Home/ Questions/Q 122651
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-11T04:09:45+00:00

I have a Perl-based CGI/Fast CGI web service and want to rate-limit clients by

  • 0

I have a Perl-based CGI/Fast CGI web service and want to rate-limit clients by IP address to stop aggressive clients causing too much work.

I have looked around for some code and found Algorithm::TokenBucket in CPAN but that is for client requests; it has no persistence and has no per-user config so is not really useful for server-side rate limiting.

I am looking for suggestions for something that already exists, otherwise I’ll need to roll my own based on some simple persistence such as tie to DB_File per-IP address and some batch job that does the token management.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. I’ve used Cache::FastMmap for rate-limiting by tracking hits per IP address. It’s a cache so data will expire over time, but if you set the size and expire time right, this shouldn’t be an issue.

    The IP address is the hash key and the hash value is an array of timestamps. I have a second data structure (also backed by Cache::FastMMap) which is a hash of banned IP addresses, updated according to the data from the first structure.

    • 0