# Well known ports 0:1023 # Registered ports 1024:49151 # Goldielocks zone 32768:65535 # Dynamic/Private 49152:65535 # # WAN 86.83.121.29 # vps 185.66.250.42 # tor-exit 185.87.185.45 *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :clutter - [0:0] # Local loopback -A INPUT ! -i lo -d 127.0.0.0/8 -m limit --limit 5/min -j LOG --log-prefix "iptables dropped 127.0.0.0/8, from non localhost: " --log-level 7 -A INPUT ! -i lo -d 127.0.0.0/8 -j DROP -A INPUT -i lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT # Active connections -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A OUTPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT # Ping -A OUTPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT # FTP #-A OUTPUT -p tcp -m tcp --dport 21 -j ACCEPT #-A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 49152:65535 -j ACCEPT # SSH -A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m recent --set --name SSH --mask 255.255.255.255 --rsource -A INPUT -p tcp -m tcp --dport 22 -m limit --limit 5/min -m recent --rcheck --seconds 40 --hitcount 4 --rttl --name SSH --mask 255.255.255.255 --rsource -j LOG --log-prefix "iptalbes dropped SSH flood: " -A INPUT -p tcp -m tcp --dport 22 -m recent --update --seconds 40 --hitcount 4 --rttl --name SSH --mask 255.255.255.255 --rsource -j DROP -A INPUT -p tcp -m tcp --sport 1024:65535 --dport 22 -j ACCEPT -A OUTPUT -p tcp -m tcp --dport 22 -j ACCEPT #SMTP(S) -A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 25 -j ACCEPT # WHOIS -A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 43 -j ACCEPT # DNS -A OUTPUT -p udp -m udp --sport 1024:65535 --dport 53 -j ACCEPT # DHCP #-A INPUT -i eth0 -d 255.255.255.255 -p udp -m udp --sport 67 --dport 68 -m limit --limit 5/min -j LOG --log-prefix "iptables allowed DHCP: " --log-level 7 #-A INPUT -i eth0 -d 255.255.255.255 -p udp -m udp --sport 67 --dport 68 -j ACCEPT #-A OUTPUT -o eth0 -p udp -m udp --sport 68 --dport 67 -m limit --limit 5/min -j LOG --log-prefix "iptables allowed DHCP: " --log-level 7 #-A OUTPUT -o eth0 -p udp -m udp --sport 68 --dport 67 -j ACCEPT # HTTP & HTTPS -A INPUT -p tcp -m tcp --dport 80 -m state --state NEW -m recent --set --name HTTP --rsource -A INPUT -p tcp -m tcp --dport 80 -m recent --rcheck --seconds 30 --hitcount 20 --rttl --name HTTP --rsource -j LOG --log-prefix "iptables dropped HTTP flood: " --log-level 4 -A INPUT -p tcp -m tcp --dport 80 -m recent --update --seconds 30 --hitcount 20 --rttl --name HTTP --rsource -j DROP -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT -m comment --comment "Tor dir port" -A OUTPUT -p tcp -m tcp --dport 80 -j ACCEPT -A INPUT -p tcp -m tcp --dport 443 -m state --state NEW -m recent --set --name HTTPS --rsource -A INPUT -p tcp -m tcp --dport 443 -m recent --rcheck --seconds 30 --hitcount 20 --rttl --name HTTPS --rsource -j LOG --log-prefix "iptables dropped HTTPS flood: " --log-level 4 -A INPUT -p tcp -m tcp --dport 443 -m recent --update --seconds 30 --hitcount 20 --rttl --name HTTPS --rsource -j DROP -A INPUT -p tcp -m tcp --dport 443 -j ACCEPT -m comment --comment "Tor OR port" -A OUTPUT -p tcp -m tcp --dport 443 -j ACCEPT # NTP -A OUTPUT -p udp -m udp --dport 123 -j ACCEPT # IMAPs #-A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 143 -j ACCEPT -A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 993 -j ACCEPT # PIP #-A OUTPUT -d 185.31.17.223 -p tcp -m tcp --sport 32768:65535 --dport 443 -j ACCEPT -m comment --comment "pip" # SMTPs #-A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 587 -j ACCEPT # Socks5 #-A OUTPUT -p tcp -m tcp --sport 57448:65535 --dport 1080 -j ACCEPT # OpenVPN -A OUTPUT -p udp -m udp --dport 1194 -j ACCEPT -m comment --comment "OpenVPN" -A OUTPUT -d 224.0.0.252 -p udp -m udp --sport 5355 --dport 5355 -j ACCEPT -m comment --comment "OpenVPN" -A INPUT -d 224.0.0.252 -p udp -m udp --sport 5355 --dport 5355 -j ACCEPT -m comment --comment "OpenVPN" -A INPUT -d 224.0.0.1 -m pkttype --pkt-type multicast --protocol igmp -j ACCEPT -m comment --comment "OpenVPN" -A OUTPUT -d 224.0.0.22 --protocol igmp -j ACCEPT -m comment --comment "OpenVPN" -A INPUT -s 185.87.185.45 -p tcp -m tcp --sport 8118 --dport 57642 # OpenVPN #-A OUTPUT -p udp -m udp --sport 32768:65535 --dport 1194 -j ACCEPT #-A OUTPUT ! -o enp3s0 -p tcp -m tcp --sport 32768:65535 --dport 1024:65535 -j ACCEPT -m comment --comment "OpenVPN tunnel" #-A OUTPUT ! -o enp3s0 -p tcp -m tcp --sport 443 --dport 4063:65535 -j ACCEPT # XMPP -A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 5223 -j ACCEPT -m comment --comment "xmpps" -A OUTPUT -p udp -m udp --sport 32768:65535 --dport 1900 -j ACCEPT -m comment --comment "xmpp?" # Multicast DNS -A OUTPUT -p udp -m udp --sport 5353 --dport 5353 -j clutter -A OUTPUT -d 244.0.0.1 -j clutter -m comment --comment "Multicast DNS" -A INPUT -d 224.0.0.1 -j clutter -m comment --comment "Multicast DNS" # IRC -A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 6667 -j ACCEPT -A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 6697 -j ACCEPT -m comment --comment "ircs" # Privoxy -A OUTPUT -p tcp -m tcp --dport 8118 -j ACCEPT -m comment --comment "Privoxy" # Bitcoin -A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 8333 -j ACCEPT -m comment --comment "Bitcoin" # MagnaVersum Gogs git SSH -A OUTPUT -d 138.201.205.221 -p tcp -m tcp --sport 32768:65535 --dport 10022 -j ACCEPT -m comment --comment "MagnaVersum Gogs git SSH" # OpenPGP HTTP Key servers -A OUTPUT -p tcp -m tcp --sport 32768:65535 --dport 11371 -j ACCEPT -m comment --comment "OpenPGP HTTP key servers" # Torrents -A OUTPUT -p udp -m udp --sport 51413 -j ACCEPT -m comment --comment "Torrents" -A OUTPUT -p tcp -m tcp --dport 51413 -j ACCEPT -m comment --comment "Torrents" -A OUTPUT -p tcp -m tcp --sport 51413 --dport 1024:65535 -j ACCEPT -m comment --comment "Torrents" -A INPUT -p udp -m udp --dport 51413 -j ACCEPT -m comment --comment "Torrents" -A INPUT -p tcp -m tcp --dport 51413 -j ACCEPT -m comment --comment "Torrents" # Traceroute -A OUTPUT -p udp -m udp --sport 32768:65535 --dport 6881:33534 -j ACCEPT -m comment --comment "Traceroute" # CloudFlare. Why see http://www.crimeflare.com/cfblock.html #-A INPUT -s 103.21.244.0/22,103.22.200.0/22,103.31.4.0/22,104.16.0.0/12,108.162.192.0/18,131.0.72.0/22,141.101.64.0/18,162.158.0.0/15,172.64.0.0/13,173.245.48.0/20,188.114.96.0/20,190.93.240.0/20,197.234.240.0/22,198.41.128.0/17,199.27.128.0/21 -m limit --limit 5/min -j LOG --log-prefix "iptables dropped: " --log-level 7 #-A INPUT -s 103.21.244.0/22,103.22.200.0/22,103.31.4.0/22,104.16.0.0/12,108.162.192.0/18,131.0.72.0/22,141.101.64.0/18,162.158.0.0/15,172.64.0.0/13,173.245.48.0/20,188.114.96.0/20,190.93.240.0/20,197.234.240.0/22,198.41.128.0/17,199.27.128.0/21 -j DROP -m comment --comment "CloudFlare http://www.crimeflare.com/cfblock.html" #-A OUTPUT -d 103.21.244.0/22,103.22.200.0/22,103.31.4.0/22,104.16.0.0/12,108.162.192.0/18,131.0.72.0/22,141.101.64.0/18,162.158.0.0/15,172.64.0.0/13,173.245.48.0/20,188.114.96.0/20,190.93.240.0/20,197.234.240.0/22,198.41.128.0/17,199.27.128.0/21 -m limit --limit 5/min -j LOG --log-prefix "iptables dropped: " --log-level 7 #-A OUTPUT -d 103.21.244.0/22,103.22.200.0/22,103.31.4.0/22,104.16.0.0/12,108.162.192.0/18,131.0.72.0/22,141.101.64.0/18,162.158.0.0/15,172.64.0.0/13,173.245.48.0/20,188.114.96.0/20,190.93.240.0/20,197.234.240.0/22,198.41.128.0/17,199.27.128.0/21 -j REJECT -m comment --comment "CloudFlare http://www.crimeflare.com/cfblock.html" # Attacks, crawls, scans, etc to clutter chain -A INPUT -p icmp -j clutter -A INPUT -s 0.0.0.0 -d 255.255.255.255 -j clutter -m comment --comment "Broadcast messages" -A INPUT -p udp -m udp --dport 19 -j clutter -m comment --comment "Character generator, looping to echo = DDoS" -A INPUT -p tcp -m tcp --dport 23 -j clutter -A INPUT -p udp -m udp --dport 53 -j clutter -A INPUT -p udp -m udp --dport 111 -j clutter -m comment --comment "Probe/fingerprint Nix OS" -A INPUT -p tcp -m tcp --dport 445 -j clutter -m comment --comment "MS-DS active directory" -A INPUT -p tcp -m tcp --dport 2323 -j clutter -m comment --comment "3d-nfsd" -A INPUT -p udp -m udp --dport 5060 -j clutter -A INPUT -p tcp -m tcp --dport 3389 -j clutter -m comment --comment "MS terminal server RDP" #-A INPUT -d 255.255.255.255 -p tcp -m tcp --sport 67 --dport 68 -j clutter -m comment --comment "DHCP" #-A INPUT -m iprange --dst-range 185.66.250.254-185.66.250.255 -j clutter #-A INPUT -m mac --mac-source d4:ca:6d:74:87:0d -j clutter #-A INPUT -p udp -m udp --dport 3076 -j clutter -m comment --comment "orbix-config" # Log & drop -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables dropped: " --log-level 7 -A INPUT -j DROP -A FORWARD -m limit --limit 5/min -j LOG --log-prefix "iptables dropped: " --log-level 7 -A FORWARD -j DROP -A OUTPUT -m limit --limit 5/min -j LOG --log-prefix "iptables rejected: " --log-level 7 -A OUTPUT -j REJECT --reject-with icmp-port-unreachable -A clutter -m limit --limit 5/min -j LOG --log-prefix "iptables clutter dropped: " --log-level 7 -A clutter -j DROP COMMIT