Glossary · Circumvention

PTA (Pakistan Telecommunication Authority)

Also calledpakistan censorshippta blocklist

Definition

The Pakistan Telecommunication Authority regulates internet access in Pakistan and directs the national blocklist enforced through ISP-level DNS and DPI.

Explanation

In depth

PTA has ordered nationwide blocks of YouTube, TikTok, Wikipedia, and X at various points, sometimes for extended periods. The technical enforcement is centralised through the Internet Monitoring System (IMS) which uses DNS filtering and increasingly DPI. PTA has also warned that unregistered VPNs may be restricted, though the tools themselves remain lawful to use. Web proxies over HTTPS to mainstream domains are less commonly targeted than protocol-fingerprinted VPNs.

See alsoUnblock sites from Pakistan

Related terms

GFW (Great Firewall of China)The Great Firewall is China's national-level internet filter — one of the most technically sophisticated censorship systems in operation.RoskomnadzorRoskomnadzor is Russia's federal executive agency responsible for media and telecom oversight — including the national blocklist enforced by Russian ISPs.KominfoKominfo is Indonesia's Ministry of Communication and Information Technology — issues nationwide block lists ISPs enforce via DNS filtering.DNS filteringDNS filtering blocks websites by making the DNS resolver return a fake response — the cheapest and most common first-line censorship tool.

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