Network address
IP Blocking
Blocking all traffic to specific IP addresses regardless of protocol.
Read the definitionThe definition and detection notes below retain the published reference wording. They are not a current network test.
01 / Definition
What it means.
IP blocking prevents any network traffic from reaching specific IP addresses. This is a blunt instrument that affects all services hosted on the blocked IP, including unrelated websites sharing the same infrastructure.
IP blocking causes significant collateral damage when applied to cloud providers or CDNs where thousands of sites share IP addresses. It's most commonly used against VPN endpoints, Tor nodes, and dedicated infrastructure.
02 / How We Detect This
What we look for.
We test TCP connectivity to IP addresses and compare results across vantage points. Complete connection failures or timeouts to IPs that are reachable from control locations indicate IP-level blocking. We distinguish this from server issues by testing multiple ports and protocols.
03 / Examples
What it can look like.
All connections to Telegram IP ranges fail
VPN server IPs unreachable from specific country
CDN IP blocked, affecting thousands of sites
Illustrative examples from the glossary, not incident reports or live observations.
Sources
Read the original.
Reference context & original shorthand
Published bypass label: Hard to bypass.
This is the original index’s editorial shorthand. Actual access depends on the network and technique; this label is not a guarantee. The glossary has no per-entry publication or review date.
Related links lead to definitions in the published glossary.
Complete definition →