Hi Guys
I have the same problem on my SSG350M - My DDNS doesnt seem to update - i run sooo many juniper firewalls and connect most of them via VPN (DYN DNS) - all of them work fine except this one (SSG350) - ive tried to troubleshoot but i still get nowhere.
Anyone got any ideas on how to fix it..........the way i fix it is, i copy the ADSL ip and log into dyndns.com and paste the ip onto the hostname that needs it - - booom it works,,,,,,,,its not the right way but it does work until the ADSL IP changes....the other way to fix it is to download the DYN DNS client and run that from inside the network.......that also works very well.
Hope the info helps
Andrew