USG20 Contamination, Plex media server gone
Hello everybody, i try to describe my network: ISP Router (10.1.1.1/28) -> DMZ USG20 Wan (10.1.1.2/28), in DMZ there is also a Synology NAS which i use as web server (10.1.1.5/28), behinde the USG there are 2 LAN, 1st 192.168.1.1/28 and there is another Synology NAS (192.168.1.3), 2nd LAN is for client DHCP such as mobile, laptop, tv, etc... with net ID 192.168.100.0/24
Now the problem: i've Plex installed on both NAS. Plex since a couple of month stops find my local server (the two NAS with same error). I din't touched firewall rules since one year.
I reinstalled with a clear Plex installation on both NAS and upgraded to last version but same problem. So i decided to isolate firewall, i connected my laptop directly to the ISP Router and disconnected USG from it. Now the NAS in DMZ is working fine, when i reconnect the USG WAN, it stop to work again. What fu**** is noing my firewall's WAN in DMZ? why with USG disconnected from the network, Plex work? I didn't find anyting in the verbose logs about wan activity, but it says NAS (10.1.1.5:XXXXX) to 10.1.1.15 (network broadcast address /28) - ACCESS BLOCKED by default rule.... (?????) why my firewall should block the NAS outside the WAN in DMZ? Could it be the problem? i don't think so, but why it's is working in this way? Of course my 2nd NAS in LAN has the same problem but logs doesn't catch any irregular activities about its IP. So... i suspect my firewall is "cotaminating" my network with something "dirth" (ARP tables, routing) i reset it and configure basically with the same DMZ and the LAN for the NAS, alla ports opened, no fw rules active. It gives the same problem and the same log about my NAS in DMZ correlate to the broadcast address blocked by the firewall autoside its domain. I don't know what to do anymore, i tryed to exclude everything, wifi, multimedia devices, home devices.. only me and it. USG20 is the problem but i cannot catch it.
Please help, make me alla questions you need.
Thanks, many many thanks to who will give help.
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