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Update SSH Hardening

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Tommy 2023-09-22 15:09:36 -07:00 committed by GitHub
parent ff6e6a57e9
commit e0d02f1c72
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 30 additions and 6 deletions
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5
GCP-Debian-11.sh
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@ -21,7 +21,10 @@ sudo ufw allow OpenSSH
echo 'GSSAPIAuthentication no echo 'GSSAPIAuthentication no
VerifyHostKeyDNS yes' | sudo tee /etc/ssh/ssh_config.d/10-custom.conf VerifyHostKeyDNS yes' | sudo tee /etc/ssh/ssh_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf
sudo sed -i 's/#GSSAPIAuthentication no/GSSAPIAuthentication no/g' /etc/ssh/sshd_config echo 'PasswordAuthentication no
KerberosAuthentication no
GSSAPIAuthentication no' | sudo tee /etc/ssh/sshd_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/sshd_config.d/10-custom.conf
sudo mkdir -p /etc/systemd/system/ssh.service.d sudo mkdir -p /etc/systemd/system/ssh.service.d
sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/ssh.service.d/override.conf sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/ssh.service.d/override.conf
sudo systemctl daemon-reload sudo systemctl daemon-reload

6
Proxmox-8.sh
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@ -11,8 +11,10 @@ systemctl restart chronyd
echo 'GSSAPIAuthentication no echo 'GSSAPIAuthentication no
VerifyHostKeyDNS yes' | tee /etc/ssh/ssh_config.d/10-custom.conf VerifyHostKeyDNS yes' | tee /etc/ssh/ssh_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf
sed -i 's/#PasswordAuthentication yes/PasswordAuthentication no/g' /etc/ssh/sshd_config echo 'PasswordAuthentication no
sed -i 's/#GSSAPIAuthentication no/GSSAPIAuthentication no/g' /etc/ssh/sshd_config KerberosAuthentication no
GSSAPIAuthentication no' | sudo tee /etc/ssh/sshd_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/sshd_config.d/10-custom.conf
mkdir -p /etc/systemd/system/ssh.service.d mkdir -p /etc/systemd/system/ssh.service.d
curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/ssh.service.d/override.conf curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/ssh.service.d/override.conf
systemctl daemon-reload systemctl daemon-reload

14
RHEL-Server-9.sh
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@ -19,9 +19,17 @@ mkdir -p /etc/ssh/ssh_config.d /etc/ssh/sshd_config.d
echo 'GSSAPIAuthentication no echo 'GSSAPIAuthentication no
VerifyHostKeyDNS yes' | sudo tee /etc/ssh/ssh_config.d/10-custom.conf VerifyHostKeyDNS yes' | sudo tee /etc/ssh/ssh_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf
echo 'X11Forwarding no echo 'HostKey /etc/ssh/ssh_host_ed25519_key
GSSAPIAuthentication no HostKeyAlgorithms ssh-ed25519
PasswordAuthentication no' | sudo tee /etc/ssh/sshd_config.d/10-custom.conf #KexAlgorithms sntrup761x25519-sha512@openssh.com
PubkeyAcceptedKeyTypes ssh-ed25519
Ciphers aes256-gcm@openssh.com
MACs -*
PasswordAuthentication no
PermitRootLogin no
KerberosAuthentication no
GSSAPIAuthentication no' | sudo tee /etc/ssh/sshd_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/sshd_config.d/10-custom.conf
sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/sshd.service.d/override.conf sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/sshd.service.d/override.conf
sudo systemctl daemon-reload sudo systemctl daemon-reload
sudo systemctl restart sshd sudo systemctl restart sshd

11
Ubuntu-22.04-Server.sh
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@ -31,6 +31,17 @@ sudo ufw allow OpenSSH
echo 'GSSAPIAuthentication no echo 'GSSAPIAuthentication no
VerifyHostKeyDNS yes' | sudo tee /etc/ssh/ssh_config.d/10-custom.conf VerifyHostKeyDNS yes' | sudo tee /etc/ssh/ssh_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf
echo 'HostKey /etc/ssh/ssh_host_ed25519_key
HostKeyAlgorithms ssh-ed25519
#KexAlgorithms sntrup761x25519-sha512@openssh.com
PubkeyAcceptedKeyTypes ssh-ed25519
Ciphers aes256-gcm@openssh.com
MACs -*
PasswordAuthentication no
PermitRootLogin no
KerberosAuthentication no
GSSAPIAuthentication no' | sudo tee /etc/ssh/sshd_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/sshd_config.d/10-custom.conf
sudo mkdir -p /etc/systemd/system/ssh.service.d sudo mkdir -p /etc/systemd/system/ssh.service.d
sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/ssh.service.d/override.conf sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/ssh.service.d/override.conf
sudo systemctl daemon-reload sudo systemctl daemon-reload