N

nat

wisp-bridge (Wireless Internet Service Provider Bridge) is a high-performance Layer 2 MAC-NAT daemon written in pure Rust for Linux hypervisors (KVM, QEMU, Proxmox VE, libvirt). It circumvents the IEEE 802.11 3-address limitation on client (STA) interfaces, allowing virtual machines and containers to transparently obtain routable IPv4 addresses directly from upstream physical routers with sub-microsecond in-place packet translation and zero host network disruption.

QEMU virtual machines managed by systemd with bridge and MACVTAP networking

AWS VPC with subnets and base resources

Углубляемся в iptables/firewalld, разбираем цепочки и таблицы, учимся правильно, защищать свою сеть, строим NAT, проксируем трафик, пробрасываем порты. Лабораторная работа: защищаем веб сервер от DOS атак

Naive Implementation of a NAT Gateway Software