General information about the Accessibility Check service

With the Availability Checking (formerly Monitoring) service, you can check the availability of various services from several locations on the Internet and set up mailings about the results of the checks.

You can also order a service administration service so that Selectel specialists can create a monitoring system for your services.

Checks

Validation is a set of conditions for testing a service for availability from different locations on the Internet.

There are 17 types of checks available.

PING	Having a connection to the server, helps to measure the latency from the test point to the server
TCP	TCP port status
UDP	UDP port status
SSH	Connection without authorization, SSH banner
SMTP/POP3/IMAP	Mail operability by selected protocol
DNS	Correctness of domain name to IP address conversion
HTTP GET	Content and response code, search for substring in returned data
HTTP HEAD	Lightweight GET request, checks if a document is available on the server by response code without loading the document body
HTTP Basic Authorization	Basic authorization mechanism
HTTP Digest	Digest authorization mechanism
FTP	FTP server availability
PostgreSQL	PostgreSQL database availability
MySQL	MySQL database availability
Redis	Redis database availability
SSL	TLS(SSL)-certificate validity period for a domain name, more details in the instructions Example of setting up TLS(SSL)-certificate verification

Cost

The service is paid monthly, the cost depends on the number of created checks, regardless of the number of check requests. The first three checks per month are free of charge.

You can view the cost and pay for checks in the control panel: in the top menu, click Products → Accessibility Checks → Order Checks.

If you want to receive check mailings via SMS, you need to pay for SMS packages additionally. You can view the cost and pay for SMS in the control panel: in the top menu, click Products → Check Availability → Reports and mailings → in the upper right corner, click Order SMS.