https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121483#M17301 <P>The only reason I can think of for reverse DNS lookups is non-FQDN objects in the policy.<BR />Any of those present?</P> Thu, 17 Jun 2021 16:33:06 GMT PhoneBoy 2021-06-17T16:33:06Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121475#M17297 <P>Hello community.</P><P>We have observed that a standby member sends&nbsp;Reverse DNS requests towards DNS server every 6 hours for different IPs.</P><P>Any idea why this is happening?</P><P>BR,</P><P>Kostas</P><P>&nbsp;</P><P>&nbsp;</P> Thu, 17 Jun 2021 14:54:11 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121475#M17297 KostasGR 2021-06-17T14:54:11Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121483#M17301 <P>The only reason I can think of for reverse DNS lookups is non-FQDN objects in the policy.<BR />Any of those present?</P> Thu, 17 Jun 2021 16:33:06 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121483#M17301 PhoneBoy 2021-06-17T16:33:06Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121531#M17313 <P>Hello PhoneBoy</P><P>Yes they are present if you mean host1 with IP 192.168.1.2 and not DNS entries either forward or reverse.</P><P>We are not using domain objects.</P><P>BR,</P><P>Kostas</P><P>&nbsp;</P> Fri, 18 Jun 2021 06:57:37 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121531#M17313 KostasGR 2021-06-18T06:57:37Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121668#M17365 <P>It's a specific type of object (not a standard host/network object):</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Screen Shot 2021-06-20 at 6.15.54 PM.png" style="width: 400px;"><img src="https://community.checkpoint.com/t5/image/serverpage/image-id/12236i03F7E8B6E63DAB6D/image-size/medium?v=v2&amp;px=400" role="button" title="Screen Shot 2021-06-20 at 6.15.54 PM.png" alt="Screen Shot 2021-06-20 at 6.15.54 PM.png" /></span></P> <P>If you don't have any of those, not sure offhand and it might be worth a TAC case to ask.</P> Mon, 21 Jun 2021 01:17:30 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/Reverse-DNS-requests-from-standby-gateway-every-6-hours/m-p/121668#M17365 PhoneBoy 2021-06-21T01:17:30Z