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Fix issue caused by different iptables versions #72

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Jul 19, 2021
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Fix issue caused by different iptables versions #72

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10 changes: 10 additions & 0 deletions manager.go
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Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,16 @@ func detectHairpinMode() (bool, error) {
return false, nil
}

// Old iptables misinterprets prefix matches in new iptables
hairpinModeOffRulespec[2] = "127.0.0.0/32"

hairpinModeOff, err = ipt.Exists(TableNat, ChainOutput, hairpinModeOffRulespec...)
if err != nil {
return false, err
} else if hairpinModeOff {
return false, nil
}

return false, errors.New("unable to detect hairpin mode (is the docker daemon running?)")
}

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