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Fiddler Forum
1 answer
410 views
I'm trying to use Fiddler to proxy an application that uses both HTTP and web sockets.  The web sockets are actually BLIP.

When the application runs, I see all the http traffic just fine in Fiddler, however I see no indication of the web sockets in Fiddler.  In the application logs I can see the web sockets timing out.  In this particular scenario the application waits for the data on the web sockets and no longer progresses as the data is required.  This only happens when using a fiddler proxy.

Is there something special I need to do in order to get fiddler to proxy the web sockets?  If there's a limitation, say due to not supporting BLIP, is there a way to configure fiddler to not proxy any web sockets but still proxy http?

TIA
Nick Iliev
Telerik team
 answered on 22 Mar 2023
1 answer
131 views
hi guys i have one header called x-mobile and value is MARCA=iPhone but i need change iPhone to random values automatically, it seems that with fiddler I could solve this, would it be possible? what would be the best alternative?
Nick Iliev
Telerik team
 answered on 21 Mar 2023
0 answers
69 views
hi guys i have one header called x-mobile and value is MARCA=iPhone but i need change iPhone to random values automatically, it seems that with fiddler I could solve this, would it be possible? what would be the best alternative?
Renata
Top achievements
Rank 1
 asked on 21 Mar 2023
1 answer
867 views

When I close fiddler, I can access to outlook; while using fiddler, I fail to visit it with the error message below:

UTC Date: isn't important
Client Id: isn't important
Session Id: isn't important
Client Version: 20230310007.15
BootResult: cdnError
Failed resource: https://res-geo.cdn.office.net/owamail/20230310007.15/scripts/../resources/locale/zh-hans/owa.MailBoot.json
Back Filled Errors: Unhandled Rejection: Error: Failed to load localized strings:undefined|Unhandled Rejection: Error: Failed to load localized strings:undefined|undefined:undefined|undefined:undefined
err: Error: Failed to load localized strings
esrc: InitLoc
et: ClientError
estack: c@https://outlook.live.com/mail/0/?bO=2&sessionId=isn't important
a/a<@https://outlook.live.com/mail/0/?bO=2&sessionId=isn't important
My ubuntu version is 18.04.6 and my fiddler version is v4.6.20171.26113.


Nick Iliev
Telerik team
 answered on 20 Mar 2023
1 answer
758 views

I'm trying to use fiddler v4.4.8.4 in my ubuntu 14.04 virtual machine to capture https connections, and I get "secure connection failed". Of course, when I close fiddler or don't check cature https connects, firefox works well.

I've done operations below:

1. Export root certificate to desktop, update proxy settings in firefox, import and trust fiddler certificate in firefox.

2. In firefox about:config, set:

  • security.tls.version.max=3
  • security.ssl.enable_ocsp_stapling=false

3. I've used openssl to recreate a crt ver. certificate, added it into /usr/share/ca-certificates/mozilla, and reconfigured it.

Does anybody know how to solve this problem?

Nick Iliev
Telerik team
 answered on 16 Mar 2023
1 answer
171 views

If I plug my laptop into my iMac to use the screen, the network adapter switches to  'Thunderbolt Bridge' and I stop capturing HTTP traffic.

Is it possible to configure Fiddler to always use 'Wi Fi' (which does capture HTTP traffic), so when I plug my laptop in, Fiddler continues to see traffic on the laptops internet connection?

 

(I created the shell file you suggested in your article 'Troubleshooting macOS Proxy Settings and Network Access' to determine the network adapter)

 

 

Nick Iliev
Telerik team
 updated answer on 08 Mar 2023
1 answer
635 views

HTTP/1.1 502 Fiddler - Connection Failed

 

http://static.cdninstagram.com:443

 

showing http? and port 443 this is normal?

it works but some subqueries don't work


Nick Iliev
Telerik team
 answered on 06 Mar 2023
1 answer
340 views

Hello! My name is Igor.

I have a question. In my case I have "Live Traffic (Paused)" instead of "Capturing".  I cannot track my traffic if I open browser (chrome) on my own. There is no any tracking. I can track it only if I open browser by clicking "Open browser" button inside Fiddler. How I can resolve it? What settings should I enabled or disable in my browser and maybe some system settings?
Os: MacOs Catalina 10.15.7

Fiddler 4.1.2

Chrome  110.0.5481.177 (There is no VPN)

Should I put some value to system proxy? 

Nick Iliev
Telerik team
 answered on 06 Mar 2023
1 answer
142 views

Android version 12 updated? OS was sent to compromised SD card... Core 4.1 not in Web settings? just showing under about phone? Apps use all permissions. Not updated compromised any help if possible with this device. No settings, just accessories. Please anything to block hacking open really need help until can use computer to root or buy new. Trial possible? No Bixby running, there? Knox there not running 20 apps running microphone,  Camera cannot stop anything.. since update from Samsung??? Afraid to use SD to update last OS... 

Nick Iliev
Telerik team
 answered on 04 Mar 2023
1 answer
443 views

Hey,

 

so I followed the Guides so far, Installed the Cert to my IOS Device (as user Profile and trusted it)

However, every URL I open in the Browser nor App tells me:

ERR_SSL_VERSION_OR_CIPER_MISSMATCH.

Is there any step I missed? 

Nick Iliev
Telerik team
 answered on 03 Mar 2023
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