Created
April 4, 2016 18:32
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Generic ruleset to block SSH and ARD from unknown IPs
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| # Allow trusted addresses to get to SSH and Apple remote desktop. | |
| # Ports filtered - add more ports to allow more services as needed | |
| # 22/tcp: ssh | |
| # 3283/tcp: Apple Remote Desktop | |
| # 3283/udp: Apple Remote Desktop | |
| # 5900/tcp: Apple Remote Desktop/VNC | |
| incoming_services_tcp = "{ 22, 3283, 5900 }" | |
| incoming_services_udp = "{ 3283 }" | |
| # Networks allowed for access - change to your org's IP ranges using slash notation or individual IP addresses | |
| allowed_networks = "{ 1.2.0.0/16, 2.3.4.0/24 }" | |
| # localhost allow | |
| set skip on lo0 | |
| # Normalization | |
| scrub in all no-df | |
| # Allow incoming ports for whitelisted org's networks | |
| pass in quick proto tcp from $allowed_networks to any port $incoming_services_tcp | |
| pass in quick proto udp from $allowed_networks to any port $incoming_services_udp | |
| # Block from other networks | |
| block drop in quick proto tcp from any to any port $incoming_services_tcp | |
| block drop in quick proto udp from any to any port $incoming_services_udp |
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