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@Zyxel_Charlie No, I do not use SD-WAN. It is just a stand-alone VPN50 device. I found the problem looking into DNS traffic that goes from VPN50's WAN interface (there is no such traffic on LAN interfaces) to DNS server, where mydomain.com is hosted. "mydomain.com" is just hided my domain name. I have found that there are…

As I understand, VPN50 uses alpha1.rpc.cubs.zyxel.com for some internal processes (a logic of Zyxel VPN50's developers). I do not use DNS records with *.zyxel.com. And it is strange to add my domain name to this address. Of course FQDN "alpha1.rpc.cubs.zyxel.com.mydomain.com" cannot be resolved, because it does not exist…

@Zyxel_Charlie I confirm that the problem disappeared on VPN50 V4.60(ABHL.0)ITS-2020-11-22-201100284 / 2020-11-22 15:52:44. Thanks a lot!

One more interesting point: VPN50 does not support a comma separated list in a command like shown below. It may be a problem. Router# show matching mac oui LAN1_POOL,Static_LAN1_xxxxxxxxxxxx % (after 'oui'): Parse error retval = -1 ERROR: Parse error/command not found! Router# show matching mac oui LAN1_POOL No. MAC OUI…

@Zyxel_Charlie May you add several static DHCP records to LAN1 and check how GUI works on 4.60?

I have deleted manually (via command line) static DHCP records for LAN1 interface. And now it works - see a picture below. So, the bug is related with static DHCP records. Router# configure terminal Router(config)# interface lan1 Router(config-if-lan1)# no ip dhcp-pool Static_LAN1_xxxxxxxxxxxx Router(config-if-lan1)# no ip…

No. It does not. I see the following problem: After sending commands from 0 to 24 as shown on a picture below, a response like zyshdata + i was returned only for 0 to 16 commands. There is no response for commands 17 - 24. The first command of this list is

Same problem on other PC and router: Zyxel VPN 50, V4.60(ABHL.0) / 2020-10-17 04:44:36