CGeoIPModule

Geoblocking module for IIS written in native C++

This is my first real dive into C++! If you notice ive done something incorrectly within this code, please do point it out or make a PR!

Installation

Grab the latest installer from the releases page

Server variable GEOIP_COUNTRY will contain the iso country code on successful lookup, ZZ for local addresses as defined by the IsLocalAddress() function or -- for unsuccessful lookups

Building

• Get libmaxminddb

# Clone the libmaxminddb repository with submodules
git clone --recursive https://github.com/maxmind/libmaxminddb

# Navigate to the libmaxminddb directory
cd libmaxminddb

# Create build directories for both x64 and x86 architectures
mkdir build/x64 build/x86

# Configure and build the x64 version
cmake -Bbuild/x64 -S. -DMSVC_STATIC_RUNTIME=ON -DBUILD_SHARED_LIBS=OFF -A x64
cmake --build build/x64 --config Release --target install

# Configure and build the x86 version
cmake -Bbuild/x86 -S. -DMSVC_STATIC_RUNTIME=ON -DBUILD_SHARED_LIBS=OFF -A Win32
cmake --build build/x86 --config Release --target install

• Download and install Windows SDK.

• Get Wix

• Get Wix Extension for VS2022

• Build project with Visual Studio

Reason for this modules existence

I have been using the GeoIP2blockModule for several years, and while its a well written solution, it is a bit slower (probably due to the introduction of asp.net into the request pipeline)

This module has much lower impact on IIS's performance, making it more suitable to sites that see heavy load.

Bombardier results

1.39 KB static file for testing (small to emphasize transactional throughput)

No module enabled

Statistics        Avg      Stdev        Max
  Reqs/sec     13327.21    6434.57   31616.04
  Latency        9.37ms     2.08ms    53.62ms
  HTTP codes:
    1xx - 0, 2xx - 133322, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:    22.34MB/s

C# module

Statistics        Avg      Stdev        Max
  Reqs/sec       842.83     144.49    1301.78
  Latency      147.69ms    10.07ms   252.26ms
  HTTP codes:
    1xx - 0, 2xx - 8518, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     1.41MB/s

C++ module

Statistics        Avg      Stdev        Max
  Reqs/sec      5507.09    1081.12   16498.01
  Latency       22.77ms     2.33ms   113.10ms
  HTTP codes:
    1xx - 0, 2xx - 54745, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     9.17MB/s

The dev branch has some performance improvements, though stability has not been verified.

Statistics        Avg      Stdev        Max
  Reqs/sec      9776.10     200.54   10107.25
  Latency       12.77ms     0.95ms    94.00ms
  HTTP codes:
    1xx - 0, 2xx - 97873, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:    16.84MB/s