nf-HiShape

nf-HiShape is a kernel module for traffic shaping according to the source IP address. It limits the bandwidth usage of user-defined IP-address ranges and was implemented by the constraint of high-performance operation as well as easy usage.

The package includes the module itself and a user-land tool for its configuration.

The main purpose for development was the high performance bandwidth throttling for mitigating DDoS attacks.

Detailed Information

nf-HiShape registers a definable netfilter hook (e.g. for forwarded packets). For every packet that should be forwarded this hook is called. nf-HiShape decides if the packet should be dropped, queued or accepted based on the network input device and the entitled bandwith previously assigned to this IP address of the packet. The device can be specified by the module parameter 'device' or later using the userland tool. If no device is given, packets of all devices will be filtered.

Prerequisites

Prepared linux kernel headers

Compilation & Installation

inside the source folder, type

:~# make
:~# sudo make install
:~# sudo mknod /dev/nf-hishape c 100 0

Module load

:~# modprobe nf-hishape <key=value ...>

Module unload

:~# rmmod nf-hishape

Module parameters

device          the network device at which the filtering should be processed
                (e.g. eth0)
                if none is given, the filtering is done on all devices
              
hook            position in the netfilter stack where the shaping should be
                processed
                possible values are:
                   pre    for pre-routing
                   in     for input
                   for    for forward
                   out    for output
                   post   for post-routing
                
priority        priority of the whole packet filter module
                small number indicates high priority

Userland tool

Usage: ./nf-hishape [OPTION...]

 Options:
 
  -L, --list               List the ranges
  -F, --flush              Flush the ranges
  -S, --set=FILE           Load ranges from FILE
  -i, --interface=DEVICE   Set interface to DEVICE
  -a, --any_device         Unset interface
  -p, --print_interface    Print interface
  -f, --from               Start ip address for a new range (integer or dotted notation)
  -t, --to                 End ip address for a new range (integer or dotted notation)
  -l, --limit              Limit of the new range in kbyte/s
  -h, --help               Print this message and exit

Copyright/ License/ Credits

You may not use this file except under the terms of the accompanying license.

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This is free software. Licensed under the GNU GPL, Version 3.0.
There is NO WARRANTY, to the extent permitted by law.

bot-unit/nf-hishape