topic unknown port 137 from GP users to Public IPs in General Topics https://live.paloaltonetworks.com/t5/general-topics/unknown-port-137-from-gp-users-to-public-ips/m-p/318026#M81708 <P><SPAN><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Capture.PNG" style="width: 999px;"><img src="https://live.paloaltonetworks.com/t5/image/serverpage/image-id/24652iCDE4D7576AD2EAE5/image-size/large/is-moderation-mode/true?v=v2&amp;px=999" role="button" title="Capture.PNG" alt="Capture.PNG" /></span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;I have GP users whose logs show multiple attempts to public IPs on port 137. I have checked this KB&nbsp;</SPAN><A href="https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClLfCAK" target="_blank" rel="noopener">https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClLfCAK</A><SPAN>&nbsp;and made sure user-id is not enabled on Internet interface but I have it enabled on GP interface.Image above shows the NBNS pcap captured on firewall.Anyone experiencing this?</SPAN></P> Wed, 25 Mar 2020 01:29:20 GMT SThatipelly 2020-03-25T01:29:20Z unknown port 137 from GP users to Public IPs https://live.paloaltonetworks.com/t5/general-topics/unknown-port-137-from-gp-users-to-public-ips/m-p/318026#M81708 <P><SPAN><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Capture.PNG" style="width: 999px;"><img src="https://live.paloaltonetworks.com/t5/image/serverpage/image-id/24652iCDE4D7576AD2EAE5/image-size/large/is-moderation-mode/true?v=v2&amp;px=999" role="button" title="Capture.PNG" alt="Capture.PNG" /></span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;I have GP users whose logs show multiple attempts to public IPs on port 137. I have checked this KB&nbsp;</SPAN><A href="https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClLfCAK" target="_blank" rel="noopener">https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClLfCAK</A><SPAN>&nbsp;and made sure user-id is not enabled on Internet interface but I have it enabled on GP interface.Image above shows the NBNS pcap captured on firewall.Anyone experiencing this?</SPAN></P> Wed, 25 Mar 2020 01:29:20 GMT https://live.paloaltonetworks.com/t5/general-topics/unknown-port-137-from-gp-users-to-public-ips/m-p/318026#M81708 SThatipelly 2020-03-25T01:29:20Z Re: unknown port 137 from GP users to Public IPs https://live.paloaltonetworks.com/t5/general-topics/unknown-port-137-from-gp-users-to-public-ips/m-p/320323#M82051 <P>If you are seeing port 137 traffic from GP machines to Public Internet IP's then it sounds like the machines are trying to use netbios for file sharing or something else is going on.&nbsp;</P> <P>Are you allowing port 137 (or 135-139) thru the firewall to the Internet?</P> Thu, 02 Apr 2020 15:12:26 GMT https://live.paloaltonetworks.com/t5/general-topics/unknown-port-137-from-gp-users-to-public-ips/m-p/320323#M82051 jdelio 2020-04-02T15:12:26Z