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all: do not listen on 0.0.0.0 on desktop clients

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Since this may create security vulnerabilities such as DNS amplification
or abusing because the listener was exposed to the entire local network.
This commit is contained in:
Cuong Manh Le
2025-05-15 16:59:24 +07:00
committed by Cuong Manh Le
parent ace3b1e66e
commit 00e9d2bdd3
5 changed files with 34 additions and 4 deletions
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cmd/cli/dns_proxy.go
+3 -1
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@@ -1042,8 +1042,10 @@ func (p *prog) queryFromSelf(ip string) bool {
return false
}
// needRFC1918Listeners reports whether ctrld need to spawn listener for RFC 1918 addresses.
// This is helpful for non-desktop platforms to receive queries from LAN clients.
func needRFC1918Listeners(lc *ctrld.ListenerConfig) bool {
return lc.IP == "127.0.0.1" && lc.Port == 53
return lc.IP == "127.0.0.1" && lc.Port == 53 && !ctrld.IsDesktopPlatform()
}
// ipFromARPA parses a FQDN arpa domain and return the IP address if valid.