A practical learning path for operating BGP safely before requesting public Internet number resources or a FreeTransit tunnel.
A public ASN, an IP prefix and a BGP session are production Internet resources. They are not a first BGP laboratory. A mistake can make your own network unreachable, leak routes learned from one provider to another, or announce address space that does not belong to you.
FreeTransit helps community networks obtain and use Internet number resources. We also expect applicants to understand the basic operational responsibility that comes with those resources. You do not need to be an expert, but you should be able to build, filter, verify and monitor a simple BGP setup before it is connected to a public network.
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The RouterKit mission is to provide a plattform to deploy software defined routers and firewalls. This goal is supported by providing…
passt implements a translation layer between a Layer-2 network interface and native Layer-4 sockets (TCP, UDP, ICMP/ICMPv6 echo) on a host. It doesn't require any capabilities or privileges, and it can be used as a simple replacement for Slirp.
This guide demonstrates the most common aspects of libvirt networking, whether running virtual machines (VMs) on a dedicated server or within a home lab.
How to choose a network type
On a dedicated server — where VMs often need to be publicly accessible — a Bridged network is ideal and allows each VM to bind to its own public IPv4 and IPv6 addresses. If bridging is not possible, create a Routed network. If the server has limited public IPv4 addresses, a NAT-based network that forwards incoming connections may be the only option.
Inside an intranet or home lab, a NAT-based network gives VMs outbound network access. If VMs are running services that must be accessible from other systems on the LAN, create a Bridged network (for an Ethernet connected libvirt host) or a Routed network (for a wirelessly connected libvirt host).
If you want to prevent libvirt from automatically inserting iptables rules, create a Bridged network, Custom routed network, or Custom NAT-based network.
Contents
Podman uses two different means for its networking stack, depending on whether the container is rootless or rootfull. When rootfull, defined as being run by the root (or equivalent) user, Podman primarily relies on the containernetworking plugins project. When rootless, defined as being run by a regular user, Podman uses the slirp4netns project.
#Networking and Podman pods
By definition, all containers in a Podman pod share the same network namespace. This fact means that they will have the same IP address, MAC addresses, and port mappings. You can conveniently communicate between containers in a pod by using localhost.
It seems once people master the basics of containers, networking is one of the first aspects they begin experimenting with. And regarding networking, it takes very little experimentation before ending up on the deep end of the pool. The following guide shows the most common network setups for Podman rootful and rootless containers. Each setup is supported with an example.
Kea is open source, shared under MPL2.0 licensing. Kea is developed in the open on ISC’s GitLab; we welcome you to open issues and submit patches there. Kea runs on most Linux and Unix platforms, as well as MacOS. If you don’t want to build from our source distribution, we also provide a repository of pre-built packages for most popular operating systems.
ISC distributes and maintains TWO open source, standards-based DHCP server distributions: Kea DHCP and ISC DHCP. Kea includes all the most-requested features, is far newer, and is designed for a more modern network environment.
How is the Kea DHCP server different from the older ISC DHCP?
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Modular Component Design, Extensible with Hooks Modules. The Kea distribution includes separate daemons for a DHCPv4 server, a DHCPv6 server, and a dynamic DNS (DDNS) module. Many optional features are enabled with dynamically-loaded “Hooks Modules,” which you need run only if you are using them. You can write your own hooks modules (in C++) or try some of the hooks we offer.
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On-line Re-configuration with REST API Kea uses a JSON configuration file that can be modified remotely via set commands and reloaded without stopping and restarting the server, an operation that could take quite a while with ISC DHCP.
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Designed to Integrate with Your Existing Systems. Kea allows you to separate the data from the execution environment, enabling new deployment options. Your network data - leases, host reservation definitions, and most configuration data - can be located separately from the DHCP server itself, using a Kea “backend.”
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Web-based graphical dashboard Kea now has a graphical dashboard for monitoring multiple Kea servers. This system, called Stork, uses agents deployed on the Kea servers to relay information to a centralized management platform, providing the administrator with an easy-to-use quick view of system status and activity.
Kea supports two database backends; MySQL and PostgreSQL. Choose to store leases, host reservations, or shared configuration data in a separate database backend. Benefits of this include:
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Integrate it more easily with your other systems - provisioning systems, IPAMS and so on - by storing critical data in a separate database.
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Use the same hosts reservations backend for multiple DHCP servers.
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Administer global options from a centralized configuration backend.
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Manage large address pools in a database rather than a text file.
The ActivityPub protocol is a decentralized social networking protocol based upon the [ActivityStreams] 2.0 data format. It provides a client to server API for creating, updating and deleting content, as well as a federated server to server API for delivering notifications and content.
Pleroma is a free, federated social networking server built on open protocols. It is compatible with GNU Social, Mastodon, and many other ActivityPub and OStatus implementations.
The project consists of several components: Pleroma is the server implementation, and comes bundled with PleromaFE, the default frontend. Other useful utilities are also provided, such as an ActivityPub relay.
Romana is a network and security automation solution for cloud native applications. Romana automates the creation of isolated cloud native networks, secures applications using microsegmentation and enforces access control policies on all endpoints, wherever they run.
Romana is network agnostic and secures applications using standard networking techniques so they can be deployed easily on public and private clouds, and even across the Internet.
Applications that run with Romana are easier to operate and deliver higher performance than when using a virtual network overlay. With Romana, an overlay is never required, even across availability zone boundaries. Romana’s innovative approach enables seamless hybrid cloud deployment and lets container orchestration systems transparently scale capacity across private and public clouds worldwide.
Integration with Kubernetes and other cloud orchestration systems lets application developers use their existing tools and workflow to secure their applications with the deployment flexibility they need.
Romana is all open source and is deployed successfully today on servers running thousands of container workloads by operators of some of the largest on-line applications. Romana lets you deploy cloud native applications securely on isolated networks with policy based control. Romana runs in any IaaS, so developers running Kubernetes in a public cloud now have a way to apply network and security policies to all pod communications.
Traditional SDNs are complex, making them hard to deploy and troubleshoot. Calico removes that complexity, with a simplified networking model designed for the demands of today's cloud-native applications.
Unlike SDNs that require a central controller, limiting scalability, Calico is built on a fully distributed, scale-out architecture. So it scales smoothly from a single developer laptop to large enterprise deployments.
Defining secure network policy used to be reserved for skilled network engineers. Calico's powerful micro-segmentation capabilities build on a simple policy language that naturally expresses the developer's intent.
Weave Net - Weaving Containers into Applications
Weave Net creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery. With Weave Net, portable microservices-based applications consisting of multiple containers can run anywhere: on one host, multiple hosts or even across cloud providers and data centers. Applications use the network just as if the containers were all plugged into the same network switch, without having to configure port mappings, ambassadors or links.
Services provided by application containers on the weave network can be exposed to the outside world, regardless of where they are running. Similarly, existing internal systems can be opened to accept connections from application containers irrespective of their location.
On layer 2 networks, high availability can be achieved by:
- antique protocols, like the Spanning Tree Protocol,
- proprietary protocols, like Juniper’s virtual chassis, Cisco’s virtual port channel and other MC-LAG implementations,1
- standardized protocols, like Shortest Path Bridging Protocol or TRILL, or
- the underlying network (in the case of an overlay network, like VXLAN).
FRRouting (FRR) is an IP routing protocol suite for Linux and Unix platforms which
includes protocol daemons for BGP, IS-IS, LDP, OSPF, PIM, and RIP.
FRR’s seamless integration with the native Linux/Unix IP networking stacks
makes it applicable to a wide variety of use cases including connecting
hosts/VMs/containers to the network, advertising network services, LAN
switching and routing, Internet access routers, and Internet peering.
FRR has its roots in the Quagga project. In fact, it was started by many
long-time Quagga developers who combined their efforts to improve on
Quagga's well-established foundation in order to create the best routing
protocol stack available. We invite you to participate in the FRRouting
community and help shape the future of networking.
Join the ranks of network architects using FRR for ISPs, SaaS infrastructure,
web 2.0 businesses, hyperscale services, and Fortune 500 private clouds.
In data center topologies, right cabling is a time-consuming endeavor and is error prone. Prescriptive Topology Manager (PTM) is a dynamic cabling verification tool to help detect and eliminate such errors. It takes a graphviz-DOT specified network cabling plan (something many operators already generate), stored in a topology.dot file, and couples it with runtime information derived from LLDP to verify that the cabling matches the specification. The check is performed on every link transition on each node in the network. It also detects forwarding path failures using Bidirectional Forwarding Detection (BFD).
You can customize the topology.dot file to control ptmd at both the global/network level and the node/port level.
PTM runs as a daemon, named ptmd.
Envoy is an L7 proxy and communication bus designed for large modern service oriented architectures. The project was born out of the belief that:
The network should be transparent to applications. When network and application problems do occur it should be easy to determine the source of the problem.The BIRD project aims to develop a fully functional dynamic IP routing daemon primarily targeted on (but not limited to) Linux, FreeBSD and other UNIX-like systems and distributed under the GNU General Public License.