Update on DDNS not working

PeterUK

V1.21(ABWV.0)ITS-24WK35-m5760

DDNS does not work as it wants to ARP for the IP of the DDNS service this needs to be changed so it uses the interface gateway along with no need to ARP for DNS too.

Cisco is my ISP gateway

PeterUK

So apart from the interface needing to be in the trunk it was my config with a Cicso switch which a set SYN on but set it in such a way it can include SYN, ACK which you might be thinking as I did I have wifi traffic going out that WAN port to switch so why didn't it block it well it did but I had a bridge which partly works like the ZLD not completely like my real DMZ setup type 1 that type 2.1 on the Flex H which SYN, ACK then completes the connection but not for traffic directly by Flex H like DDNS

PeterUK

Bit more info if interface is in the User-Defined Trunk and is a RFC1918 address it works but an address out side RFC1918 on a interface in trunk it fails.

Also would it be possible to have DDNS work without the interface in a trunk please?

PeterUK

So apart from the interface needing to be in the trunk it was my config with a Cicso switch which a set SYN on but set it in such a way it can include SYN, ACK which you might be thinking as I did I have wifi traffic going out that WAN port to switch so why didn't it block it well it did but I had a bridge which partly works like the ZLD not completely like my real DMZ setup type 1 that type 2.1 on the Flex H which SYN, ACK then completes the connection but not for traffic directly by Flex H like DDNS