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Traceroute showed it reaching the destination.  Thanks for the reply.
Anyway, I browsed through all the configuration menus again and discovered in the NAT/Port Forwarding section a port 80 LAN rule to "redirect traffic to proxy". I edited it to "disable" and went back to the laptop and now everything works!  Not sure what it was for, I know I didn't write it but it sure was a nuisance.

My build is a couple weeks old, currently running Opnsense 25.7.11 and for the most part all is well....but my Linux Mint laptop and no longer access the Linux Mint servers for updates.  I've spent days trying various search results to no avail to correct this and finally gave up.  As an experiment I pulled my Opnsense router and reinstalled a TP-Link router and with it in place there is no problem.

My installation has very few firewall rules other than what is installed initially plus the ones Crowdsec and Intrusion Dection places.  I've looked through the extended firewall rules list using the (+) button to see if ports 80 and 443 have a block setting but my experience is limited in that regard.  An example is the connection error is "could not connect to security.unbuntu.com:80" and there  are bunch of similar type errors which prevent the updates.  Pings to the sites show the DNS is being resolved through Opnsense.

The laptop is trying to connect via wifi and all functions work except trying to do server updates.  Even connected directly via ethernet and same problem persists.

I am using DNSMasq DNS & DHCP.  My Opnsense upgrades work fine but have not moved to version 26.1 as yet.

Thanks for any guidance if you have the time to do so.

Yep I am using the one in the list  Intel Core CPU on die, looks like my only choice. It works on my other build but not this one.  Of course this is a different board, so the driver may be useless.--Thanks

I have Opnsense OPNsense 25.7.11_2-amd64 installed on two different mini-pcs, on one the temperatures are clearly visible and posted inside a green box on the other the text is white on white background and barely visible, plus the temperature is way off (.1C).  Should be near to 34 deg C since it is a fanless unit.  I am using Opnsense-Dark theme on both units, they are different brands but both Intel based.  Searches for the thermal sensor problem appear to be a little dated, I am using a current version of Opnsense so hopefully someone has an idea of a fix.--Thanks.

[Allow manual adjustment of DHCPv6 and Router Advertisements]

I have been fighting the DHCPv6 error msg all day, only way I could get rid of the warning and complete the setup of the LAN was at  the bottom of the Interfaces:Lan menu and and "tick" Manual Configuration Allow manual adjustment of DHCPv6 and Router Advertisements and the pink warning disappeared and was able to make changes to the Lan interface.  This also made visible the LAN interface in ISC DHCPv6 Services menu, before I could not see it.

Now I have to figure out why Opensense can no longer update my repositories without generating "Could not find the repository on the selected mirror" messages. Seems it can no longer resolve the mirrors for update package downloads.  Ended up fixing one problem and causing a new one..oh well.