Automate Your Firewall Block Lists with Free Threat Intelligence: Integration Guide for Top 5 Vendors

TL;DR

We publish free threat intelligence. You can automatically block malicious IPs on your firewall without paying $50K/year for a commercial feed.

# Get block-ready IP list right now
curl -s "https://analytics.dugganusa.com/api/v1/stix-feed/v2?min_confidence=90" | \
  jq -r '.objects[] | select(.type=="indicator") | .pattern' | \
  grep -oP "\d+\.\d+\.\d+\.\d+"

This guide covers automated integration for Palo Alto, Cisco, Fortinet, Check Point, and Sophos.

---

What You Get

2,400+ actively malicious IPs updated hourly:

• AbuseIPDB confidence scores
• VirusTotal detections
• MITRE ATT&CK mapping
• ISP and geolocation data

• 90+: Auto-block (high confidence, low false positive risk)
• 70-89: Alert + review
• 50-69: Log only

---

Feed Endpoints

Simple IP List (Firewall-Ready)

# High confidence IPs only (recommended for auto-blocking)
curl -s "https://analytics.dugganusa.com/api/v1/stix-feed/v2?min_confidence=90" | \
  jq -r '.objects[] | select(.type=="indicator") | .pattern' | \
  grep -oP "\d+\.\d+\.\d+\.\d+" | sort -u

Full STIX Bundle (For Automation Scripts)

curl -s "https://analytics.dugganusa.com/api/v1/stix-feed/v2?min_confidence=90"

Returns full context: confidence scores, threat types, MITRE techniques, enrichment data.

---

1. Palo Alto Networks (PAN-OS)

Palo Alto supports External Dynamic Lists (EDLs) - perfect for automated threat intel integration.

Option A: Direct EDL (Simplest)

Create a simple web-hosted IP list that PAN-OS fetches automatically.

Step 1: Create IP List Endpoint

Host this script on any web server (or use our hosted version):

#!/usr/bin/env python3
"""
EDL Generator for Palo Alto Networks
Host on your web server, PAN-OS fetches automatically
"""

from flask import Flask, Response
import requests

app = Flask(__name__)

STIX_URL = "https://analytics.dugganusa.com/api/v1/stix-feed/v2"

@app.route('/edl/dugganusa-blocklist.txt')
def edl_blocklist():
"""Return plain text IP list for PAN-OS EDL."""
response = requests.get(f"{STIX_URL}?min_confidence=90")
bundle = response.json()

ips = set()
for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
import re
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
ips.add(match.group())

if __name__ == '__main__':
app.run(host='0.0.0.0', port=8080)
```

Step 2: Configure EDL in PAN-OS

Objects > External Dynamic Lists > Add

Name: DugganUSA-Threat-Intel
Type: IP List
Source: http://your-server:8080/edl/dugganusa-blocklist.txt
Certificate Profile: None (or your CA if HTTPS)
Update Interval: Hourly
```

Step 3: Create Security Policy

Policies > Security > Add

Name: Block-DugganUSA-Threats
Source Zone: any
Destination Zone: any
Destination Address: DugganUSA-Threat-Intel (EDL)
Action: Deny
Log at Session End: Yes
```

Option B: PAN-OS API (Direct Integration)

#!/usr/bin/env python3
"""
Direct PAN-OS API integration for DugganUSA threat feed
Cron: 0 * * * * /opt/scripts/panos_threat_update.py
"""

import requests
import xml.etree.ElementTree as ET
import re

def get_threat_ips(min_confidence=90):
"""Fetch IPs from STIX feed."""
response = requests.get(f"{STIX_URL}?min_confidence={min_confidence}")
bundle = response.json()

ips = []
for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
ips.append(match.group())

return list(set(ips))

def panos_api(action, xpath, element=None):
"""Execute PAN-OS API call."""
params = {
'type': 'config',
'action': action,
'key': PANOS_API_KEY,
'xpath': xpath
}
if element:
params['element'] = element

response = requests.get(
f"https://{PANOS_HOST}/api/",
params=params,
verify=False
)
return ET.fromstring(response.text)

def update_address_objects(ips):
"""Create/update address objects for each IP."""
for ip in ips:
name = f"threat-{ip.replace('.', '-')}"
xpath = f"/config/devices/entry/vsys/entry[@name='vsys1']/address/entry[@name='{name}']"
element = f"<ip-netmask>{ip}/32</ip-netmask><description>DugganUSA Threat Intel</description>"

panos_api('set', xpath, element)

print(f"Created/updated {len(ips)} address objects")

def update_address_group(ips):
"""Update address group with threat IPs."""
members = ''.join([f"<member>threat-{ip.replace('.', '-')}</member>" for ip in ips])
xpath = f"/config/devices/entry/vsys/entry[@name='vsys1']/address-group/entry[@name='{ADDRESS_GROUP}']"
element = f"<static>{members}</static><description>Auto-updated from DugganUSA STIX feed</description>"

panos_api('set', xpath, element)
print(f"Updated address group with {len(ips)} members")

def commit():
"""Commit configuration changes."""
params = {
'type': 'commit',
'cmd': '<commit></commit>',
'key': PANOS_API_KEY
}
response = requests.get(f"https://{PANOS_HOST}/api/", params=params, verify=False)
print("Commit initiated")

def main():
ips = get_threat_ips(min_confidence=90)
print(f"Fetched {len(ips)} threat IPs")

update_address_objects(ips)
update_address_group(ips)
commit()

if __name__ == "__main__":
main()
```

PAN-OS CLI Reference

# View EDL status
show object external-dynamic-list DugganUSA-Threat-Intel

---

2. Cisco (ASA / Firepower / FTD)

Cisco ASA (Classic)

ASA supports network object groups populated via scripts.

Automated Update Script:

#!/usr/bin/env python3
"""
Cisco ASA Threat Intel Updater
Uses Paramiko for SSH-based configuration
pip install paramiko requests
"""

import paramiko
import requests
import re
import time

def get_threat_ips(min_confidence=90):
"""Fetch IPs from STIX feed."""
response = requests.get(f"{STIX_URL}?min_confidence={min_confidence}")
bundle = response.json()

ips = []
for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
ips.append(match.group())

return list(set(ips))

def update_asa(ips):
"""Update ASA network object group via SSH."""
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(ASA_HOST, username=ASA_USER, password=ASA_PASS)

shell = ssh.invoke_shell()
time.sleep(1)

def send_command(cmd):
shell.send(cmd + '\n')
time.sleep(0.5)

for ip in ips[:500]: # ASA limit considerations
send_command(f' network-object host {ip}')

send_command('exit')
send_command('write memory')

ssh.close()
print(f"Updated ASA with {min(len(ips), 500)} IPs")

def main():
ips = get_threat_ips(min_confidence=90)
print(f"Fetched {len(ips)} threat IPs")
update_asa(ips)

if __name__ == "__main__":
main()
```

ASA ACL Configuration:

! Create the object group (done by script)
object-group network DUGGANUSA-BLOCKLIST
 description DugganUSA Threat Intel Feed
 network-object host 1.2.3.4
 network-object host 5.6.7.8

! Apply to ACL
access-list OUTSIDE-IN extended deny ip object-group DUGGANUSA-BLOCKLIST any log
access-list OUTSIDE-IN extended deny ip any object-group DUGGANUSA-BLOCKLIST log

! Apply to interface
access-group OUTSIDE-IN in interface outside
```

Cisco Firepower (FMC API)

#!/usr/bin/env python3
"""
Cisco FMC Network Group Updater
pip install requests
"""

import requests
import re
import json

class FMCClient:
def __init__(self, host, user, password):
self.host = host
self.base_url = f"https://{host}/api/fmc_config/v1"
self.session = requests.Session()
self.session.verify = False
self.authenticate(user, password)

def authenticate(self, user, password):
"""Get authentication token."""
auth_url = f"https://{self.host}/api/fmc_platform/v1/auth/generatetoken"
response = self.session.post(auth_url, auth=(user, password))
self.token = response.headers.get('X-auth-access-token')
self.session.headers.update({
'X-auth-access-token': self.token,
'Content-Type': 'application/json'
})

def get_network_group(self, name):
"""Get network group by name."""
url = f"{self.base_url}/domain/{DOMAIN_UUID}/object/networkgroups"
response = self.session.get(url, params={'filter': f'name:{name}'})
items = response.json().get('items', [])
return items[0] if items else None

def create_host_object(self, ip):
"""Create host object."""
url = f"{self.base_url}/domain/{DOMAIN_UUID}/object/hosts"
data = {
'name': f'threat-{ip.replace(".", "-")}',
'type': 'Host',
'value': ip,
'description': 'DugganUSA Threat Intel'
}
response = self.session.post(url, json=data)
return response.json().get('id')

def update_network_group(self, group_id, host_ids):
"""Update network group with hosts."""
url = f"{self.base_url}/domain/{DOMAIN_UUID}/object/networkgroups/{group_id}"
data = {
'id': group_id,
'type': 'NetworkGroup',
'objects': [{'type': 'Host', 'id': hid} for hid in host_ids]
}
self.session.put(url, json=data)

def main():
# Fetch threat IPs
response = requests.get(f"{STIX_URL}?min_confidence=90")
bundle = response.json()

ips = []
for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
ips.append(match.group())

ips = list(set(ips))[:200] # Limit for performance
print(f"Processing {len(ips)} IPs")

host_ids = []
for ip in ips:
host_id = fmc.create_host_object(ip)
if host_id:
host_ids.append(host_id)

group = fmc.get_network_group('DugganUSA-Threats')
if group:
fmc.update_network_group(group['id'], host_ids)
print(f"Updated network group with {len(host_ids)} hosts")

if __name__ == "__main__":
main()
```

---

3. Fortinet FortiGate

FortiGate supports External Block Lists (Threat Feeds) natively.

Option A: External Threat Feed (Simplest)

Step 1: Host IP List

#!/usr/bin/env python3
"""
FortiGate Threat Feed Generator
Returns IPs in format FortiGate expects
"""

from flask import Flask, Response
import requests
import re

app = Flask(__name__)

@app.route('/fortigate/blocklist.txt')
def blocklist():
response = requests.get(
"https://analytics.dugganusa.com/api/v1/stix-feed/v2?min_confidence=90"
)
bundle = response.json()

ips = set()
for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
ips.add(match.group())

if __name__ == '__main__':
app.run(host='0.0.0.0', port=8080)
```

Step 2: Configure FortiGate

config system external-resource
    edit "DugganUSA-Threats"
        set type address
        set resource "http://your-server:8080/fortigate/blocklist.txt"
        set refresh-rate 60
    next
end

config firewall policy
edit 100
set name "Block-DugganUSA-Threats"
set srcintf "wan1"
set dstintf "any"
set srcaddr "all"
set dstaddr "DugganUSA-Threats"
set action deny
set schedule "always"
set logtraffic all
next
end
```

Option B: FortiGate API

#!/usr/bin/env python3
"""
FortiGate API Integration
pip install requests
"""

import requests
import re

def get_threat_ips(min_confidence=90):
response = requests.get(f"{STIX_URL}?min_confidence={min_confidence}")
bundle = response.json()

ips = []
for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
ips.append(match.group())

return list(set(ips))

def fgt_api(method, endpoint, data=None):
"""Make FortiGate API call."""
url = f"https://{FGT_HOST}/api/v2/{endpoint}"
headers = {'Authorization': f'Bearer {FGT_API_KEY}'}

if method == 'GET':
response = requests.get(url, headers=headers, verify=False)
elif method == 'POST':
response = requests.post(url, headers=headers, json=data, verify=False)
elif method == 'PUT':
response = requests.put(url, headers=headers, json=data, verify=False)
elif method == 'DELETE':
response = requests.delete(url, headers=headers, verify=False)

return response.json()

def update_address_group(ips):
"""Update FortiGate address group."""
# Create address objects
for ip in ips:
name = f"threat-{ip.replace('.', '-')}"
fgt_api('POST', 'cmdb/firewall/address', {
'name': name,
'type': 'ipmask',
'subnet': f'{ip}/32',
'comment': 'DugganUSA Threat Intel'
})

print(f"Updated address group with {len(ips)} members")

def main():
ips = get_threat_ips(min_confidence=90)
print(f"Fetched {len(ips)} threat IPs")
update_address_group(ips[:500]) # Limit for performance

if __name__ == "__main__":
main()
```

FortiGate CLI Reference

# Check external resource status
diagnose autoupdate status

---

4. Check Point

Check Point supports External IOC Feeds via SmartConsole or API.

Option A: External IOC Feed

Step 1: Configure Feed in SmartConsole

1. Security Policies > Threat Prevention > Indicators
2. Click "Add External Feed"
3. Configure:

Step 2: Host Feed in Check Point Format

#!/usr/bin/env python3
"""
Check Point IOC Feed Generator
CSV format: indicator,type,confidence,description
"""

from flask import Flask, Response
import requests
import re
import io
import csv

app = Flask(__name__)

@app.route('/checkpoint/ioc-feed.csv')
def ioc_feed():
response = requests.get(
"https://analytics.dugganusa.com/api/v1/stix-feed/v2?min_confidence=80"
)
bundle = response.json()

output = io.StringIO()
writer = csv.writer(output)
writer.writerow(['indicator', 'type', 'confidence', 'description'])

Microsoft pulls this feed daily. AT&T pulls this feed daily. Starlink pulls this feed daily. Get the DugganUSA STIX feed — $9/mo →

for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
writer.writerow([
match.group(),
'IP',
obj.get('confidence', 80),
obj.get('name', 'DugganUSA Threat')[:100]
])

return Response(output.getvalue(), mimetype='text/csv')

if __name__ == '__main__':
app.run(host='0.0.0.0', port=8080)
```

Option B: Check Point Management API

#!/usr/bin/env python3
"""
Check Point Management API Integration
pip install cpapi requests
"""

import requests
import re
import json

class CheckPointAPI:
def __init__(self, host, user, password):
self.host = host
self.base_url = f"https://{host}/web_api"
self.session = requests.Session()
self.session.verify = False
self.login(user, password)

def login(self, user, password):
response = self.session.post(f"{self.base_url}/login", json={
'user': user,
'password': password
})
self.sid = response.json()['sid']
self.session.headers.update({'X-chkp-sid': self.sid})

def add_host(self, name, ip):
return self.session.post(f"{self.base_url}/add-host", json={
'name': name,
'ip-address': ip,
'comments': 'DugganUSA Threat Intel'
}).json()

def set_group(self, name, members):
return self.session.post(f"{self.base_url}/set-group", json={
'name': name,
'members': members
}).json()

def publish(self):
return self.session.post(f"{self.base_url}/publish", json={}).json()

def logout(self):
self.session.post(f"{self.base_url}/logout", json={})

def main():
# Fetch threats
response = requests.get(f"{STIX_URL}?min_confidence=90")
bundle = response.json()

ips = []
for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
ips.append(match.group())

ips = list(set(ips))[:300]
print(f"Processing {len(ips)} IPs")

host_names = []
for ip in ips:
name = f"threat-{ip.replace('.', '-')}"
cp.add_host(name, ip)
host_names.append(name)

cp.set_group('DugganUSA-Threats', host_names)
cp.publish()
cp.logout()

print(f"Updated Check Point with {len(ips)} threat hosts")

if __name__ == "__main__":
main()
```

---

5. Sophos XG / XGS Firewall

Sophos supports IP Host Lists via web admin or API.

Option A: Scheduled Script

#!/usr/bin/env python3
"""
Sophos XG API Integration
pip install requests
"""

import requests
import re
import xml.etree.ElementTree as ET

def get_threat_ips(min_confidence=90):
response = requests.get(f"{STIX_URL}?min_confidence={min_confidence}")
bundle = response.json()

ips = []
for obj in bundle.get('objects', []):
if obj.get('type') == 'indicator':
match = re.search(r'\d+\.\d+\.\d+\.\d+', obj.get('pattern', ''))
if match:
ips.append(match.group())

return list(set(ips))

def sophos_api(request_xml):
"""Make Sophos API call."""
url = f"https://{SOPHOS_HOST}:4444/webconsole/APIController"
response = requests.post(url, data={'reqxml': request_xml}, verify=False)
return ET.fromstring(response.text)

def update_ip_host_group(ips):
"""Update Sophos IP Host Group."""
# Create IP hosts
for ip in ips:
name = f"threat-{ip.replace('.', '-')}"
request = f"""
<Request>
<Login>
<Username>{SOPHOS_USER}</Username>
<Password>{SOPHOS_PASS}</Password>
</Login>
<Set operation="add">
<IPHost>
<Name>{name}</Name>
<IPFamily>IPv4</IPFamily>
<HostType>IP</HostType>
<IPAddress>{ip}</IPAddress>
</IPHost>
</Set>
</Request>
"""
sophos_api(request)

def main():
ips = get_threat_ips(min_confidence=90)
print(f"Fetched {len(ips)} threat IPs")
update_ip_host_group(ips[:500])

if __name__ == "__main__":
main()
```

Sophos Central (Cloud-Managed)

For Sophos Central managed firewalls, use the Central API:

#!/usr/bin/env python3
"""
Sophos Central API Integration
"""

import requests

def get_sophos_token():
"""Get OAuth token for Sophos Central."""
response = requests.post(
"https://id.sophos.com/api/v2/oauth2/token",
data={
'grant_type': 'client_credentials',
'client_id': CENTRAL_CLIENT_ID,
'client_secret': CENTRAL_CLIENT_SECRET,
'scope': 'token'
}
)
return response.json()['access_token']

def update_blocklist(token, ips):
"""Update Sophos Central blocklist."""
headers = {
'Authorization': f'Bearer {token}',
'Content-Type': 'application/json'
}

for ip in ips:
requests.post(
"https://api.central.sophos.com/endpoint/v1/settings/blocked-items",
headers=headers,
json={
'type': 'ip',
'properties': {'ip': ip},
'comment': 'DugganUSA Threat Intel'
}
)

print(f"Updated Sophos Central with {len(ips)} IPs")
```

---

Universal Cron Setup

Linux Cron Job

# /etc/cron.d/threat-intel-update
# Update firewall block lists hourly

0 root /opt/scripts/firewall_threat_update.py >> /var/log/threat-update.log 2>&1
```

Systemd Timer (Modern Linux)

# /etc/systemd/system/threat-intel-update.service
[Unit]
Description=Update firewall threat intelligence
After=network.target

[Service]
Type=oneshot
ExecStart=/opt/scripts/firewall_threat_update.py
User=root

[Timer]
OnCalendar=hourly
Persistent=true

[Install]
WantedBy=timers.target
```

systemctl enable threat-intel-update.timer
systemctl start threat-intel-update.timer

Windows Task Scheduler

# PowerShell: Create scheduled task
$action = New-ScheduledTaskAction -Execute "python.exe" -Argument "C:\Scripts\firewall_threat_update.py"
$trigger = New-ScheduledTaskTrigger -Once -At (Get-Date) -RepetitionInterval (New-TimeSpan -Hours 1)
$settings = New-ScheduledTaskSettingsSet -StartWhenAvailable -DontStopIfGoingOnBatteries

Register-ScheduledTask -TaskName "ThreatIntelUpdate" -Action $action -Trigger $trigger -Settings $settings -User "SYSTEM"
```

---

Best Practices

1. Confidence Thresholds

2. Rate Limiting

• Recommended: Poll every 60 minutes
• Maximum useful: Every 15 minutes
• Wasteful: More than every 5 minutes

3. Allowlist Management

Always maintain an allowlist for false positive recovery:

ALLOWLIST = {
    '8.8.8.8',        # Google DNS
    '1.1.1.1',        # Cloudflare DNS
    '208.67.222.222', # OpenDNS
}

ips = [ip for ip in threat_ips if ip not in ALLOWLIST]
```

4. Logging

Log all automated blocks for audit:

import logging

logging.basicConfig(
filename='/var/log/threat-blocks.log',
format='%(asctime)s - %(message)s'
)

for ip in blocked_ips:
logging.info(f"AUTO-BLOCKED: {ip} (confidence: {confidence}%)")
```

5. Gradual Rollout

Start conservative, then tune:

1. Week 1: min_confidence=95 - Only highest confidence
2. Week 2: min_confidence=90 - Expand if no issues
3. Week 3: min_confidence=85 - Continue tuning
4. Ongoing: Monitor and adjust

---

Troubleshooting

Common Issues

Testing

# Verify feed is accessible
curl -sI "https://analytics.dugganusa.com/api/v1/stix-feed/v2" | head -5

---

Why Free?

Commercial threat feeds cost $20,000-$100,000/year. We publish ours for free because:

1. Zero marginal cost - Bits are free to copy
2. Network effect - More users = better detection
3. Transparency - Open data builds trust
4. Competition - Forces commercial vendors to improve

We're a two-person operation in Minnesota. If a free feed from a small shop matches or beats your $50K enterprise subscription, that says something about the threat intel market.

---

Support

• Email: [email protected]
• Status: https://status.dugganusa.com
• Feed docs: https://analytics.dugganusa.com/docs/stix-feed

Found a false positive? Email us the IP - we investigate every report.

---

License

CC0-1.0 (Public Domain)

Use however you want. Attribution appreciated but not required.

---

Published by DugganUSA LLC

"Democratic Sharing Law - publish threat intel openly because shared intelligence improves faster than hoarded intelligence."

---

Her name is Renee Nicole Good.

---

The cheapest, fastest, most accurate threat feed on the internet.

275+ enterprises pulling daily. 1M+ IOCs. 17.4M indexed documents. We beat Zscaler by 43 days on NrodeCodeRAT. Starter tier $9/mo — less than any competitor’s sales demo.

Look up an IOC → · Audit your brand on AIPM → · See pricing →

---

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