This is a migrated thread and some comments may be shown as answers.

Fiddler Capacity?

5 Answers 61 Views
Fiddler Classic
This is a migrated thread and some comments may be shown as answers.
Sean
Top achievements
Rank 1
Sean asked on 13 Aug 2014, 04:31 AM
Hi there,

This is my first time using fiddler so apologies if I'm wrong anywhere...

I have to do 24 hour monitoring with Fiddler to capture an errant program which never seems to be working at any particular time.

Trouble is it does 5-7GB downloads in an hour and I need to locate it.

what is the capacity of Fiddler and how do I get it to right out on intervals?  Last nights 12 hour session seemed to loop and overwrite earlier entries

Many thanks in advance,

regards
Seán

5 Answers, 1 is accepted

Sort by
0
Eric Lawrence
Telerik team
answered on 14 Aug 2014, 01:38 PM
Hello, Sean--

Fiddler does not have a "fixed capacity" of any sort; if you are running the 64bit version, Fiddler will log traffic until you run out of memory/disk space.

When you say "an errant program"-- what makes it errant? If the criteria are something that can be computed, you could configure Fiddler to keep only the errant traffic and discard everything else.

You can configure Fiddler to periodically dump all of its traffic to disk on the schedule of your choosing, but this would require writing some script, and it wouldn't be that different than simply letting Fiddler keep all of the traffic in (virtual) memory.

Regards,
Eric Lawrence
Telerik
 

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

 
0
Sean
Top achievements
Rank 1
answered on 14 Aug 2014, 02:20 PM
Thanks Eric,  I subsequently found that a program had downloaded >10G onto my C: drive...

Anyway the errant program problem...

A simple network with a 4G router...everything going into a switch.

Hourly I have a script that takes the stats from the router which shows normal usage for 23 hours a day until between (pick any hour) and I see a 5-10GB download from the net.

OK so I remove everything from the router and enforce whitelists on MAC address and made my PC Fiddler Proxy.

What I've discovered is that my iPADs are the culprit. - There is no cloud there is no X, Y, Z...but whenever it connects to the network I see within the next 24 hours a Mega download of 5-10GB.

I see the traffic from the iPad in Fiddler, but not the 10G...and I have no-idea where it is coming from.  But when I remove it from the network...there is no traffic of this size...

So I'm trying to analyse which of the programs on the iPad is causing a invisible mega download on my net.

It's absolutely kiing my service.  I didn't realize until last week when I looked and saw in three weeks I'd downloaded in excess of 250G...but where?  Still looking...

Thanks and regards
Seán

0
Graeme
Top achievements
Rank 1
answered on 14 Aug 2014, 04:21 PM
Maybe whatever is doing that large download is not using http or https?
0
Sean
Top achievements
Rank 1
answered on 14 Aug 2014, 04:44 PM
Yeah, that's my problem.  I have fiddler recording HTTP, HTTPS and FTP...what other protocols am I missing and can Fiddler recognize them?  I can only think of streaming...but the ipads isn't (shouldn't) be doing that...and it's generally not in use at 3am..

If anyone could suggest any ideas that would be great...

thanks and best regards
Seán

0
Eric Lawrence
Telerik team
answered on 14 Aug 2014, 07:55 PM
Hi, Sean--

Fiddler only captures traffic that is sent to it (e.g. for which it is acting as a proxy). It supports HTTP, HTTPS and FTP, but there are many other TCP/IP protocols including streaming protocols which Fiddler doesn't display.

Typically, you'd want to get a TCP/IP dump using Wireshark or TCP Dump and then have a look at that traffic at the TCP level.

Regards,
Eric Lawrence
Telerik
 

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

 
Tags
Fiddler Classic
Asked by
Sean
Top achievements
Rank 1
Answers by
Eric Lawrence
Telerik team
Sean
Top achievements
Rank 1
Graeme
Top achievements
Rank 1
Share this question
or