Enterramon’s Bots

What They Are, Why They Visit, and What To Do About It

If you have seen one of the user-agents below in your server logs or WAF alerts, this page explains exactly what it is, where it comes from, and how to handle it. Enterramon is a website performance and monitoring service built and operated by EnterraHost. Every check it runs comes from one of four named bots, all documented here.

None of them is a search engine crawler and none indexes content. They do not visit sites speculatively or at random. Every check is either triggered on demand by a user through the free tool at enterramon.com, or executed automatically as part of a paid EnterraMon Pro monitoring subscription. A customer who adds a domain to be monitored by Enterramon needs to verify the domain ownership via TXT DNS records, File, or Header verification.

The full user-agent string used by the monitoring poller is:

EnterraMon-Poller/1.0 (Site Status Check; +https://enterramon.com/bot)

This is the bot behind paid monitoring subscriptions. It checks whether a site is up or down, watches SSL certificates and WHOIS expiry, and feeds the results into the alerts and reports subscribers receive. It runs on a schedule from dedicated poller servers in the region assigned to the monitored site, so a site hosted in North America is checked from North America rather than from the other side of the world.

You will only see this user-agent if your site is enrolled in a paid monitoring subscription. To block it, robots.txt supports User-agent: EnterraMon-Poller. To keep monitoring working, allow the user-agent above in your WAF or firewall, and where possible the poller server IPs for your region.

The full user-agent string used by the audit bot is:

EnterraMon-Tester/1.0 (Site Audit; +https://enterramon.com/bot)

This bot runs the full site audit someone triggers through the free tool at enterramon.com. It loads the page the way a visitor would, from one of five regional test servers, and measures load performance, SSL status, server response time, and SEO signals. The check is nonrecurring and nondestructive.

It is also the user-agent used by the free tools on enterrahost.com/tools. The robots.txt tester, the sitemap validator, the broken link checker and the link visualiser all run a single-crawl audit of the address a visitor supplies, which is the same kind of request this bot already makes on enterramon.com, so they identify identically rather than inventing a second name for the same behaviour. A request from any of them means someone entered your domain into a free tool. It is one request, it is not recurring, and it does not modify anything.

If you are seeing this user-agent and are not a subscriber, it is likely that someone has run a one-off check against your domain through one of the free tools. It respects User-agent: EnterraMon-Tester in robots.txt.

The SEO tool crawler uses two user-agent strings, one for on-page audits and site crawls, one for link checks:

EnterraMon-SEO/1.0 (SEO Crawl & Audit; +https://enterramon.com/bot)
    EnterraMon-SEO/1.0 (Link Checker; +https://enterramon.com/bot)

This is the crawler behind the SEO tool, used for on-page audits, site crawls, and broken-link checks. It respects User-agent: EnterraMon-SEO in robots.txt.

The free utilities on enterramon.com and enterrahost.com/tools, ping, traceroute, DNS lookup, server check, MAC lookup, robots.txt tester and the rest, make lightweight one-off checks against the domain you give them. Each carries the family name plus a per-tool suffix, so a log line names the tool that made the request rather than only the family. For example:

EnterraMon-MiniTools/1.0 (Server Check; +https://enterramon.com/server-check/)
    EnterraMon-MiniTools/1.0 (Robots Tester; +https://enterramon.com/robots-txt-tester/)
    EnterraMon-MiniTools/1.0 (MAC Lookup; +https://enterramon.com/mac-address-lookup/)

These are infrastructure checks rather than content crawls, so they do not parse robots.txt beyond what the robots.txt tester itself does. The MAC lookup is the clearest case: it asks our own address-prefix database rather than your site, so no request from it ever reaches your server.

Tools that fetch more than a single fixed file, such as the sitemap validator and the site crawl behind the broken link checker and the link visualiser, are content crawls rather than infrastructure checks. Those identify as EnterraMon-Tester above, because that is the entry describing what they do.

Enterramon respects robots.txt. Before running any crawl that touches content, the bot fetches and parses your site’s file, and does not fetch a path the wildcard group disallows. Any of the following directives will prevent the corresponding bot from proceeding:

User-agent: EnterraMon-Poller
    Disallow: /

    User-agent: EnterraMon-Tester
    Disallow: /

    User-agent: EnterraMon-SEO
    Disallow: /

The wildcard rule is also honoured. A User-agent: * directive with Disallow: / will block the bots in the same way.

Two limits apply to the crawl tools, and they are stated here rather than left implied. Only the wildcard group is read, so a rule addressed to one named crawler is not applied by them. And matching is by path prefix, so a rule containing a wildcard character is treated as a literal string and may not match the URLs you intended. Rules naming EnterraMon-Poller, EnterraMon-Tester or EnterraMon-SEO are honoured where they appear in the wildcard group or alongside it. If you need a wildcard rule enforced, a network-level block on the user-agent is the reliable route.

If the robots.txt file cannot be fetched due to a timeout or server error, the bots follow a fail-open approach and proceed with the check. This prevents temporary server issues from blocking legitimate users of the free tool.

To block at the network level, configure your web server, WAF, or CDN to deny requests carrying the user-agent strings above.

If you are a paid EnterraMon Pro subscriber, the monitoring poller will visit your site on a scheduled basis from a set of dedicated poller servers in your region. To ensure reliable monitoring and notifications when things go wrong with your site you should configure your WAF or firewall to allow requests from the EnterraMon-Poller/1.0 user-agent and, where possible, from the poller server IP addresses assigned to your selected region.

The IP addresses for your region’s poller infrastructure are included in the welcome email sent when your subscription is activated. If poller IPs are added or changed over time for example when new regions come online or existing infrastructure is updated you will be notified by email.

If you have not received your poller IP list, or if you need to request it, contact us at [email protected].

The free on-demand tool at enterramon.com allows anyone to run a single-region performance, SEO, and security check against any domain, up to five checks per domain per day and ten checks per user per day. Checks are not automatically recurring.

As checks accumulate across the platform, anonymised and aggregated performance data is published openly on the Global Analytics Page. This dataset covers real-world load times, SSL status, and SEO signal trends across domains tested through the platform. No individual site data is exposed without the site owner’s consent.

If you believe Enterramon has accessed your site in error, or if you have questions about any of the bots’ behaviour, reach out directly:

[email protected]