Do you work on COVID-19 related projects? Was your business significantly affected by the pandemic?

If the answer to previous questions is yes, Hexadecimal will waive the subscription fee for you until the vaccine is discovered.

Workers

Locations

As of today, uptime and certificate checks are performed from the following locations:

IP addresses

The full list of IPv4 and IPv6 addresses from where uptime and certificate checks are performed:

3.229.127.34
35.155.105.105
54.250.58.166
18.130.94.137

2600:1f18:64a1:8f00:9471:4ca7:2abd:a742
2600:1f13:890:8303:bddc:6607:233d:c3b8
2406:da14:c68:e201:4da5:6f49:a741:7c25
2a05:d01c:db:c101:9e5c:2aed:c051:76f1

As a convenience, these lists are also available as UTF-8 encoded text files:

If your firewall or Network ACL blocks incoming TCP connections, make sure to whitelist these IP addresses to avoid false positives.

User agent

Every HTTP request that workers send has a user agent string which is set to:

Hexadecimal/1.0 (+https://tryhexadecimal.com/docs/workers)

To prevent abuse, the user agent string can’t be overwritten.

If you are seeing any malicious traffic coming from this user agent, please get in touch.

Analytics

If you track visitor data in your web analytics, you might want to exclude requests originating from workers’ IP addresses to get more accurate reporting. Alternatively, you can filter out requests by the user agent since it is immutable.