概要
検証用途で一時的に起動させる方法を紹介します
環境
- Ubuntu 24.04
- openssh-server 9.6p1
ホスト鍵作成
mkdir -p /tmp/sshd-legacy-test
if [ ! -f /tmp/sshd-legacy-test/ssh_host_rsa_key ]; then
ssh-keygen -q -t rsa -b 2048 -f /tmp/sshd-legacy-test/ssh_host_rsa_key -N ''
fi
設定ファイル作成
cat > /tmp/sshd-legacy-test/sshd_config <<'EOF'
Port 2222
ListenAddress 127.0.0.1
HostKey /tmp/sshd-legacy-test/ssh_host_rsa_key
PidFile /tmp/sshd-legacy-test/sshd.pid
LogLevel VERBOSE
UsePAM no
PasswordAuthentication no
KbdInteractiveAuthentication no
ChallengeResponseAuthentication no
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys
PermitRootLogin no
AllowUsers devops
X11Forwarding no
AllowTcpForwarding no
PrintMotd no
Subsystem sftp internal-sftp
KexAlgorithms +diffie-hellman-group14-sha1
HostKeyAlgorithms +ssh-rsa
PubkeyAcceptedAlgorithms +ssh-rsa
EOF
設定ファイル確認
-
/usr/sbin/sshd -t -f /tmp/sshd-legacy-test/sshd_config
起動
-
/usr/sbin/sshd -D -e -f /tmp/sshd-legacy-test/sshd_config
-
ss -ltn | grep ':2222 '
停止
if [ -f /tmp/sshd-legacy-test/sshd.pid ]; then
kill "$(cat /tmp/sshd-legacy-test/sshd.pid)"
fi
