I have been unable to set fiddler as the system proxy ever since updating to the Windows 10 "creators update"(Version 1703, build 15063.332). All fields on the LAN settings window are blank, and it won't let me update them. I enter "127.0.0.1" and "8888" and after the advanced settings window closes, clicking "ok" does NOTHING!!! Reinstalling fiddler ALSO does NOTHING!!!!

After one cumulative update of Windows, the problem got worse: 

" 22:17:47:1692 ! WARNING: Port 8888 is already in use (for at least some IP addresses) by 'mobileservice:13340' "

At startup, a dialog asks to reassign fiddler to a different random port. If I decline, the attached error dialog shows up.

Any suggestions?

When I am trying to capture traffic of my website that deployed over HTTPS protocol along with proxy configuration in my local network, system throw following error. I have tried all possible setting in Tools -> Fiddler Option -> HTTPS and Connection but nothing work:

[Fiddler] The connection to the upstream proxy/gateway failed. Closing Fiddler, changing your system proxy settings, and restarting Fiddler may help. 
System.Exception Upstream Gateway refused requested CONNECT.


Please help me in fixing this problem, as I need to record some performance matrix for my website.

New to fiddler. I am trying to do a REST API curl request but getting a red 502 response.

Here is the curl request:

 

curl -X GET https://sandbox.forte.net/api/v3/organizations/org_333251/locations/loc_191620/customers/
-H "Content-Type: application/json"
-H "X-Forte-Auth-Organization-Id: org_333251" 
-H "Authorization: Basic Mjk3NjMwMGJiNjlmMDhiMmRmZTU3NzU0ZDkyMWI4Y2Q6NmU4N2QwZjUwMmE4ZGE5M"
-H "Accept: application/json"
-H "Cache-Control: no-cache"

 

It is a sandbox account so no problem if you want to play around with it.

All the credentials are good, and it works in Postman, but for the life of me I can't get it to work in Fiddler :(

 

What am I missing?

 

Dear Guys,
For some weeks now, I often have severe memory problems with Fiddler. Fiddler takes all memory, then all other applications need to access the pagefile and quickly the system becomes unusable. This happens every two days or once a week or so. It happens today and it happened two days ago.
* I don't stream any audio or video.
*  "Keep only" is set to 100.
* To me, it seems this is somehow correlated to Windows downloading some update packages. Not sure, though. 
Fiddler Version:
v4.6.20171.7553
Built: Fr, 27. Jan 2017
64-bit AMD64, VM: 49,0mb, WS: 84,0mb
.NET 4.6.2 WinNT 10.0.15063.0
If client aborts while streaming, finish if session visible

!memory in QuickExec Box gives:
11:57:33:4986 Fiddler.Network.ProtocolViolation - [#278] The Request's Host header did not match the URL's host component.
URL Host: a-0020.a-msedge.net
Header Host: officecdn.microsoft.com
11:57:33:6278 Fiddler.Network.ProtocolViolation - [#279] The Request's Host header did not match the URL's host component.
URL Host: a-0020.a-msedge.net
Header Host: officecdn.microsoft.com
11:57:33:7550 Fiddler.Network.ProtocolViolation - [#280] The Request's Host header did not match the URL's host component.
URL Host: e1723.dscd.akamaiedge.net
Header Host: officecdn.microsoft.com
11:57:33:9009 Fiddler.Network.ProtocolViolation - [#281] The Request's Host header did not match the URL's host component.
URL Host: e1723.dscd.akamaiedge.net
Header Host: officecdn.microsoft.com
12:09:15:5155 fiddler.network.readresponse.failure> Session #346 raised exception System.Net.Sockets.SocketException Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
12:09:15:5155 fiddler.network.readresponse.failure> Session #347 raised exception System.Net.Sockets.SocketException Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
12:13:38:7092 fiddler.network.readresponse.failure> Session #352 raised exception System.Net.Sockets.SocketException Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
12:13:38:7092 fiddler.network.readresponse.failure> Session #353 raised exception System.Net.Sockets.SocketException Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
12:14:03:7589 MEMORY ANALYSIS
-= Fiddler Memory Usage =-
Process Bitness: 64
OS Version: 10.0.15063.0
CLR Version: 4.0.30319.42000
LOH Compact: Supported
The Web Sessions list contains 101 Sessions, accounting for:
 137.036 bytes of headers
 3.152.234 bytes of bodies
 0 bytes of WebSocket messages
-PRE-GC-
 GCAllocated: 13.348.669.776
 VirtualMemory: 14.230.929.408
 WorkingSet: 2.936.229.888
-POST-GC-
 GCAllocated: 9.598.081.592
 VirtualMemory: 9.817.096.192
 WorkingSet: 1.418.104.832
-= System Memory Info=-
 Total Physical: 8.501.952.512
 Available: 3.918.082.048
 Total Virtual: 140.737.488.224.256
 Available: 140.690.886.983.680
 Total PageFile: 21.374.271.488
 Available: 7.160.733.696
 
 
After some seconds, all the freed memory is taken up again. !memory gives then:
12:15:45:7548 MEMORY ANALYSIS
-= Fiddler Memory Usage =-
Process Bitness: 64
OS Version: 10.0.15063.0
CLR Version: 4.0.30319.42000
LOH Compact: Supported
The Web Sessions list contains 101 Sessions, accounting for:
 137.036 bytes of headers
 3.152.234 bytes of bodies
 0 bytes of WebSocket messages
-PRE-GC-
 GCAllocated: 12.447.535.864
 VirtualMemory: 12.671.918.080
 WorkingSet: 5.590.409.216
-POST-GC-
 GCAllocated: 10.362.271.696
 VirtualMemory: 10.570.149.888
 WorkingSet: 3.508.121.600
-= System Memory Info=-
 Total Physical: 8.501.952.512
 Available: 3.343.585.280
 Total Virtual: 140.737.488.224.256
 Available: 140.690.219.040.768
 Total PageFile: 20.293.812.224
 Available: 5.401.878.528
 
Four minutes later:
12:19:17:0911 MEMORY ANALYSIS
-= Fiddler Memory Usage =-
Process Bitness: 64
OS Version: 10.0.15063.0
CLR Version: 4.0.30319.42000
LOH Compact: Supported
The Web Sessions list contains 101 Sessions, accounting for:
 137.036 bytes of headers
 3.152.234 bytes of bodies
 0 bytes of WebSocket messages
-PRE-GC-
 GCAllocated: 13.218.860.992
 VirtualMemory: 13.464.555.520
 WorkingSet: 1.922.998.272
-POST-GC-
 GCAllocated: 10.384.166.112
 VirtualMemory: 10.614.800.384
 WorkingSet: 392.175.616
-= System Memory Info=-
 Total Physical: 8.501.952.512
 Available: 2.732.867.584
 Total Virtual: 140.737.488.224.256
 Available: 140.690.356.396.032
 Total PageFile: 21.373.087.744
 Available: 6.433.079.296 
 
12:25:04:8333 MEMORY ANALYSIS
-= Fiddler Memory Usage =-
Process Bitness: 64
OS Version: 10.0.15063.0
CLR Version: 4.0.30319.42000
LOH Compact: Supported
The Web Sessions list contains 101 Sessions, accounting for:
 137.036 bytes of headers
 3.152.234 bytes of bodies
 0 bytes of WebSocket messages
-PRE-GC-
 GCAllocated: 12.335.226.200
 VirtualMemory: 14.014.726.144
 WorkingSet: 2.947.018.752
-POST-GC-
 GCAllocated: 9.590.238.304
 VirtualMemory: 9.818.116.096
 WorkingSet: 1.271.791.616
-= System Memory Info=-
 Total Physical: 8.501.952.512
 Available: 4.442.357.760
 Total Virtual: 140.737.488.224.256
 Available: 140.691.292.782.592
 Total PageFile: 24.630.853.632
 Available: 10.420.068.352
 
 
 Process Top List at 12:24 o'clock: 774.png

I have searched other forum discussions on this matter, and nothing works!

Every time I start fiddler I receive the error 19:49:11:2323 Fiddler.Network.AutoProxy> AutoProxy Detection failed.

I have deleted and reinstalled the certs several times and nothing works. 

I want to dig into HCPSS requests, but can't because of this error.

Hi!

I'm playing around autoresponder and its features.

Have tried to use *header action but it does not seem to work.

Rule itself is quite clear: METHOD:GET - to be sure I've not messed at this point I also tried it with action *drop and eveything seems to work("no connection" error message was shown in Chrome)

Actions were tried:

1. *header:Content-Type=application/octet-stream -- existing header, dash-style naming

2. *header:ContentType=application/octet-stream -- existing header, camelCase naming

3. *header:X-OWN=test -- new header, dash-style naming

4. *header:XOWN=test -- new header, camelCase naming

And then I've looked intoChrome's Developer Tools and there was no such headers shown.

 

Or is *header action applied to request(while I checked response)?

 

Have somebody used *header action successfully?

 

Thank you.

Hi!

There is something seems to be a bug.

For rule that contains additional check(e.g. METHOD:) alongside with URL match clicking "Test..." shows error message "Sorry, the TEST command can only be used with Rules that evaluate the URL.

Maybe it's because it's possible to edit matching pattern right in the "Test" popup(so it would need aditionally to parse rule string, take URL matching separately from other flags, allow it to be edited and finally to join all that again).

But currently it requires additional efforts to check such kind of rules:

1. Cut all the flags except REGEX:/EXCEPT:/<partial URL matching string>

2. Test it, modify if needed

3. Return all the flags back

4. Save the rule

Hi

Hi

I need to capture https traffic. I can do it using UI but i need to enable, configure and start fiddler from command line to capture https trafic  (Windows)

Is it possible to enable https capturing using only cmd in Windows?

I can start the fiddler from cmd in quit mode.

I can update keys in the register.

I can generate ssl certificate using makecert.exe.

I have no idea how to set the certificate to fiddler.

How can I force fiddler to generate ssl certificate automatically?

Where fiddler stores its private and public certificate?

 

P.s. I'll be appreciate if anyone can help me.

安装时报错

There are many issues of in my mac, but most painful is this copy ad paste issue. I need to create a document with the list of API responses and request but when I select text and try to copy and paste in notepad, it's not pasting.

Please if anyone can help me!