Xtables-addons provides extra modules for iptables not present in the kernel, and is the successor of patch-o-matic. extensions includes new targets like tee, tarpit, chaos, or modules like geoip and account.

this package provides the userspace libraries for iptables to use extensions in the xtables-addons-modules package.

note: this package is only useful with a corresponding xtables-addons-dkms package, which you may produce with module-assistant:

module-assistant auto-install xtables-addons-source