119 lines
3.0 KiB
Bash
119 lines
3.0 KiB
Bash
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#!/bin/bash
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# Alpine Linux Hardening Script for Archipelago Bitcoin Node OS
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# This script applies security hardening to the Alpine base image
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set -e
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echo "🔒 Starting Alpine Linux hardening..."
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# Disable unnecessary services
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systemctl disable bluetooth || true
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systemctl disable avahi-daemon || true
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# Configure kernel parameters for security
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cat >> /etc/sysctl.conf <<EOF
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# Archipelago Security Hardening
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# Disable IP forwarding
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net.ipv4.ip_forward = 0
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net.ipv6.conf.all.forwarding = 0
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# Enable SYN flood protection
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net.ipv4.tcp_syncookies = 1
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# Disable source routing
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net.ipv4.conf.all.accept_source_route = 0
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net.ipv4.conf.default.accept_source_route = 0
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net.ipv6.conf.all.accept_source_route = 0
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net.ipv6.conf.default.accept_source_route = 0
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# Disable ICMP redirects
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net.ipv4.conf.all.accept_redirects = 0
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net.ipv4.conf.default.accept_redirects = 0
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net.ipv6.conf.all.accept_redirects = 0
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net.ipv6.conf.default.accept_redirects = 0
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# Disable send redirects
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.default.send_redirects = 0
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# Log martian packets
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net.ipv4.conf.all.log_martians = 1
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net.ipv4.conf.default.log_martians = 1
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# Ignore ICMP ping requests (can be enabled if needed)
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# net.ipv4.icmp_echo_ignore_all = 1
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# Ignore ICMP ping broadcasts
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net.ipv4.icmp_echo_ignore_broadcasts = 1
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# Ignore bogus ICMP errors
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net.ipv4.icmp_ignore_bogus_error_responses = 1
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# Enable RFC-recommended source validation
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net.ipv4.conf.all.rp_filter = 1
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net.ipv4.conf.default.rp_filter = 1
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# Disable IPv6 if not needed (uncomment if IPv6 not required)
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# net.ipv6.conf.all.disable_ipv6 = 1
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# net.ipv6.conf.default.disable_ipv6 = 1
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EOF
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# Configure SSH (if installed)
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if [ -f /etc/ssh/sshd_config ]; then
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sed -i 's/#PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config || true
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sed -i 's/#PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config || true
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sed -i 's/#PubkeyAuthentication yes/PubkeyAuthentication yes/' /etc/ssh/sshd_config || true
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fi
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# Set up fail2ban basic configuration
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if [ -f /etc/fail2ban/jail.conf ]; then
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cat > /etc/fail2ban/jail.local <<EOF
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[DEFAULT]
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bantime = 3600
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findtime = 600
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maxretry = 5
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destemail = root@localhost
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sendername = Fail2Ban
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action = %(action_)s
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[sshd]
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enabled = true
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port = ssh
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logpath = %(sshd_log)s
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backend = %(sshd_backend)s
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EOF
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fi
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# Configure automatic security updates
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cat > /etc/periodic/daily/archipelago-security-updates <<'EOF'
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#!/bin/sh
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# Automatic security updates for Archipelago
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apk update && apk upgrade -u || true
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EOF
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chmod +x /etc/periodic/daily/archipelago-security-updates
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# Set restrictive file permissions
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chmod 700 /var/lib/archipelago/secrets
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chmod 755 /var/lib/archipelago/apps
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chmod 755 /var/lib/archipelago/logs
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# Create log directory with proper permissions
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mkdir -p /var/log/archipelago
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chmod 755 /var/log/archipelago
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# Configure log rotation for archipelago logs
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cat > /etc/logrotate.d/archipelago <<EOF
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/var/log/archipelago/*.log {
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daily
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rotate 30
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compress
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delaycompress
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missingok
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notifempty
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create 0644 root root
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}
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EOF
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echo "✅ Alpine Linux hardening complete!"
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