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Building on the Systems Approach that we adopted for our original Computer Networks text book, we are writing a series of "micro-books" that apply the systems lens to emerging topics.
Series of CC-licensed booklets about computer networking tooics.
This program receives flows (currently Netflow/IPFIX and sFlow), hydrates them with interface names (using SNMP), geo information (using MaxMind), and exports them to Kafka, then ClickHouse. It also exposes a web interface to browse the collected data.
OpenBSD tool, forward unused ports, people running portscans that connect to any of the ports will be added to a pf table
tftp2httpd is a daemon written in Go which acts as a TFTP server and proxies the requests to an HTTP server. This can be used to serve configuration files requested by embedded devices on a dynamic basis, by taking advantage of the huge HTTP ecosystem for serving requests dynamically.
this is the first post on a series of automation posts that will demonstrate how to build a Full-Stack automation. In fact it can be used to automate any service, but we'll focus and use network as an example.
via Ivan Pepelniak
On September 30th 2021, Slack had an outage that impacted less than 1% of our online user base, and lasted for 24 hours. This outage was the result of our attempt to enable DNSSEC — an extension intended to secure the DNS protocol, required for FedRAMP Moderate — but which ultimately led to a series of …
Apache Traffic Server™ software is a fast, scalable and extensible HTTP/1.1 and HTTP/2 compliant caching proxy server. Formerly a commercial product, Yahoo! donated it to the Apache Foundation, and currently used by several major CDNs and content owners.
This post explains why you should always set ARP timeout to less than 5 minutes in L3 EVPN, and always be cautious of potential ARP suppression issues in L2 EVPN.
[..] in my opinion, ARP timeout < MAC age timer should be best practice in all EVPN deployments.
Test traffic generator for continuous traffic.
This is the router lab the DE-CIX Academy uses for their BGP seminar "BGP for networks who peer".
It contains of a few docker images plus one subdirectory for each experiment the students use during the seminar.
A terminal UI for tshark, inspired by Wireshark (written in golang). Supports Wireshark display filters and live capturing.
Database and Guides to configuration Open-Source Friendly switches, routers and firewalls
EtherDFS is an 'installable filesystem' TSR for DOS. It maps a drive from a remote computer to a local drive letter, using raw ethernet frames to communicate.
I've designed an adapter to use HPE FlexibleLOM NICs in normal full height PCIe slots. 10Gb/s SFTP+ethernet FlexibleLOM cards cost just $5, dual 40Gb/s QSFP+ cards only $10.
experiments with a userspace driver that transports IP (over SCSI) over FC