Tag Archives: DNS filtering

DNS server filtering Delphi

When you need to filter a DNS request, there are number of ways to do it:

  • Add an entry to the hosts file.
  • Intercept the UDP data and modify it.
  • Use NSP (Named Space Provider)
  • Use detour to catch the DNS functions (there’s a post of the drawbacks of detours)

Komodia’s DNS Hijack├é┬áintercepts all DNS requests before they are leaving the machine and allows the programmer to perform any lookup he desires, this can be done with any language that supports DLLs such as: C/C++, Delphi, .Net, VB