HyperDHT can not punch through firewall when both server and client are on the same network.

[supersuryaansh]

Issue : HyperDHT can not punch through firewall when both the client and server are on the same network and the host is a Linux machine using ufw/gufw firewall.

I have tested this with Linux Mint but this also occurs on Ubuntu and other Linux based OSes.

Reproduction Steps:

1. Start a HyperDHT server on Linux Mint or Ubuntu
2. Make sure in firewall settings, Incoming is set to "Deny"
3. Now try starting a HyperDHT client and it will not punch through, but if you set the button to "Allow" the connection will go through.