This is our old Q&A Site. Please post any new questions and answers at


I am running a captures on my PC of a SSL transfer to a server about 14 hops away. ICMP gives me an average roundtrip time in the order of 160ms.

But when looking at this through wireshark 1.12.9, it appears the displayed time delta averages about 200 Microseconds. This seems consistent throughout the capture (I use the IO graph). This time value seems impossibly small given the distance between the nodes. I have max latency values of 100ms and min values of 10microseconds in this set of data. When calculating max, min and average are calculated through the IO graph (with a DISPLAY FILTER in the main window restricting it to the TCP conversation).

Additionally the conversation seems to be tit for tat, i.e one packet sent for me, then one from the server and the pattern repeats (I was thinking maybe my results were due to consecutive server transmits, but the Seq and Ack values make sense for these packets in sequence with incredibly small latency).

Could this be an issue with my PC mucking up the timestamps for sub millisecond values?


asked 09 Mar '16, 00:10

Edward%20Teach's gravatar image

Edward Teach
accept rate: 0%

edited 09 Mar '16, 00:14

It would be easier to understand what is the issue if you could post the capture (maybe after shaving away the payload using tracewrangler if you are afraid of data leakage), but is there any NAT or proxy device between the session client and server or are all the intermediate devices just routers? Also, a capture taken simultaneously at the client and server side could bring more light.

(09 Mar '16, 00:27) sindy
Be the first one to answer this question!
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:


question asked: 09 Mar '16, 00:10

question was seen: 1,580 times

last updated: 09 Mar '16, 00:27

p​o​w​e​r​e​d by O​S​Q​A