Purifier is a fast transparent stateful firewall powered by DPDK. It was created to solve transport layer DDoS attacks.

• Get DPDK1.7.1

• If kernel version >= 3.19.0 use patch

patch -p0 < ../dpdk1.7.patch

• Install DPDK

• Reserve huge pages memory

mkdir -p /mnt/huge
mount -t hugetlbfs nodev /mnt/huge
echo 1024 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages

• Load Modules to Enable Userspace IO

sudo modprobe uio
sudo insmod kmod/igb_uio.ko

• Define DPDK environment variable set path to DPDK

export RTE_SDK=/path/to/rte_sdk

• set target (In most cases it will be x86_64-native-linuxapp-gcc)

export RTE_TARGET=x86_64-native-linuxapp-gcc

• Compile the application

cd ../src
make

• [Bind NIC ports to igb_uio driver] (https://dpdk.org/doc/guides/linux_gsg/build_dpdk.html#binding-and-unbinding-network-ports-to-from-the-kernel-modules)

For example to bind eth1 and eth2 from the current driver and move to use igb_uio

./tools/dpdk_nic_bind.py --bind=igb_uio eth1
./tools/dpdk_nic_bind.py --bind=igb_uio eth2

Run the app

./build/purifier -c 0x7 -n 4

• Currently tested under ubuntu 14.04 LTS
• Work under dpdk1.7.1
• Tested with ixgbe NIC's

• Work with the latest DPDK version
• Add zero window mechanism
• Add mbuf extension
• Add ip defragmentation
• Add telnet/ssh support
• Rework lookup with SSE/AVX