Sometimes you need to change the timestamp of a previous recorded PCAP file. To do so follow the steps below:

1. Download and install wireshark

2. check the current timestamp of you pcap file – in my case this was the following:

3. Browse to the http://www.timeanddate.com/ site to calculate the time difference in seconds between the recorded & current time.

In this case this was the following:

4. Execute  the editcap.exe program of Wireshark to create a new PCAP file containing a current timestamp:

c:\Program Files (x86)\Wireshark>editcap.exe -t 83585803 -F pcap Lab5.pcap x:\TEST3.pcap

5. Open the new PCAP file in wireshark to confirm the change in date & time