Hello,

this might not be directly related to Fiddler functionality, but I've been trying to cleanly reinstall Fiddler with no luck. What I did:

- I removed the extracted `fiddler-mac` directory from my `/Applications`.
- I removed `Fiddler2` directory from my home dir.
- I uninstalled Mono.
- I installed Mono and extracted `fiddler-mac` ZIP archive again to `/Applications`.

When I run `mono Fiddler.exe`, Fiddler keeps maintaining its previous UI states (window size, column-widths, toggled options, etc.) and it doesn't even reset the "About" info, i.e. "You've run Progress Telerik Fiddler: 32 times." instead of resetting the count to 0.

Are there any Fiddler-related preference/config files stored somewhere which I may have missed to remove? (I have looked into `~/Library/Preferences` and `"~/Library/Application\ Support"` to no avail)

---------------------------
Awww, Fiddlesticks!
---------------------------
Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report at http://www.telerik.com/forums/fiddler.

The type initializer for 'Mono.Unix.Native.Syscall' threw an exception.

Type: System.TypeInitializationException
Source: Fiddler
  at Fiddler.CONFIG.get_IsMac () [0x00007] in <616b130fa1474630b442fde0f9112534>:0
  at .•..ctor () [0x00061] in <616b130fa1474630b442fde0f9112534>:0
  at (wrapper remoting-invoke-with-check) .•:.ctor ()
  at Fiddler.AutoResponder..ctor () [0x0001c] in <616b130fa1474630b442fde0f9112534>:0
  at Fiddler.frmViewer.‹• (System.String[] ˆ•) [0x00168] in <616b130fa1474630b442fde0f9112534>:0
  at Fiddler.frmViewer.‡• (System.String[] ˆ•) [0x00016] in <616b130fa1474630b442fde0f9112534>:0

System.EntryPointNotFoundException: Mono_Posix_Syscall_get_at_fdcwd
  at (wrapper managed-to-native) Mono.Unix.Native.Syscall:get_at_fdcwd ()
  at Mono.Unix.Native.Syscall..cctor () [0x0000a] in <0216319ce51c4b67aa757f28510856aa>:0
Fiddler v4.6.20171.26113 (x86 x86) [.NET 4.0.30319.42000 on Microsoft Windows NT 6.1.7601.65536 Service Pack 1]
---------------------------
OK   
---------------------------

Hi ,
How can I decode the  WWW-Authenticate header in c#.
I have the following header :
Authorization: Negotiate TlRMTVNTUAADAAAAGAAYAIAAAAAYABgAmAAAAAYABgBYAAAADAAMAF4AAAAWABYAagAAABAAEACwAAAAFYKI4gYC8CMAAAAPffbxvOGkL8ns+08wCF8mpUcARQBSAHMAawBhAHIAbgBpAFMASwBBAFIATgBJAC0ATQBPAEIATABmpA4p85r6qgAAAAAAAAAAAAAAAAAAAADhTsbpNSiV0RYcgZydNiGaRJqQVfHQAM80vSRnAZubLRwjwE2TnLrY

I (guess), that the information presented in the "Auth" tab is the decoding of this header.
A'm I correct ?
How can I do it in C# ?
thx
Sagi

I upgraded to v4.6.2.0 and the HTTPS decryption option is causing sites to fail to load in my browser. I have tried disabling and re-enabling decryption without any success. This was working before the upgrade. Does anyone have any suggestions?

Hello, I have downloaded Fiddler for Mac from this link: https://www.telerik.com/download/fiddler and have followed the installation instructions regarding mono and placing fiddler.exe in a writable directory. When running "mono fiddler.exe" from my terminal, Fiddler starts up. However, it is not automatically capturing web traffic like I am used to it doing on Windows.

Is there some other step that I need to perform on Mac for it to start capturing web traffic?

- John

Hello

i have problem can't see data in Tunnel possible can fix my problem

or how to setting for see data 

 

i use android app on proxy, if disable Decryption HTTPs app can login

when enable Decryption HTTPs app can't login 

 

i install Certificate to Desktop and mobile done and

" this tunnel will be shown in the Web Sessions list. "

how to see ?

 

thankyou

Hello

i have problem about sniffer android app not use FiddlerRoot.cer trusting the certificate. 

how to make app use FiddlerRoot.cer trusting the certificate ?

or have solution for fix ?

 

A SSLv3-compatible ClientHello handshake was found. Fiddler extracted the parameters below.

Version: 3.1 (TLS/1.0)
Random: 5B 58 4D 7F 62 A3 B1 10 57 97 F2 D2 55 17 F5 E0 65 8A 01 07 F2 3E 77 B1 A4 CC C2 79 02 BC 46 62
"Time": 5/9/2580 21:55:23
SessionID: empty
Extensions: 
server_name mobile-api-gateway.xxxx.com
ec_point_formats uncompressed [0x0], ansiX962_compressed_prime [0x1], ansiX962_compressed_char2  [0x2]
elliptic_curves sect571r1 [0xE], sect571k1 [0xD], secp521r1 [0x19], sect409k1 [0xB], sect409r1 [0xC], secp384r1 [0x18], sect283k1 [0x9], sect283r1 [0xA], secp256k1 [0x16], secp256r1 [0x17], sect239k1 [0x8], sect233k1 [0x6], sect233r1 [0x7], secp224k1 [0x14], secp224r1 [0x15], sect193r1 [0x4], sect193r2 [0x5], secp192k1 [0x12], secp192r1 [0x13], sect163k1 [0x1], sect163r1 [0x2], sect163r2 [0x3], secp160k1 [0xF], secp160r1 [0x10], secp160r2 [0x11]
SessionTicket empty
Ciphers: 
[002F] TLS_RSA_AES_128_SHA
[0035] TLS_RSA_AES_256_SHA
[C013] TLS1_CK_ECDHE_RSA_WITH_AES_128_CBC_SHA
[C014] TLS1_CK_ECDHE_RSA_WITH_AES_256_CBC_SHA
[000A] SSL_RSA_WITH_3DES_EDE_SHA
[00FF] TLS_EMPTY_RENEGOTIATION_INFO_SCSV

Compression: 
[00] NO_COMPRESSION

************************************

 

Encrypted HTTPS traffic flows through this CONNECT tunnel. HTTPS Decryption is enabled in Fiddler, so decrypted sessions running in this tunnel will be shown in the Web Sessions list.

Secure Protocol: Tls
Cipher: Aes128 128bits
Hash Algorithm: Sha1 160bits
Key Exchange: ECDHE_RSA (0xae06) 256bits

== Server Certificate ==========
[Subject]
  CN=*.xxx.com, O="xxxx Co., Ltd.", L=xxxx S=xxxx, C=xxxx

[Issuer]
  CN=Entrust Certification Authority - L1K, OU="(c) 2012 Entrust, Inc. - for authorized use only", OU=See www.entrust.net/legal-terms, O="Entrust, Inc.", C=US

[Serial Number]
  75232D3D56BA3EA30000000050DD25E9

[Not Before]
  30/6/2560 10:08:38

[Not After]
  8/8/2562 10:38:36

[Thumbprint]
  6D0BB124B87D9747714104A2C1114F20276E9D08

[SubjectAltNames]
*.xxxx.com, xxxx.com

 

thankyou

    Apparently, Google made some changes in later versions of Android that prevent the usage of user certificates in apps. Is there any way to bypass this? I am rooted, by the way.

I am having problems decrypting any SSL traffic on my Windows 10 PC.

I have tried Eric's post on resetting certificates to no avail.

I am seeing this on all SSL requests, this one is for the first request to fiddler to check for fiddler updates, for example: 

09:50:02:3744 fiddler.network.https> HTTPS handshake to www.fiddler2.com (for #1) failed. System.Security.Cryptography.CryptographicException Unspecified error

To try and isolate the issue I installed Charles and it is able to decrpyt SSL requests so I dont believe it is a system-wide / local network issue.

Any help much appreciated as Fiddler is such an excellent tool.

Is it possible for me to block a CONNECT session that is using TLS 1.1 or TLS 1.0?

 

I see that I can script 

if (!oSession.HTTPMethodIs("CONNECT")) 
{ 
}

but I'm not sure what to do to determine TLS version inside the if clause.