In Splunk 7.2.x opening an external link in a new tab from the app navigation bar works. Example data/ui/nav/default.xml file including a link to the Splunk Developer Portal:
Please Note:-It works only for 7.2.x versions and above.Tried it with lower versions(for ex.6.5.x) of splunk and it's not working.For 7.2.x it works for pre-defined apps as well as custom apps also.
@saramamurthy
You can use target="_blank"
in link. Please try below sample dashboard.
<dashboard>
<label>HTMLLink</label>
<row>
<panel>
<html>
<a href="http://www.google.com" target="_blank">Google</a>
</html>
</panel>
<panel>
<table>
<search>
<query>| makeresults | eval Data="Google"</query>
<earliest>-24h@h</earliest>
<latest>now</latest>
</search>
<option name="count">10</option>
<option name="drilldown">cell</option>
<option name="refresh.display">progressbar</option>
<drilldown>
<link target="_blank">http://www.google.com</link>
</drilldown>
</table>
</panel>
</row>
</dashboard>