Mactan Network uses now an automated SSL certificate from Let's Encrypt which should be renewing itself periodically.
All direct requests to Mactan Network using insecure HTTP protocol should be automatically redirected to HTTPS.
All post templates and automatically generated content should be linking resources through HTTPS.
All automatically managed content like diplomacy or dossiers should be regenerated within one day from now.
What's not fixed
All old unmaintained posts published by members of The Lane Hackers or manually through official accounts will be still containing resource linking through insecure HTTP. This should not be an issue now, as even more restrictive browsers like Brave should be able to upgrade resources to HTTPS on the fly. However, the situation can still be improved by the DiscoveryGC Forum administrators by one of the following methods.
By modifying PHPBB regex for image embeds to change the http to schema less link.
By doing an SQL update on posts replacing 'http://lh.discoverygc.com' string with 'https://lh.discoverygc.com'
Several unnecessary disclaimers
Since June 2018 I am no longer a leader/member of The Lane Hackers official faction.
I have quit DiscoveryGC back then and broke my 13-year long addiction to Freelancer and I am clean 2 full calendar years in row!
I am not actively maintaining or developing Mactan Network.
I am only hosting and occasionally troubleshooting The Mactan Network out of pure courtesy towards people and project I have dedicated to so many years in the past.
Mactan Network was initially developed in 2012 using technologies considered modern at the time of development but which are severely outdated by today's standards.
At the same time it is a huge and complex system automating majority of complex faction management procedures with only a small fraction of its features being publicly visible.
In short: every time I am asked to fix something it's a real pain in the bottom. Don't bring me pain.