A legitimate archive will be .zip, .7z, .rar, .tar.gz, .gz, .bz2, or .xz. Anything else is extremely suspicious.
Let’s analyze ireb 40x 41 421 rc3zip link piece by piece. ireb 40x 41 421 rc3zip link
Numbers 40x/421 resemble some router models (e.g., TP-Link Archer A6 v4.0, or Cisco 4210). Always download firmware from the official manufacturer’s website, not from a random “rc3zip link”. A legitimate archive will be