토렌트 머신으로 사용할 때 Transmission을 설치해서 사용한다. 우분투에서도 https://blog.dasomoli.org/raspberrypi-torrent-%eb%a8%b8%ec%8b%a0-%eb%a7%8c%eb%93%a4%ea%b8%b0/ 의 내용을 그대로 설정하면 된다. 이대로 설정하면 http 프로토콜을 이용하게 되는데, 여기서 한 단계 더 나아가서 SSL 설정을 통해 https를 쓰도록 설정하자. letsencrypt 인증서를 사용하는 certbot을 사용하면, 설정은 매우 간단하다.

# certbot --apache

실행 예제 화면은 다음과 같다.

root@bamtol:/etc/letsencrypt# certbot --apache
Saving debug log to /var/log/letsencrypt/letsencrypt.log

Which names would you like to activate HTTPS for?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1: blog.dasomoli.org
2: torrent.dasomoli.org
3: www.dasomoli.org
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel): 2

Requesting a certificate for torrent.dasomoli.org

Successfully received certificate.
Certificate is saved at: /etc/letsencrypt/live/torrent.dasomoli.org/fullchain.pem
Key is saved at:         /etc/letsencrypt/live/torrent.dasomoli.org/privkey.pem
This certificate expires on 2023-06-07.
These files will be updated when the certificate renews.

Deploying certificate
Successfully deployed certificate for torrent.dasomoli.org to /etc/apache2/sites-available/torrent.dasomoli.org-le-ssl.conf
Congratulations! You have successfully enabled HTTPS on https://torrent.dasomoli.org

NEXT STEPS:
- The certificate will need to be renewed before it expires. Certbot can automatically renew the certificate in the background, but you may need to take steps to enable that functionality. See https://certbot.org/renewal-setup for instructions.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
If you like Certbot, please consider supporting our work by:
 * Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
 * Donating to EFF:                    https://eff.org/donate-le
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

그럼 /etc/apache2/sites-enabled/torrent.dasomoli.org-le-ssl.conf 파일이 생성되는데 여기에 SSLProxyEngine on 옵션을 추가해준다. 그럼 이렇게 된다.

<IfModule mod_ssl.c>
<VirtualHost *:443>
        # The ServerName directive sets the request scheme, hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts, the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is used as a last resort host regardless.
        # However, you must set it for any further virtual host explicitly.
        ServerName torrent.dasomoli.org
        ServerAdmin dasomoli@gmail.com

        ProxyPass / http://localhost:9000/
        ProxyPassReverse / http://localhost:9000/

        # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
        # error, crit, alert, emerg.
        # It is also possible to configure the loglevel for particular
        # modules, e.g.
        #LogLevel info ssl:warn

        ErrorLog ${APACHE_LOG_DIR}/torrent.log
        CustomLog ${APACHE_LOG_DIR}/torrent.access.log combined

        # For most configuration files from conf-available/, which are
        # enabled or disabled at a global level, it is possible to
        # include a line for only one particular virtual host. For example the
        # following line enables the CGI configuration for this host only
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf


SSLCertificateFile /etc/letsencrypt/live/torrent.dasomoli.org/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/torrent.dasomoli.org/privkey.pem
Include /etc/letsencrypt/options-ssl-apache.conf
SSLProxyEngine on
</VirtualHost>
</IfModule>

이게 끝. apache2 서비스를 재시작한 후 https로 접근한다.

우분투 24.04도 위와 같은 방식으로 설치 가능한데, workaround가 필요하다. appamor가 Nofity에 대해 잘 작동하지 않는 모양이다.

$ sudo systemctl edit --full transmission-daemon.service

Type=Simple로 바꾼다.

[Unit]
Description=Transmission BitTorrent Daemon
Wants=network-online.target
After=network-online.target

[Service]
User=debian-transmission
Type=Simple
ExecStart=/usr/bin/transmission-daemon -f --log-level=error
ExecReload=/bin/kill -s HUP $MAINPID
NoNewPrivileges=true
MemoryDenyWriteExecute=true
ProtectSystem=true
PrivateTmp=true

[Install]
WantedBy=multi-user.target