Ubuntu Server 20.04でサーバー構築 Apache、Mail、FTPサーバーSSL化(Let's Encrypt)

Contents

1. 証明書を取得する (Let's Encrypt)
- 1.1 事前準備
2. Apache2にSSL/TLS(Let's Encrypt) の設定
3. メールサーバーにSSL/TLS(Let's Encrypt) の設定
4. FTP Vsftpd にSSL/TLS(Let's Encrypt) の設定

1. 証明書を取得する (Let's Encrypt)

1.1 事前準備

①mod_sslを有効にする

# a2enmod ssl

1	# a2enmod ssl

②Let's Encrypt証明書を取得するためのクライアントツールをインストール

# apt -y install certbot

1	# apt -y install certbot

③Let's Encrypt証明書の取得
Apache httpd や Nginx などの Webサーバーが稼働していることが前提となります。
作業を実施するサーバーで Webサーバーが稼働していない場合は ④の手順を実行。
また、インターネット側から、作業を実施するサーバー (証明書を取得したい FQDN のサーバー) の 80 ポート宛てにアクセス可能であることも前提です。

# certbot certonly --webroot -w /var/www/html/<FQDN> -d <FQDN>

1	# certbot certonly --webroot -w /var/www/html/<FQDN> -d <FQDN>

# [--webroot] 指定で稼働中 Web サーバーの公開ディレクトリ配下を認証用の一時領域に使用
# -w [ドキュメントルート] -d [証明書を取得したいFQDN] # FQDN (Fully Qualified Domain Name) : ホスト名.ドメイン名を省略なしで表記
# ドキュメントルートはバーチャルホストで複数のホスト定義がある場合、該当するホスト定義のものを指定
# ドキュメントルート指定の動作としては, 指定したドキュメントルート配下に
# [.well-known] ディレクトリが作成され, 認証用のファイルが自動的,一時的に設置されるのみ
# 初回のみメールアドレスの登録と利用条件への同意が必要
# 受信可能なメールアドレスを指定

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Enter email address (used for urgent renewal and security notices)
(Enter 'c' to cancel): <mail address>

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must
agree in order to register with the ACME server. Do you agree?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: y

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Would you be willing, once your first certificate is successfully issued, to
share your email address with the Electronic Frontier Foundation, a founding
partner of the Let's Encrypt project and the non-profit organization that
develops Certbot? We'd like to send you email about our work encrypting the web,
EFF news, campaigns, and ways to support digital freedom.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: y
Account registered.
Requesting a certificate for <FQDN>

Successfully received certificate.
Certificate is saved at: /etc/letsencrypt/live/<FQDN>/fullchain.pem
Key is saved at: /etc/letsencrypt/live/<FQDN>/privkey.pem
This certificate expires on 2022-09-22.
These files will be updated when the certificate renews.
Certbot has set up a scheduled task to automatically renew this certificate in the background.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Saving debug log to /var/log/letsencrypt/letsencrypt.log

Enter email address (used for urgent renewal and security notices)

(Enter 'c' to cancel): <mail address>

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Please read the Terms of Service at

https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must

agree in order to register with the ACME server. Do you agree?

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

(Y)es/(N)o: y

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Would you be willing, once your first certificate is successfully issued, to

share your email address with the Electronic Frontier Foundation, a founding

partner of the Let's Encrypt project and the non-profit organization that

develops Certbot? We'd like to send you email about our work encrypting the web,

EFF news, campaigns, and ways to support digital freedom.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

(Y)es/(N)o: y

Account registered.

Requesting a certificate for <FQDN>

Successfully received certificate.

Certificate is saved at: /etc/letsencrypt/live/<FQDN>/fullchain.pem

Key is saved at: /etc/letsencrypt/live/<FQDN>/privkey.pem

This certificate expires on 2022-09-22.

These files will be updated when the certificate renews.

Certbot has set up a scheduled task to automatically renew this certificate in the background.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

「Successfully received certificate.」と表示されれば成功
# メッセージ中に記載の通り [/etc/letsencrypt/live/<FQDN>/] 配下に次の証明書が取得されている

# cert.pem ⇒ SSLサーバー証明書(公開鍵含む)
# chain.pem ⇒ 中間証明書
# fullchain.pem ⇒ cert.pem と chain.pem が結合されたファイル
# privkey.pem ⇒ 公開鍵に対する秘密鍵

④Webサーバーが稼働していない場合のLet's Encrypt証明書の取得
インターネット側から当作業を実施するサーバーの 80 ポート宛てにアクセス可能であることは前提となります

# [--standalone] 指定で簡易 Webサーバー機能を使用
# -d [証明書を取得したいFQDN] # FQDN (Fully Qualified Domain Name) : ホスト名.ドメイン名を省略なしで表記
# 証明書を取得したいFQDNが複数ある場合は、-d [証明書を取得したいFQDN] を複数指定

# certbot certonly --standalone -d <FQDN>

1	# certbot certonly --standalone -d <FQDN>

Enter email address (used for urgent notices and lost key recovery)

<mail address>

< OK > <Cancel>

# 利用条件に同意する
Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf.
You must agree in order to register with the ACME server at
https://acme-v01.api.letsencrypt.org/directory

<Agree > <Cancel>

IMPORTANT NOTES:
- Congratulations! Your certificate and chain have been saved at:
/etc/letsencrypt/live/<FQDN>/fullchain.pem
Your key file has been saved at:
/etc/letsencrypt/live/<FQDN>/privkey.pem
Your cert will expire on 2019-10-23. To obtain a new or tweaked
version of this certificate in the future, simply run certbot
again. To non-interactively renew *all* of your certificates, run
"certbot renew"
- Your account credentials have been saved in your Certbot
configuration directory at /etc/letsencrypt. You should make a
secure backup of this folder now. This configuration directory will
also contain certificates and private keys obtained by Certbot so
making regular backups of this folder is ideal.
- 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/donat

Enter email address (used for urgent notices and lost key recovery)

< OK > <Cancel>

# 利用条件に同意する

Please read the Terms of Service at

https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf.

You must agree in order to register with the ACME server at

https://acme-v01.api.letsencrypt.org/directory

IMPORTANT NOTES:

- Congratulations! Your certificate and chain have been saved at:

/etc/letsencrypt/live/<FQDN>/fullchain.pem

Your key file has been saved at:

/etc/letsencrypt/live/<FQDN>/privkey.pem

Your cert will expire on 2019-10-23. To obtain a new or tweaked

version of this certificate in the future, simply run certbot

again. To non-interactively renew *all* of your certificates, run

"certbot renew"

- Your account credentials have been saved in your Certbot

configuration directory at /etc/letsencrypt. You should make a

secure backup of this folder now. This configuration directory will

also contain certificates and private keys obtained by Certbot so

making regular backups of this folder is ideal.

- 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/donat

⑤取得済みの証明書を更新する

# 有効期限が 30日未満の証明書を全て更新
# 有効期限の残り日数に関わらず更新したい場合は [--force-renewal] を合わせて指定

# certbot  [--force-renewal]  renew

1	# certbot [--force-renewal] renew

2. Apache2にSSL/TLS(Let's Encrypt) の設定

①Apache2のSSL関連設定ファイルの編集

# cd /etc/apache2/sites-available/
# cp default-ssl.conf hoge.com-ssl.conf

1 2	# cd /etc/apache2/sites-available/ # cp default-ssl.conf hoge.com-ssl.conf

# vi hoge.com-ssl.conf

# 3行目：管理者アドレス変更
ServerAdmin  hoge@hoge.com
# 5行目：変更
DocumentRoot /var/www/html/hoge.com
# 13,14行目：変更
ErrorLog ${APACHE_LOG_DIR}/hoge.com.error.log
CustomLog ${APACHE_LOG_DIR}/hoge.com.access.log combined
# 32,33行目：[1]で取得した証明書に変更
SSLCertificateFile      /etc/letsencrypt/live/hoge.com/cert.pem
SSLCertificateKeyFile   /etc/letsencrypt/live/hoge.com/privkey.pem
# 42行目：コメント解除して[1]で取得したチェインファイルに変更
SSLCertificateChainFile /etc/letsencrypt/live/hoge.com/chain.pem

# vi hoge.com-ssl.conf

# 3行目：管理者アドレス変更

ServerAdmin hoge@hoge.com

# 5行目：変更

DocumentRoot /var/www/html/hoge.com

# 13,14行目：変更

ErrorLog ${APACHE_LOG_DIR}/hoge.com.error.log

CustomLog ${APACHE_LOG_DIR}/hoge.com.access.log combined

# 32,33行目：[1]で取得した証明書に変更

SSLCertificateFile /etc/letsencrypt/live/hoge.com/cert.pem

SSLCertificateKeyFile /etc/letsencrypt/live/hoge.com/privkey.pem

# 42行目：コメント解除して[1]で取得したチェインファイルに変更

SSLCertificateChainFile /etc/letsencrypt/live/hoge.com/chain.pem

②設定ファイルの反映と有効化

# a2ensite hoge.com-ssl.conf
Enabling site hoge.com-ssl.conf.
To activate the new configuration, you need to run:
systemctl reload apache2

# a2ensite hoge.com-ssl.conf

Enabling site hoge.com-ssl.conf.

To activate the new configuration, you need to run:

systemctl reload apache2

# systemctl restart apache2

1	# systemctl restart apache2

# a2dissite default-ssl.conf　　デフォルト無効化

1	# a2dissite default-ssl.conf　　デフォルト無効化

# systemctl restart apache2

1	# systemctl restart apache2

# a2enmod ssl
Considering dependency setenvif for ssl:
Module setenvif already enabled
Considering dependency mime for ssl:
Module mime already enabled
Considering dependency socache_shmcb for ssl:
Enabling module socache_shmcb.
Enabling module ssl.
See /usr/share/doc/apache2/README.Debian.gz on how to configure SSL and create self-signed certificates.
To activate the new configuration, you need to run:
systemctl restart apache2

# a2enmod ssl

Considering dependency setenvif for ssl:

Module setenvif already enabled

Considering dependency mime for ssl:

Module mime already enabled

Considering dependency socache_shmcb for ssl:

Enabling module socache_shmcb.

Enabling module ssl.

See /usr/share/doc/apache2/README.Debian.gz on how to configure SSL and create self-signed certificates.

To activate the new configuration, you need to run:

systemctl restart apache2

③httpからhttpsリダイレクト

１．.htaccessファイル　を作成する方法
.htaccessを/var/www/html/hoge.com/に作成して以下記入

RewriteEngine on
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

RewriteEngine on

RewriteCond %{HTTPS} off

RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

２．/vhost-hoge.com.conf に記入の方法

# vi /etc/apache2/sites-available/vhost-hoge.com.conf
RewriteEngine on
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

# vi /etc/apache2/sites-available/vhost-hoge.com.conf

RewriteEngine on

RewriteCond %{HTTPS} off

RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

④設定反映と起動

# a2ensite vhost-hoge.com.conf

1	# a2ensite vhost-hoge.com.conf

# a2enmod ssl

1	# a2enmod ssl

Apache再起動

# systemctl restart apache2

1	# systemctl restart apache2

3. メールサーバーにSSL/TLS(Let's Encrypt) の設定

3.1 バーチャルホスト設定と証明書取得

①Apacheのバーチャルホストにメールホストを設定

# cd /etc/apache2/sites-available/
# vi vhost-hoge.com.conf

1 2	# cd /etc/apache2/sites-available/ # vi vhost-hoge.com.conf

webサービス用のバーチャルホスト設定の下に次のメール用バーチャルホストの設定を追記

<VirtualHost *:80>

～省略～

ServerName mail.hoge.com

ServerAdmin hoge@hoge.com

DocumentRoot /var/www/html/mail.hoge.com

　　　　～省略～

ErrorLog ${APACHE_LOG_DIR}/mail.hoge.com.error.log

CustomLog ${APACHE_LOG_DIR}/mail.hoge.com.access.log combined

　　　　～省略

</VirtualHost>

～省略～

ServerName mail.hoge.com

ServerAdmin hoge@hoge.com

DocumentRoot /var/www/html/mail.hoge.com

　　　　～省略～

ErrorLog ${APACHE_LOG_DIR}/mail.hoge.com.error.log

CustomLog ${APACHE_LOG_DIR}/mail.hoge.com.access.log combined

　　　　～省略

</VirtualHost>

②/var/www/html/にmail.hoge.comディレクトリー作成

③メールサーバー用のletsencrypt SSL証明書の取得

# certbot certonly --webroot -w /var/www/html/mail.hoge.com -d mail.hoge.com

1	# certbot certonly --webroot -w /var/www/html/mail.hoge.com -d mail.hoge.com

3.2 Postfix の設定

④Postfixの設定ファイルを修正
暗号化通信ができるよう SSL/TLS の設定をします。
SMTPS は 465/TCP, POP3S は 995/TCP, IMAPS は 993/TCP を使用します。

# vi /etc/postfix/main.cf

# 最終行に追記
smtpd_use_tls = yes
smtp_tls_mandatory_protocols = !SSLv2, !SSLv3
smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
smtpd_tls_cert_file = /etc/letsencrypt/live/mail.hoge.com/fullchain.pem
smtpd_tls_key_file = /etc/letsencrypt/live/mail.hoge.com/privkey.pem
smtpd_tls_session_cache_database = btree:/etc/postfix/smtpd_scache
# 暗号に関する情報を "Received:" メッセージヘッダに含める
smtpd_tls_received_header = yes

# vi /etc/postfix/main.cf

# 最終行に追記

smtpd_use_tls = yes

smtp_tls_mandatory_protocols = !SSLv2, !SSLv3

smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3

smtpd_tls_cert_file = /etc/letsencrypt/live/mail.hoge.com/fullchain.pem

smtpd_tls_key_file = /etc/letsencrypt/live/mail.hoge.com/privkey.pem

smtpd_tls_session_cache_database = btree:/etc/postfix/smtpd_scache

# 暗号に関する情報を "Received:" メッセージヘッダに含める

smtpd_tls_received_header = yes

# vi /etc/postfix/master.cf

submission inet n – y – – smtpd　←以下、コメントを外します。（SSL,STARTTLSどちらにも対応）
-o syslog_name=postfix/submission
-o smtpd_tls_security_level=encrypt
-o smtpd_sasl_auth_enable=yes
# -o smtpd_tls_auth_only=yes
# -o smtpd_reject_unlisted_recipient=no
-o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
-o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING

smtps inet n – y – – smtpd
-o syslog_name=postfix/smtps
-o smtpd_tls_wrappermode=yes
-o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
-o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
-o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n – y – – qmqpd

# vi /etc/postfix/master.cf

submission inet n – y – – smtpd　←以下、コメントを外します。（SSL,STARTTLSどちらにも対応）

-o syslog_name=postfix/submission

-o smtpd_tls_security_level=encrypt

-o smtpd_sasl_auth_enable=yes

# -o smtpd_tls_auth_only=yes

# -o smtpd_reject_unlisted_recipient=no

-o smtpd_client_restrictions=$mua_client_restrictions

# -o smtpd_helo_restrictions=$mua_helo_restrictions

# -o smtpd_sender_restrictions=$mua_sender_restrictions

# -o smtpd_recipient_restrictions=

-o smtpd_relay_restrictions=permit_sasl_authenticated,reject

# -o milter_macro_daemon_name=ORIGINATING

smtps inet n – y – – smtpd

-o syslog_name=postfix/smtps

-o smtpd_tls_wrappermode=yes

-o smtpd_sasl_auth_enable=yes

# -o smtpd_reject_unlisted_recipient=no

# -o smtpd_client_restrictions=$mua_client_restrictions

-o smtpd_helo_restrictions=$mua_helo_restrictions

# -o smtpd_sender_restrictions=$mua_sender_restrictions

# -o smtpd_recipient_restrictions=

-o smtpd_relay_restrictions=permit_sasl_authenticated,reject

# -o milter_macro_daemon_name=ORIGINATING

#628 inet n – y – – qmqpd

設定に誤りがないかチェック（なにも表示されなければOKです）

# postfix check

1	# postfix check

⑤Postfixの起動、自動起動の設定

# systemctl start postfix
# systemctl enable postfix

1 2	# systemctl start postfix # systemctl enable postfix

3.3 Dovecot の設定

①Dovecotの設定ファイルを修正

# vi /etc/dovecot/conf.d/10-ssl.conf

# 6行目：変更
ssl = yes
# 12,13行目：コメント解除して証明書/鍵ファイル指定
ssl_cert = </etc/letsencrypt/live/mail.hoge.com/fullchain.pem
ssl_key = </etc/letsencrypt/live/mail.hoge.com/privkey.pem

# vi /etc/dovecot/conf.d/10-ssl.conf

# 6行目：変更

ssl = yes

# 12,13行目：コメント解除して証明書/鍵ファイル指定

ssl_cert = </etc/letsencrypt/live/mail.hoge.com/fullchain.pem

ssl_key = </etc/letsencrypt/live/mail.hoge.com/privkey.pem

・暗号化を使う imaps と pop3s を有効にして、平文で通信する imap と pop3 は「port = 0」を設定し無効にします。

# vi /etc/dovecot/conf.d/10-master.conf

1	# vi /etc/dovecot/conf.d/10-master.conf

service imap-login {
inet_listener imap {
#port = 143
port = 0
}
inet_listener imaps {
#port = 993
#ssl = yes
port = 993
ssl = yes
}
}service pop3-login {
inet_listener pop3 {
#port = 110
port = 0
}
inet_listener pop3s {
#port = 995
#ssl = yes
port = 995
ssl = yes
}
}
・Dovecot SASL ライブラリの認証ソケットファイルを指定（113行目あたりです）service auth {
　（略）
# Postfix smtp-auth
#unix_listener /var/spool/postfix/private/auth {
# mode = 0666
#}
　↓
unix_listener /var/spool/postfix/private/auth {
mode = 0666
user = postfix
group = postfix
}
}

service imap-login {

inet_listener imap {

#port = 143

port = 0

}

inet_listener imaps {

#port = 993

#ssl = yes

port = 993

ssl = yes

}

}service pop3-login {

inet_listener pop3 {

#port = 110

port = 0

}

inet_listener pop3s {

#port = 995

#ssl = yes

port = 995

ssl = yes

}

・Dovecot SASL ライブラリの認証ソケットファイルを指定（113行目あたりです）service auth {

　（略）

# Postfix smtp-auth

#unix_listener /var/spool/postfix/private/auth {

# mode = 0666

　↓

unix_listener /var/spool/postfix/private/auth {

mode = 0666

user = postfix

group = postfix

}

・認証方式の設定　※平文パスワードを許可していますが、SSL/TLSで暗号化されますので問題ありません

# vi /etc/dovecot/conf.d/10-auth.conf

#disable_plaintext_auth = yes　　　→　　disable_plaintext_auth = no
auth_mechanisms = plain　　→　auth_mechanisms = plain login

# vi /etc/dovecot/conf.d/10-auth.conf

#disable_plaintext_auth = yes　　　→　　disable_plaintext_auth = no

auth_mechanisms = plain　　→　auth_mechanisms = plain login

・メールボックスの場所を指定

# vi /etc/dovecot/conf.d/10-mail.conf

#mail_location =　　　→　　mail_location = maildir:~/Maildir

# vi /etc/dovecot/conf.d/10-mail.conf

#mail_location =　　　→　　mail_location = maildir:~/Maildir

・ログの出力先を変更

# vi /etc/dovecot/conf.d/10-logging.conf

#log_path = syslog　　　→　　log_path = /var/log/dovecot/dovecot.log

# vi /etc/dovecot/conf.d/10-logging.conf

#log_path = syslog　　　→　　log_path = /var/log/dovecot/dovecot.log

・ログの出力先作成

# mkdir /var/log/dovecot

1	# mkdir /var/log/dovecot

② Dovecotの起動、自動起動の設定

# systemctl start dovecot
# systemctl enable dovecot

1 2	# systemctl start dovecot # systemctl enable dovecot

③認証ソケットファイルが作成されているのを確認

# ls -F /var/spool/postfix/private/auth
---(下記表示があればOK)---
/var/spool/postfix/private/auth =

# ls -F /var/spool/postfix/private/auth

---(下記表示があればOK)---

/var/spool/postfix/private/auth =

4. FTP Vsftpd にSSL/TLS(Let's Encrypt) の設定

① Vsftpdの設定ファイルを修正

# vi /etc/vsftpd.conf

#次を最終行に追記
# add letsencrypt
rsa_cert_file=/etc/letsencrypt/live/hoge.com/fullchain.pem
rsa_private_key_file=/etc/letsencrypt/live/hoge.com/privkey.pem
ssl_enable=YESforce_local_data_ssl=YES
force_local_logins_ssl=YES
ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO
#pasv port
pasv_enable=YES
pasv_min_port=21000
pasv_max_port=21010

再起動
# systemctl restart vsftpd

# vi /etc/vsftpd.conf

#次を最終行に追記

# add letsencrypt

rsa_cert_file=/etc/letsencrypt/live/hoge.com/fullchain.pem

rsa_private_key_file=/etc/letsencrypt/live/hoge.com/privkey.pem

ssl_enable=YESforce_local_data_ssl=YES

force_local_logins_ssl=YES

ssl_tlsv1=YES

ssl_sslv2=NO

ssl_sslv3=NO

#pasv port

pasv_enable=YES

pasv_min_port=21000

pasv_max_port=21010

再起動

# systemctl restart vsftpd

② Firewallの設定

ftpポート以外に固定したPASVポートを許可します。

# ufw allow 21000:21010/tcp
# ufw reload

1 2	# ufw allow 21000:21010/tcp # ufw reload

ページのトップへ