Because you are looking for a "portable" solution, the methods below do not require administrative privileges or permanent installation on the host computer. You can run these applications directly from a USB flash drive. 1. Portable Tor Browser
Some dedicated privacy tools offer "zero-install" executables.
A VPN is the most secure method to bypass network blocks. It encrypts your internet traffic and routes it through a server in a different location, hiding your browsing activity from the network administrator. unblock thumbzilla portable
Utilizing shady unblocking mirrors or downloading "portable" tools exposes your hardware to malicious scripts.
No browsing history is saved on the computer you are using. Because you are looking for a "portable" solution,
A Virtual Private Network can change your apparent location, but only use it where allowed. Many workplaces and schools prohibit VPNs, and some countries restrict them entirely.
Simple web-based proxies act as a middleman. You enter the URL into the proxy site, and it fetches the content for you. This is effective for light blocking but can be slower and less secure than a VPN. Alternative DNS: Portable Tor Browser Some dedicated privacy tools offer
To regain access, you need to hide your traffic or change how your device talks to the internet.