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


before I file a bug I wanted to ask here for help:

I'm working with two different networks:Ethernet LAN in a network (work) and Wireless in a network (home).

For testing purposes, I activated preferences->name resolution->resolve network (IP) addresses in my home network. Since then, if resolve network addresses is activated, wireshark uses the home dns ( server and not the dns-server which win7 uses (something with 172..., checked with ipconfig /all). Option use an external network name resolver is checked. The problem is reproducable.

Is there any option in wireshark 1.12.6 (v1.12.6-0-gee1fce6 from master-1.12) to force change the dns server it uses?

asked 02 Jul '15, 22:42

godone's gravatar image

accept rate: 0%

There are no options in Wireshark to specify the name resolver to use.

Wireshark uses either the c-ares asynchronous DNS resolver, the GNU adns asynchronous DNS resolver, or the (synchronous) DNS resolver the system provides, depending on how Wireshark was compiled. The Windows releases are, I think, compiled to use c-ares; from a quick look at its code, c-ares should use the same DNS servers that the system's DNS resolver does, although it might not re-check for the DNS servers to use if the machine moves from one network to another.

You should file a bug on this on the Wireshark Bugzilla; please give the full Wireshark "about" information when you fill out the bug form (so that we know what version of which DNS resolver your version of Wireshark is using), and indicate whether this problem shows up if you shut down all instances of Wireshark and then, when connected to your work network, start up a new instance of Wireshark, or if it only shows up if you start it on the home network and then take the machine to work and run it there.

permanent link

answered 03 Jul '15, 00:16

Guy%20Harris's gravatar image

Guy Harris ♦♦
accept rate: 19%

(05 Jul '15, 22:15) godone
Your answer
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: 02 Jul '15, 22:42

question was seen: 1,725 times

last updated: 05 Jul '15, 22:15

p​o​w​e​r​e​d by O​S​Q​A