Astrina bot & checker IPs
If you found this page in your server logs: an Astrina user asked us to check this site. Astrina runs uptime monitors, secret-shopper scenarios (scripted form walk-throughs), SEO crawls and one-off page checks on behalf of site owners and our users.
All scheduled checks and crawls leave from this address:
37.59.138.174
User agents: AstrinaBot/1.0 (+https://astrina.io/bot) · AstrinaMonitor/1.0 (+https://astrina.io/bot)
Independent Pulsar-network probes (opt-in device checks) come from their own residential addresses and always carry the Astrina user agent.
If this is your site, the checks are almost certainly your own monitoring: uptime, form scenarios, SEO audits. A firewall, rate limiter or anti-bot layer (Cloudflare, fail2ban, ModSecurity) that bans this IP silently breaks that monitoring — the checks report your forms as broken or your site as down, when what is down is only our access to it.
- Cloudflare: Security → WAF → Tools → IP Access Rules → Allow for the IP above.
- fail2ban: add the IP to ignoreip in your jail configuration.
- nginx / Apache: exclude the IP from rate-limit and deny rules.
Scheduled checks exist only for sites configured by their owners in Astrina; one-off checks are started manually by our users. If you believe this site is being checked against your wishes, block the IP above — or write to us and we will stop the checks for your domain. Contact us →
What this page answers
- IP addresses of the Astrina bot
- how to allowlist a checker bot
- website checker user agent
- who is crawling my site
- uptime checker IP addresses
- allowlist a monitoring bot
- verify a crawler by IP
- monitoring bot user agent string
- why a bot visits my site
- block or allow a checker
- crawler IP ranges
- is this bot legitimate
