@pete_c
I found an interesting issue, and haven't had the time to use wireshark to see what is up! As we previously discussed I used a GL-iNet Mango router as a gateway from main network to OMNI as you described on HOMESEER.
As I mentioned in my other posts, I have experienced packet loss, to where I can no longer communicate to OMNI II panel on it's subnet. The strange thing is, when I reboot my MODEM (setup as PASS-THROUGH to my business router), I can once again access my OMNI II w/ SPACE or SNAPLINK. As time goes by I start suffering packet loss, and ability to communicate to OMNI II takes longer to connect. When I use Putty to access and Ping I see about 20%-50% (or more) packet loss after 4 days.
Not sure how the modem can cause this, but I have noticed before when I can't communicate (local network), and if I reboot the MODEM then packet loss is minimal. The router feature of the modem is turned off, but when time permits I will see if something in modem settings might be causing conflict (MODEM is on a different subnet on the WAN side of main router).
Below is ping results after 4 days rebooting MODEM (Subnet is hidden for security reasons).
BusyBox v1.30.1 () built-in shell (ash)
_______ ________ __
| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
-----------------------------------------------------
OpenWrt 19.07.8, r11364-xxxxxxxxxxxxxxx
-----------------------------------------------------
root@GL-MT300N-V2:~# ping 192.168..x.x
PING 192.168.8.101 (192.168.x.x): 56 data bytes
64 bytes from 192.168.x.x: seq=0 ttl=64 time=32.704 ms
64 bytes from 192.168.x.x:: seq=1 ttl=64 time=3.032 ms
64 bytes from 192.168.x.x: seq=2 ttl=64 time=2.939 ms
64 bytes from 192.168.x.x: seq=4 ttl=64 time=2.839 ms
64 bytes from 192.168.x.x: seq=6 ttl=64 time=2.914 ms
64 bytes from 192.168.x.x:seq=7 ttl=64 time=2.879 ms
64 bytes from 192.168.x.x: seq=8 ttl=64 time=3.046 ms
64 bytes from 192.168.x.x:seq=10 ttl=64 time=9.336 ms
64 bytes from 192.168.x.x: seq=11 ttl=64 time=2.834 ms
64 bytes from 192.168.x.x: seq=12 ttl=64 time=3.154 ms
64 bytes from 192.168.x.x: seq=13 ttl=64 time=20.898 ms
64 bytes from 192.168.x.x:seq=14 ttl=64 time=4.270 ms
64 bytes from 192.168.x.x: seq=15 ttl=64 time=2.894 ms
64 bytes from 192.168.x.x:: seq=16 ttl=64 time=2.832 ms
64 bytes from 192.168.x.x: seq=18 ttl=64 time=3.144 ms
^C
--- 192.192.168.x.x ping statistics ---
19 packets transmitted, 15 packets received, 21% packet loss
round-trip min/avg/max = 2.832/6.647/32.704 ms
root@GL-MT300N-V2:~#
Not sure why MODEM would cause Packet Loss on from WAN site of MAIN Router. This is my second GL-iNet router (first one failed and wouldn't maintain settings, even after factory refresh). I have setup port forward as you described above.
I'm suspicious the GL-iNet might not be playing well, since the second one is acting like the original, but at least it maintains its settings.