A bash script for checking the accessibility of websites potentially affected by Deep Packet Inspection (DPI) blocking or geographic restrictions.
Warning
Some websites may not return expected status codes due to various security measures
- Sites like chatgpt.com, claude.ai consistently return
403status due to JavaScript verification checks, even when accessed from unrestricted locations - Sites like intel.com may return
200status but still display blocking notifications in the actual content - Results should be verified manually when behavior seems inconsistent with your actual location
- Tests both HTTP and HTTPS protocols for each domain
- Detects different access scenarios: available, blocked, redirected, or access denied
- Includes predefined lists of commonly DPI-blocked and geo-restricted websites
- Supports custom domain lists via file input
- Configurable connection timeout and retry parameters
- Color-coded output for easy readability
The script contains predefined lists of websites commonly affected by:
- DPI Blocking: Includes social media, video platforms, and other commonly restricted services
- Geographic Restrictions: Popular streaming services and platforms that implement geo-blocking
- bash
- curl
- nslookup
- netcat
For local usage, download the script:
wget https://github.com/vernette/censorcheck/raw/master/censorcheck.sh
chmod +x censorcheck.sh# Show help message
./censorcheck.sh --help
# Check DPI-blocked sites
./censorcheck.sh --mode dpi
# Check DPI-blocked sites using IPv6
./censorcheck.sh --mode dpi --ipv6
# Check custom domain list with increased timeout and retries
./censorcheck.sh --file sites.txt --timeout 10 --retries 3
# Check if a specific site is accessible through a proxy
./censorcheck.sh --domain example.com --proxy 127.0.0.1:1080
# Check only HTTP protocol for a specific domain
./censorcheck.sh --domain example.com --http-only
# Check only HTTPS protocol for all DPI-blocked sites
./censorcheck.sh --mode dpi --https-onlyYou could run the script directly from GitHub:
bash <(wget -qO- https://github.com/vernette/censorcheck/raw/master/censorcheck.sh) --mode dpiAll options available in the help message (-h, --help) can be used and combined.
Usage: censorcheck.sh [OPTIONS]
Checks accessibility of websites that might be blocked by DPI or geolocation restrictions
Options:
-h, --help Display this help message and exit
-m, --mode Set checking mode: 'dpi', 'geoblock', or 'both' (default: both)
-t, --timeout Set connection timeout in seconds (default: 5)
-r, --retries Set number of connection retries (default: 2)
-u, --user-agent Set custom User-Agent string (default: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0)
-f, --file Read domains from specified file instead of using built-in lists
-6, --ipv6 Use IPv6 (default: IPv4)
-p, --proxy Use SOCKS5 proxy (format: host:port)
-d, --domain Specify a single domain to check
--http-only Check only HTTP protocol
--https-only Check only HTTPS protocol
-j, --json Output results in JSON format
Examples:
censorcheck.sh # Check all predefined domains with default settings
censorcheck.sh --mode dpi # Check only DPI-blocked sites
censorcheck.sh --timeout 10 --retries 3 # Use longer timeout and more retries
censorcheck.sh --user-agent "MyAgent/1.0" # Use custom User-Agent
censorcheck.sh --file my-domains.txt # Check domains from custom file
censorcheck.sh --ipv6 # Use IPv6 instead of IPv4
censorcheck.sh --proxy 127.0.0.1:1080 # Check domains using SOCKS5 proxy
censorcheck.sh --domain example.com # Check a single domain
censorcheck.sh --file my-domains.txt --json # Check custom domains and output JSON
The domain file should contain one domain per line. Lines starting with # are ignored
You can check your own list of domains by creating a text file with one domain per line:
# My custom domains to check
example.com
test-site.net
# Commented lines are ignored
another-domain.org
# Empty lines are also ignored
Then run the script with:
./censorcheck.sh --file my-domains.txtThe script provides color-coded results for each domain:
- Green: Site is available (HTTP 200)
- Red: Site is blocked, unreachable, or access denied (HTTP 403)
- Blue: Site redirects to another URL
- Orange: Other HTTP status codes
Contributions are welcome! Feel free to submit pull requests to add new domains to the predefined lists or improve the script's functionality.
- DNS spoofing detection by ISP or hosting provider
- Results table
- JSON output
- Debug mode