SSL certificate monitor
Using negative lookaheads for non-matching content checks in regular expression for synthetic monitors
What is a negative lookahead? A negative lookahead assertion in regular expression (RegEx) checks if the pattern inside the lookahead does not match with the input string. The syntax for the negative lookahead is (?! pattern). (?!) - negative ...
What are the SSL end-server vulnerabilities you need to be careful about?
End-server vulnerabilities are caused by improper SSL protocol configuration in a domain server. Here is a list of vulnerabilities you should look out for: 1. BEAST Browser Exploit Against SSL/TLS (BEAST) is a browser exploitation affecting the ...
DNSSEC validation results and troubleshooting tips
After adding a DNS server monitor, you can validate your DNS responses by enabling Domain Name System Security Extensions (DNSSEC). DNSSEC is a set of protocols that add an extra layer of security to the DNS lookup and exchange processes by digitally ...
Does Site24x7 use direct selenium script to perform synthetic checks?
No, Site24x7 converts the selenium scripts (HTML) to Site24x7's required format during synthetic transaction monitoring. This is to enable discovery of other identification properties (such as id, name, CSS, XPath) of the element. Selenium scripts ...
Does Site24x7 support multiple primary locations for performing sanity checks?
No, we do not support multiple primary locations for performing sanity checks in Site24x7. However, sanity checks are performed at all the configured locations, if the primary location detects the site as down. This will also help subdue false ...
Why does Site24x7 offer a lower check frequency for the secondary locations?
The primary location is where the major customer base of the application is centered. The application should be monitored more frequently from this location. Since secondary locations come next to primary with respect to customer presence, ...
How to leverage the feature "Accepted HTTP Status Codes" to track the activity of a dormant phishing website?
Use Case: You're responsible for the operation of your financial service website. Of late, you've noticed many phishing websites on the internet trying to trick your customers into entering their login credentials and other crucial information. Due ...
Default user agent used in website defacement monitor
Site24x7 uses the following user agent, by default to render the web page during monitoring: Mozilla/5.0 (Unknown; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) HLB/1.247 Related Articles: Website Defacement monitoring Add a website defacement ...
Why are the response time and content length different among different locations for the same time period in my Webpage Speed (Browser)?
Site24x7 resolves a domain by connecting the website and downloading the complete HTML source of the webpage. The content length will be captured based on the response given by the target server. Also, each object available on your page takes ...
What is Thick Lookup and Thin Lookup in Domain Expiry Monitor?
The Domain Expiry Monitor detects the expiry date of a domain via WHOIS records. WHOIS is a socket level protocol that runs over TCP port 43. A WHOIS client queries each server, starting from the root server until it receives a response containing ...
Alerting mechanism of response time threshold violation
An alert will be triggered only if there is any status change for the monitor i.e. if the monitor state changes from UP to TROUBLE or vice versa. A response time threshold breached alert will be triggered if the below conditions are satisfied: ...
Possible scenarios causing your POP Server's failure
A POP Server Monitor tests the ability of the POP3 server to accept incoming connections and respond with the correct code. In most cases, failure status is shown by your POP Server if: Failed to connect to the POP Server No response from the POP ...
Validate the DNS results
After adding a DNS Server , you can validate the DNS Server results to ensure they are correct. How it works? DNS server monitoring is performed such that we do the lookup only in the DNS server configured. We do not do a retry from multiple ...
Troubleshooting tip for the error message "DNS server refuses to perform the update"
It is essential to enter the DNS Host Name while adding a DNS Server. This error occurs if the configured DNS hostname is faulty. Reason for the error to occur: This error is caused because we have received "REFUSED" as response from the DNS server. ...
Monitoring IPv4 and IPv6 enabled Internet Facing Resources
Site24x7 lets you monitor your internet resources over IPv4 and IPv6 from our supported locations. We offer an extensive network of IPv4 and IPv6 enabled Monitoring stations that span across 7 continents. IPv4 enabled locations can only test IPv4 ...
Detect my SSL connection errors
You can detect your constant SSL connection issues by analyzing your server logs. An SSL connection error normally occurs while establishing a connection to the target server. Site24x7 suggests you to check your server access logs to know the cause ...
To set the Ping monitor to not show as down unless it's down globally
Site24x7 uses different ISPs for all our monitoring servers and each server uses a different network path to reach your server. Hence, the monitor shows as down from one location and up from another one. You can edit the "Threshold and Availability" ...
Receive down alert emails for my FTP Server when it is actually not down
This issue might be because of a different connection mode. Once this connection mode is manually set from active to passive, your FTP Transfer monitor will start working fine as expected.
The format of POST in the REST API monitor
The POST can be in JSON, FORM, Text or XML formats.
Can I configure multiple REST APIs in a single REST API monitor
Each REST API URL is considered as 1 basic monitor. Hence, you have to configure an individual REST API monitor for each URL.
In a REST API monitor, I’m using a POST HTTP Method with a JSON request body. In the content match with a JSON response type, can I undertake a second level validation along with first level validation
The REST API monitor does not support second-level JSON response validation. It supports only first level JSON response validation. However, you can check for a specific keyword in the response by using the content check feature (Response type > ...
Can I look at the output/response of the REST API monitoring polls
We do not have an option in Site24x7 to show the output/response from the API. However, based on the response type, you can configure content match as explained in the link.
The endpoint URL formats supported by SOAP web services monitor
Site24x7 web services monitor supports the following endpoint URL formats: asmx format .svc format
Reasons for the suspension of a Webpage Speed (Browser)
A Webpage Speed (Browser) check will be suspended by Site24x7 if the configured webpage doesn't meet the following requirements: If the webpage is marked under public domain If it has exceeded the allowed threshold for a page size of 5 MB If it has ...
Can I set the polling frequency for a Mail Delivery monitor to less than 15 minutes
Though the minimum polling frequency is 1 minute, setting the polling frequency to less than 15 minutes may not be applicable for all the monitors including Mail Delivery Monitor. This is because every monitoring capability goes through different ...
Can I exclude a particular element from the Webpage Speed (Browser) check
You can't exclude a particular element in a page from a Webpage Speed (Browser) check. However, you can exclude all elements from a Domain by having that domain in the block domain list. If you enable Site24x7 to send you alerts for broken objects, ...
Monitoring IPv6 enabled Internet Resources with Site24x7
You can monitor your Internet resources over IPv6 from our supported locations. We've a wide network of monitoring locations around the globe with support for over 90 IPv4, including 60+ IPv6 enabled locations. Follow the steps below to start ...
List of IPv6 enabled Monitors in Site24x7
The following Site24x7 Internet facing monitors enable you to test your IT infrastructure over our 60+ IPv6 enabled locations: Website Web Application (URL-Sequence) Port (Custom Protocol) POP Server SMTP Server Ping DNS Server FTP Server ...
Perform content matching for lazy loading pages using Webpage Speed (Browser)
The difference in content check latency in websites is done using the Webpage Speed (Browser) feature by configuring the "Website Type > Dynamic". In websites, the content match occurs immediately during the poll. There is no waiting time for the ...
Adding content checks to a monitor.
Content checks can be added as part of your monitor configuration. The following monitors support content checks: Website Web Transaction Web Transaction (Browser) Port (Custom Protocol) REST API (Text, XML and JSON) REST API Transaction (Text, XML ...