network

Documentation

Index

• func AllowPort(port int, proto string) error
• func DisableResolvedStub() error
• func FreePort(port int, proto string) error
• func HostFirewallActive() bool
• func RemovePort(port int, proto string) error

Functions

func AllowPort

func AllowPort(port int, proto string) error

AllowPort opens a port using the first available firewall tool.

func DisableResolvedStub

func DisableResolvedStub() error

DisableResolvedStub disables systemd-resolved's DNS stub listener on port 53 so that slipgate's DNS router can bind to it.

func FreePort

func FreePort(port int, proto string) error

FreePort kills any process listening on the given port/protocol. Uses fuser if available, falls back to lsof + kill.

func HostFirewallActive

func HostFirewallActive() bool

HostFirewallActive reports whether the host is actually filtering inbound traffic. Used to decide whether to hint about external/cloud firewalls — merely having an iptables binary installed (e.g., pulled in by Docker or fail2ban) does not count if the INPUT chain still defaults to ACCEPT.

func RemovePort

func RemovePort(port int, proto string) error

RemovePort removes a firewall rule for a port.