IP Blocklists for WordPress: Automatic Protection Guide

IP blocklists are curated lists of addresses known to be associated with malicious activity. Blocking these IPs preemptively stops attacks before they start.

Types of IP Blocklists

Spam Blocklists

• Spamhaus DROP: "Don't Route Or Peer" - worst offenders
• Spamhaus EDROP: Extended DROP list
• Spamcop: Real-time spam sources

Threat Blocklists

• FireHOL Level 1: Aggregated high-confidence threats
• Emerging Threats: Malware and botnet IPs
• Blocklist.de: Brute force attackers

Regional/Special Lists

• Tor exit nodes
• Known VPN/proxy services
• Data center IP ranges

How IP Blocklists Work

Basic Operation

1. Visitor connects to your site
2. Their IP address captured
3. IP checked against blocklist
4. If found: Block access
5. If not found: Allow access

Blocklist Formats

• Single IPs: 192.168.1.1
• CIDR ranges: 192.168.0.0/16
• IP ranges: 192.168.1.1-192.168.1.255

Benefits of Blocklist Protection

Proactive Blocking

Block known bad actors before they do anything.

Reduced Load

Blocking at the IP level saves resources—no need to process requests.

Zero False Positives on Known Bad IPs

If an IP is on Spamhaus DROP, it's definitely bad.

Automatic Updates

Lists update regularly with new threats.

Implementing Blocklists

Method 1: WP Folder Shield (Recommended)

Automatic blocklist integration:

1. Enable Threat Intelligence in settings
2. Blocklists downloaded automatically
3. Updated every 6 hours
4. O(1) instant IP lookup

Method 2: Server-Level (Advanced)

Using iptables or firewall rules:

iptables -A INPUT -s 192.168.1.1 -j DROP

Challenges:

• Manual updates required
• Can become unwieldy with large lists
• Requires server access

Method 3: Cloudflare

If using Cloudflare:

• Some blocklists built-in
• Can upload custom IP lists
• Blocks before reaching your server

WP Folder Shield Blocklist Features

Aggregated Sources

We combine multiple blocklists:

• Spamhaus DROP/EDROP
• FireHOL Level 1
• Emerging Threats
• Blocklist.de
• Crowdsourced from our network

Confidence Scoring

Not all blocklist entries are equal:

• High confidence: On multiple lists, recent reports
• Medium confidence: Single source, verified
• Lower confidence: Older entries, single report

Configurable Threshold

You control the blocking threshold:

• Block all listed IPs (aggressive)
• Block high confidence only (moderate)
• Block very high confidence only (conservative)

Best Practices

1. Use Multiple Sources

No single blocklist catches everything. Combine several for comprehensive protection.

2. Keep Lists Updated

Blocklists change constantly. Stale data misses new threats.

3. Monitor for Issues

Occasionally, legitimate IPs end up on blocklists. Have a way to whitelist if needed.

4. Combine with Other Security

Blocklists are one layer. Add firewall, 2FA, and malware scanning too.

Get WP Folder Shield for automatic IP blocklist protection from multiple trusted sources.