Interesting. I didn't realize that Wireshark was trying to resolve www.cnn.com 
or even why he would??
   
  We use a proxy at this site, http, https, dns, ftp, requests are sent to the 
proxy. For example, an an nslookup fails for www.cnn.com but of course IE can 
resolve and get there through the proxy.
   
  I just wanted/assumed Wireshark would read the http header for www.cnn.com 
and then capture accordingly. That was my goal. Is there a way to do that if I 
am using a proxy?
   
  Thanks,
  

Guy Harris <[EMAIL PROTECTED]> wrote:
  jacob c wrote:
> I have attached two jpg screenshots so you can see what I typed in and 
> then the error I get. Please let me know what I'm doing wrong.

As the message says, "unknown host 'www.cnn.com'"; Wireshark's unable to 
find the IP address corresponding to the domain name "www.cnn.com".

Can you get to

http://www.cnn.com/

from your Web browser? If not, then it's probably because the browser 
is just as unable to resolve the host name "www.cnn.com" to an IP 
address as is Wireshark; if you're using Wireshark to try to debug that 
problem, I'd suggest using "port domain" as your capture filter, as, to 
debug a problem that's probably a DNS problem, you'd need to capture DNS 
traffic.
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