The TCP & UDP Protocols have not changed, which requires an industry-wide amendment to them. What is far more likely (unless you use DDNS) is that your WAN IP address on the router has changed.
Which make/model of router are you using?
From the 29th of March our TalkTalk Community will move to peer-to-peer support and the TalkTalk team will no longer be here to support with queries. Don’t worry we still have plenty of ways to reach out if you need to speak to TalkTalk directly. For more details check out the link here
How to contact TalkTalk Broadband - TalkTalk Help & Support
