# Troubleshooting

## Learn how to troubleshoot potential Uptime Monitoring problems.

## [Verify Firewall Configuration](#verify-firewall-configuration)

Some hosting platforms can block incoming requests from Sentry's Uptime Bot, falsely triggering uptime alerts. We recommend verifying your firewall configuration to ensure incoming requests from Sentry are allowed.

If you need to configure your firewall allowlist to include Sentry's Uptime Bot, we recommend checking against our `User-Agent`, given that our IP addresses can change without notice.

### [User Agent](#user-agent)

Our uptime check requests use the following `User-Agent`:

```bash
SentryUptimeBot/1.0 (+http://docs.sentry.io/product/uptime-monitoring/)
```

### [IP Addresses](#ip-addresses)

See [IP Ranges](/security-legal-pii/security/ip-ranges/#uptime-monitoring) for a complete list of IP addresses used for uptime checks.

## [Verify That Issue Alerts Match Downtime Issues](#verify-that-issue-alerts-match-downtime-issues)

Uptime alerts create downtime issues. If you're not receiving notifications when downtimes are detected, make sure you've properly [configured an issue alert](/product/alerts/create-alerts/issue-alert-config/) with the issue category "uptime".
