3 ms·dict ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp sftp smtp smtps telnet tftpby staunch 12y agodict ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp sftp smtp smtps telnet tftpe12e 12y agoAnd if you want to go explore, you could continue with everything (not all are plain text!) in: /etc/services ...staunch 12y agoWell, that list is things curl supports.