弊ぼっちはLet's Encryptさんですごやんしんくだちい

$ :| openssl s_client -connect mastodon.zunda.ninja:443 > /dev/null
depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X1
verify return:1
depth=1 C = US, O = Let's Encrypt, CN = R3
verify return:1
depth=0 CN = mastodon.zunda.ninja
verify return:1
DONE