USER MANUAL
Peplink Balance Series
DNS lookups will be issued to test the connectivity with target DNS servers. The connection will be treated as up if
DNS responses are received from either one or both of the servers, regardless of whether the result was positive or
negative.
Health Check DNS
Servers
This field allows you to specify two DNS hosts’ IP address with which connectivity is to be
tested via DNS Lookup.
If 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, field Host 1 must be filled and field Host 2 is optional.
If the box Include public DNS servers is selected 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 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 the connectivity with configurable URLs and strings to match.
URL1
WAN Settings > WAN Edit > Health Check Settings >URL1
The URL will be retrieved when performing an HTTP health check. When String to Match is
left blank, a health check will pass if the HTTP return code is between 200 and 299 (Note:
HTTP redirection codes 301 or 302 are treated as failures). When String to Match 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
WAN Settings > WAN Edit > Health Check Settings >URL2
If URL2 is also provided, a health check will pass if either one of the tests passed.
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