Monitoring IPs

VitalSentinel uses the following IP addresses for Uptime Monitoring and Custom Pod Synthetic Monitoring tests. If your site is behind a firewall or uses IP-based access controls, you'll need to allowlist these addresses.

Current IP Addresses

194.163.166.126
157.173.116.60

Last updated: July 14, 2026

Uptime Bot User Agent

Uptime checks are sent with the following User-Agent string, which you can also match in firewall or WAF rules:

VitalSentinel Uptime Bot/1.0 (+https://www.vitalsentinel.com/uptime-bot)

When to Allowlist

You may need to allowlist these IPs if:

• Your site is behind a firewall that blocks unknown traffic
• You use a web application firewall (WAF) with strict rules
• Your hosting provider restricts access by IP
• You have rate limiting that might block monitoring requests

How to Allowlist

The process varies depending on your infrastructure:

Cloudflare

1. Go to Security → WAF → Tools
2. Add an IP Access Rule
3. Set Action to Allow for each IP

AWS Security Groups

1. Go to EC2 → Security Groups
2. Edit inbound rules
3. Add HTTP/HTTPS rules for each IP

Nginx

Add to your server configuration:

allow 194.163.166.126;
allow 157.173.116.60;

Apache

Add to your .htaccess or virtual host configuration:

Require ip 194.163.166.126
Require ip 157.173.116.60

Verification

After allowlisting, verify VitalSentinel can reach your site:

1. Go to your domain's Uptime Monitoring section
2. Check that uptime checks are succeeding
3. Run a Synthetic Monitoring test and verify it completes
4. If still failing, verify the IPs are correctly allowlisted

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