I applied the pending updates yesterday and a couple things busted. This is a current UTM 9 machine with a single Comcast residential WAN link through a cable modem. It's been solid for years. The WAN interface is configured for dynamic IPv4 and IPv6 addresses and gateway options checked. IPv6 is enabled, I get a prefix delegation that I use for the primary LAN interface. I have IPv6 prefix advertising setup for the LAN interface using the delegation. I have IPv6 rewrite enabled. I applied the pending updates earlier this week when I was having odd DHCP issues. It's now running 9.509-3.
So, the first issue I had after the update was with HTTPS traffic and the transparent-mode web filter. I've had the "URL Filtering Only" option selected and it's been working fine before but after the update, it's messing with the certificates now and I don't bother to distribute the CA cert. I just disabled HTTPS proxying in transparent-mode and moved on.
The next issue has me stumped. The default IPv4 route is gone from Support > Advanced > Routes Table and pings to 8.8.8.8 get a no route error. If I disable the "IPv6 Default GW" option on the Comcast WAN interface, the IPv4 routes return to the Routes Table report. I've IPv6 Default GW disabled for now.
Also, IPv4 DHCP relaying from LAN2 (secondary internal LAN) through the UTM to a DHCP Server on LAN (primary internal LAN) isn't working unless I also disable the DHCPv6 Relay. That one took a while to figure out. The DHCP packets are never getting through to the server. If I disable the DHCPv6 Relay, IPv4 DHCP relaying works again.
Does any of this suggest anything specific I should dig deeper into? Any suggestions?
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