Google Chrome is now blocking access to TCP port 10080 to prevent the ports from being abused in NAT Slipstreaming 2.0 attacks. The vulnerability allows scripts on malicious websites to bypass visitors’ NAT firewall and gain access to any TCP/UDP port on the visitor’s internal network. Chrome has already blocked the vulnerable port since November 2020. Chrome is blocking ports 69, 137, 161, 554, 1719, 1720, 1723, 5060, 5061, and 6566.
Source: https://www.bleepingcomputer.com/news/security/google-chrome-blocks-port-10080-to-stop-nat-slipstreaming-attacks/