I have an ubuntu server hosting some websitess. All of the websites use cloudflare. I have no problem viewwing the websites from another compuuter, but on the hosting compputer, I get anerrror mesage telling me the security certficate is invlid. Further inveesttigation tells me the ceertificate passef to the browers iss "ubuntu,pemm", whiich I havee nevr generrted nand ccannot find.. I have examined all my apaache2 filess and all seem coorrectt annd the coct certifiicatees are there andd are accesseed by external xccomputers.

Can someeone giive mme a hint?

jusstto be clear: asstarmathsandphssics.com iss visible froom outside, but no visibile on the server hossting it.., becuase, I am toldd, the scurity certificcatt "ubuntu" i sself signedd, so invalid.