will be treated as up if DNS responses are received from one or both of the servers,
regardless of whether the result was positive or negative.
DNS Servers: This field allows you to specify two DNS hosts’ IP addresses with which
connectivity is to be tested via DNS Lookup.
If the Use first two DNS servers as Health Check DNS Servers is checked, the first
two DNS servers will be the DNS lookup targets for checking a connection's health. If the
box is not checked, Host 1 must be filled, while a value for Host 2 is optional.
If the Include public DNS servers is checked and no response is received from all
specified DNS servers, DNS lookups will also be issued to some public DNS servers. A
WAN connection will be treated as down only if there is also no response received from
the public DNS servers.
Connections will be considered as up if DNS responses are received from any one of the
health check DNS servers, regardless of a positive or negative result. By default, the first
two DNS servers of the WAN connection are used as the health check DNS servers.
● Health Check Method: HTTP
HTTP connections will be issued to test connectivity with configurable URLs and strings
to match.
URL 1: The URL will be retrieved when performing an HTTP health check. When
Matching String is left blank, a health check will pass if the HTTP return code is
between 200 and 299 (Note: HTTP redirect codes 301 or 302 are treated as failures).
When Matching String is filled, a health check will pass if the HTTP return code is
between 200 and 299 and if the HTTP response content contains the string.
URL 2: If URL 2 is also provided, a health check will pass if either one of the tests
passed.
To Next Page
Loading...
Need help?
General