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Test which TCP ports are blocked by my ISP
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| #!/bin/bash | |
| for port in {1..9999}; do | |
| echo -n "TCP $port: " | |
| result=$(nc "$1" "$port" -w 1 2>&1 < /dev/null) | |
| if [ "$?" -eq 0 ]; then | |
| echo "Open" | |
| continue | |
| fi | |
| if [[ "$result" == *refused* ]]; then | |
| echo "Closed" | |
| fi | |
| if [[ "$result" == *time* ]]; then | |
| echo "$port" >> block_list.txt | |
| echo "BLOCKED" | |
| fi | |
| done |
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