Test Source URL button in the External Dynamic Lists popup of the Palo Alto Networks Firewall gives a URL access errorDescription<!-- div.margin { padding: 10px 40px 40px 30px; } table.tocTable { border: 1px solid; border-color: #e0e0e0; background-color: #fff; } .title { color: #d1232b; font-weight: normal; font-size: 28px; } h1 { color: #d1232b; font-weight: normal; font-size: 21px; margin-bottom: 5px; border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: #cccccc; } h2 { color: #646464; font-weight: bold; font-size: 18px; } h3 { color: #000000; font-weight: bold; font-size: 16px; } h4 { color: #666666; font-weight: bold; font-size: 15px; } h5 { color: #000000; font-weight: bold; font-size: 13px; } h6 { color: #000000; font-weight: bold; font-size:14px; } ul, ol { margin-left: 0; list-style-position: outside; } --> The Test Source URL button in the External Dynamic Lists (EDL) popup window of the Palo Alto Networks Firewall gives the URL access error shown below, not due to a SN platform issue: CausePalo Alto Networks is aware of this issue for the 8.1 code, which is documented in the PAN-OS Release Notes, version 8.1.8: https://docs.paloaltonetworks.com/content/dam/techdocs/en_US/pdf/pan-os/8-1/pan-os-release-notes/pan-os-release-notes.pdf PAN-69505When viewing an external dynamic list that requires client authentication and you Test Source URL, the firewall fails to indicate whether it can reach the external dynamic list server and returns a URL access error (Objects > External Dynamic Lists).