improve compatibility of default arguments

The 240.0.0.0/24 subnet does not seem to work well on Windows

cmd/tun2socks/main.go

@@ -55,8 +55,8 @@ type CmdArgs struct {
 	DnsFallback     *bool
 	LogLevel        *string
 	EnableFakeDns   *bool
-	FakeDnsMinIP *string
-	FakeDnsMaxIP *string
+	FakeDnsMinIP    *string
+	FakeDnsMaxIP    *string
 }
 
 type cmdFlag uint
@@ -108,10 +108,10 @@ const (
 func main() {
 	args.Version = flag.Bool("version", false, "Print version")
 	args.TunName = flag.String("tunName", "tun1", "TUN interface name")
-	args.TunAddr = flag.String("tunAddr", "240.0.0.2", "TUN interface address")
-	args.TunGw = flag.String("tunGw", "240.0.0.1", "TUN interface gateway")
+	args.TunAddr = flag.String("tunAddr", "10.255.0.2", "TUN interface address")
+	args.TunGw = flag.String("tunGw", "10.255.0.1", "TUN interface gateway")
 	args.TunMask = flag.String("tunMask", "255.255.255.0", "TUN interface netmask, as for IPv6, it's the prefixlen")
-	args.TunDns = flag.String("tunDns", "114.114.114.114,223.5.5.5", "DNS resolvers for TUN interface (only need on Windows)")
+	args.TunDns = flag.String("tunDns", "8.8.8.8,8.8.4.4", "DNS resolvers for TUN interface (only need on Windows)")
 	args.ProxyType = flag.String("proxyType", "socks", "Proxy handler type, e.g. socks, shadowsocks, v2ray")
 	args.DelayICMP = flag.Int("delayICMP", 10, "Delay ICMP packets for a short period of time, in milliseconds")
 	args.LogLevel = flag.String("loglevel", "info", "Logging level. (debug, info, warn, error, none)")