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added iptables check cmd

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This commit is contained in:
0xdcarns 2022-03-28 10:00:35 -04:00
parent 57f438247a
commit d74106c071
1 changed files with 11 additions and 8 deletions
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19
serverctl/iptables.go
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@ -110,16 +110,19 @@ func iptablesPortForward(entry string, inport string, outport string, isIP bool)
return errors.New("could not locate ip for " + entry)
}
_, err := ncutils.RunCmd("iptables -t nat -A PREROUTING -p tcp --dport "+inport+" -j DNAT --to-destination "+address+":"+outport, false)
if err != nil {
if output, _ := ncutils.RunCmd("iptables -t nat -C PREROUTING -p tcp --dport "+inport+" -j DNAT --to-destination "+address+":"+outport, false); output == "" {
_, err := ncutils.RunCmd("iptables -t nat -A PREROUTING -p tcp --dport "+inport+" -j DNAT --to-destination "+address+":"+outport, false)
if err != nil {
return err
}
_, err = ncutils.RunCmd("iptables -t nat -A PREROUTING -p udp --dport "+inport+" -j DNAT --to-destination "+address+":"+outport, false)
if err != nil {
return err
}
_, err = ncutils.RunCmd("iptables -t nat -A POSTROUTING -j MASQUERADE", false)
return err
}
_, err = ncutils.RunCmd("iptables -t nat -A PREROUTING -p udp --dport "+inport+" -j DNAT --to-destination "+address+":"+outport, false)
if err != nil {
return err
}
_, err = ncutils.RunCmd("iptables -t nat -A POSTROUTING -j MASQUERADE", false)
return err
return nil
}
// if running in host networking mode, run iptables to map to CoreDNS container