One of the tools in the iCal -> iCal Server troubleshooting toolbelt is to debug log HTTP connections. You can capture packets for port 8008 using tcpdump. In the following command, we’ll capture the packets over interface en0 for tcp port 8008 to a file called iCal.pcap: tcpdump -w iCal.pcap -i en0 tcp port 8008 We’ll then attempt to create a calendar entry in iCal or simply log into the server through iCal. CalDAV traffic will occur and then you can stop the tcpdump. In order to then read the tcpdump: tcpdump -nnr iCal.pcap Another option that can help to correlate traffic you see in the pcap from tcpdump is…