:44: Client 0: read EOF
2016-02-02T10:37:44: Client 0: shut down complete - bye!

I then click Connect
indiserver log says:
ken@ken-ubuntu:~$ 2016-02-02T10:38:28: Client 0: new arrival from 127.0.0.1:40284 - welcome!
2016-02-02T10:38:28: Client 0: read <enableBLOB device='This email address is being protected from spambots. You need JavaScript enabled to view it.' name='CCD1'>
2016-02-02T10:38:28: Client 0: read <getProperties device='This email address is being protected from spambots. You need JavaScript enabled to view it.' name=''>
2016-02-02T10:38:34: Client 0: read EOF
2016-02-02T10:38:34: Client 0: shut down complete - bye!

PHD reports that it cannot connect to This email address is being protected from spambots. You need JavaScript enabled to view it.