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Allow container SSH through iptables DOCKER-USER chain #100

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Allow container SSH through iptables DOCKER-USER chain #100

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47980a1
fix(shadeform): allow container SSH through iptables DOCKER-USER chain
arush070 Mar 9, 2026
7e780b9
fix(shadeform): update comment to clarify dport 22 scope
arush070 Mar 11, 2026
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4 changes: 4 additions & 0 deletions v1/providers/shadeform/firewall.go
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,9 @@ const (
// Allow inbound traffic on the loopback interface.
ipTablesAllowDockerUserInpboundLoopback = "iptables -A DOCKER-USER -i lo -j ACCEPT"

// Allow external inbound TCP traffic to any container port 22 (SSH)
ipTablesAllowDockerUserContainerSSH = "iptables -A DOCKER-USER -p tcp --dport 22 -j ACCEPT"

// Drop everything else.
ipTablesDropDockerUserInbound = "iptables -A DOCKER-USER -j DROP"
ipTablesReturnDockerUser = "iptables -A DOCKER-USER -j RETURN"
Expand Down Expand Up @@ -91,6 +94,7 @@ func (c *ShadeformClient) getIPTablesCommands() []string {
ipTablesAllowDockerUserDockerToDocker2,
ipTablesAllowDockerUserDockerToDocker3,
ipTablesAllowDockerUserInpboundLoopback,
ipTablesAllowDockerUserContainerSSH,
ipTablesDropDockerUserInbound,
ipTablesReturnDockerUser, // Expected by Docker
}
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