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Examples

Skip action

The example below blocks all tcp ports, but allows one port (8080) by using the skip action.

curl -X POST https://api.cloudflare.com/client/v4/accounts/${account_id}/rulesets \
-H 'Content-Type: application/json' \
-H 'X-Auth-Email: user@example.com' \
-H 'X-Auth-Key: 00000000000' \
--data '{
"name": "Example ruleset",
"kind": "root",
"phase": "magic_transit",
"description": "Example ruleset description",
"rules": [
{
"action": "skip",
"action_parameters": { "ruleset": "current" },
"expression": "tcp.dstport in { 8080 } ",
"description": "Allow port 8080"
},
{
"action": "block",
"expression": "tcp.dstport in { 1..65535 }",
"description": "Block all tcp ports"
}
]
}'

Block a country

The example below allows all packets with a source or destion IP coming from Brazil by using its 2-letter country code in ISO 3166-1 Alpha 2 format.

curl -X POST https://api.cloudflare.com/client/v4/accounts/${account_id}/rulesets \
-H 'Content-Type: application/json' \
-H 'X-Auth-Email: user@example.com' \
-H 'X-Auth-Key: 00000000000' \
--data '{
"name": "Example ruleset",
"kind": "root",
"phase": "magic_transit",
"description": "Example ruleset description",
"rules": [
{
"action": "block",
"expression": "ip.geoip.country == \"BR\"",
"description": "Block traffic from Brazil"
}
]
}'

Use an IP List

Magic Firewall supports using lists in expressions for the ip.src and ip.dst fields. The supported lists are:

  • $cf.anonymizer - Anonymizer proxies
  • $cf.botnetcc - Botnet command and control channel
  • $cf.malware - Sources of malware
curl -X POST https://api.cloudflare.com/client/v4/accounts/${account_id}/rulesets \
-H 'Content-Type: application/json' \
-H 'X-Auth-Email: user@example.com' \
-H 'X-Auth-Key: 00000000000' \
--data '{
"name": "Example ruleset",
"kind": "root",
"phase": "magic_transit",
"description": "Example ruleset description",
"rules": [
{
"action": "block",
"expression": "ip.src in $cf.anonymizer",
"description": "Block traffic from an anonymizer proxy"
}
]
}'