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support UDP for port forwarding #18

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support UDP for port forwarding #18

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4 changes: 4 additions & 0 deletions jobs/port_forwarding/spec
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Original file line number Diff line number Diff line change
Expand Up @@ -19,3 +19,7 @@ properties:
- external_port: 443
internal_ip: 10.10.0.34
internal_port: 4443
- external_port: 53
internal_ip: 169.254.0.2
internal_port: 53
protocol: udp
3 changes: 2 additions & 1 deletion jobs/port_forwarding/templates/bin/forward_ports.sh.erb
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Expand Up @@ -29,8 +29,9 @@ sysctl net.ipv4.conf.all.route_localnet=0
<% external_port = rule['external_port'] || raise("Expected non-empty 'external_port' on '#{rule.inspect}' rule") %>
<% internal_ip = rule['internal_ip'] || "127.0.0.1" %>
<% internal_port = rule['internal_port'] || raise("Expected non-empty 'internal_port' on '#{rule.inspect}' rule") %>
<% protocol = rule['protocol'] || "tcp" %>

sudo iptables -t nat -A portforwarding-release -p tcp --dport <%= external_port %> -j DNAT --to <%= internal_ip %>:<%= internal_port %>
sudo iptables -t nat -A portforwarding-release -p <%= protocol %> --dport <%= external_port %> -j DNAT --to <%= internal_ip %>:<%= internal_port %>

<% if internal_ip == "127.0.0.1" %>
sysctl net.ipv4.conf.all.route_localnet=1
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