I have been thinking about self-hosting my personal photos on my linux server. After the recent backdoor was detected I’m more hesitant to do so especially because i’m no security expert and don’t have the time and knowledge to audit my server. All I’ve done so far is disabling password logins and changing the ssh port. I’m wondering if there are more backdoors and if new ones are made I can’t respond in time. Appreciate your thoughts on this for an ordinary user.
The best you can do is use OSS software that has been battle tested. Stuff like OpenSSH and OpenVPN are very unlikely to have backdoors or major vulnerabilities currently being exploited. If you don’t trust something to not be vulnerable, you’re best to put it behind a more robust layer of authentication and access it only by those means.