Posts tagged: #docker

Build an eBGP lab with three FRR routers in Docker, one per AS. Bring up sessions, exchange prefixes, read the AS path and filter a route.

Capture a Docker container's traffic without installing anything in it: tcpdump in a helper container, a .pcap file, nsenter, and a live pipe into Wireshark.

Set up an isolated security lab with DVWA as a target, an attacker box and a packet-capture sensor in Docker. Tested, with legal and isolation rules.

A three-zone DMZ lab in Docker: an nftables firewall between LAN, DMZ and outside, with DNAT to a web server, tested with real connection attempts.

A GNS3 Docker node can't reach the internet or resolve names. Link it to a NAT node, enable DHCP in /etc/network/interfaces, check DNS and forwarding.

Build a three-router OSPF lab with FRRouting in Docker: two LANs, a shared backbone, DR and BDR election, and real neighbor and route output.

Add latency, jitter, packet loss and a bandwidth limit between two Docker containers with tc netem, and measure each one with ping and iperf3.

Build a VLAN lab on Linux: a VLAN-aware bridge as the switch, an 802.1Q trunk, router-on-a-stick between two VLANs, all in Docker containers.