tlsproxy doesn't start

Question

Dear all, please help if you can. I'm trying to start tlsproxy at Windows Server 2016. My config file 100% has no errors as I use it at another PC. But at this machine the tlsproxy doesn't start. In windows logs I see the following message:

Log Name: Application
Source: Application Error
Date: 7/3/2025 5:06:37 PM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: via223346
Description:
Faulting application name: tlsproxy.exe, version: 1.10.0.0, time stamp: 0x670de1ad
Faulting module name: ntdll.dll, version: 10.0.14393.7254, time stamp: 0x66ac6ebc
Exception code: 0x060c201e
Fault offset: 0x00000000000cee80
Faulting process id: 0x661c
Faulting application start time: 0x01dbec23b10f61c2
Faulting application path: S:\Service\RebexTlsProxyx64\RebexTlsProxyx64\tlsproxy.exe
Faulting module path: C:\Windows\SYSTEM32\ntdll.dll
Report Id: 091f042d-742d-4bee-80f3-7ba85e478c67
Faulting package full name:
Faulting package-relative application ID:

As I see, something wrong with the connection with C:\Windows\SYSTEM32\ntdll.dll. Are there ideas how can I fix the problem and start the application?

Thank you a lot!

Answer 1

Please run the proxy from command line in interactive mode:

tlsproxy.exe run

Does it work or an error is displayed?

Also please make sure, you have specified valid logging path and also make sure that the process has write permissions to the logging directory ($tlsproxydir$\config\config.yaml):

logging:
  global:
    location: C:\tlsproxy\logs
    minLevel: Information

Does the log contains some additional error?

Comments

Thank you for making effort to help. The problem was found and fixed and it was the following: this server has a code integrity system watch (antivirus-like SW) that is preventing to run a code from a file that is unknown to it. After disabling this system, tlsproxy has started to work without any problem. Thank you a lot!

---

Thank you for the info.