urn:uuid:56d4048f-1bd7-558c-b11f-7d3358301e34 Topic: Networking – Ctrl blog Daniel Aleksandersen https://www.daniel.priv.no/ Copyright © 2021 Daniel Aleksandersen. https://www.ctrl.blog/assets/favicon/favicon.svg 2021-07-11T01:09:00Z weekly 10 urn:uuid:075bba76-530e-4577-998f-1a0e218c76da 2021-07-11T01:09:00Z 2021-07-11T01:09:00Z Nothing but bad experiences with Realtek Ethernet NICs Nothing but bad experiences with Realtek Ethernet <abbr title="network interface controller">NICs</abbr> The tale of my bad experiences with consumer-grade Realtek networking equipment over the last decade. Intel has always had to come in to save the day. <p>I recently got a new Asus AMD B550-PLUS (on Amazon) mainboard. It has a built-in Realtek PCIe 2,5-gigabit (RTL8125B) network interface controllers (NIC.) As is often the case with Realtek NICs, it has been quite unreliable and is plagued with intermittent issues.</p> <p><a href="https://www.ctrl.blog/entry/realtek-nic.html#src=feed">Read more …</a></p> urn:uuid:5d3ddbad-63cd-4b48-9b9c-1e64cd21d5c6 2021-05-25T12:54:00Z 2021-05-25T12:54:00Z How I fixed the intermittent Wi-Fi dropouts on my MacBook The Wi-Fi on my MacBook Pro has intermittently stopped working. (Likely a Broadcom driver issue.) Here’s how I turned a simple workaround into a more permanent fix. <p>The Wi-Fi on my MacBook Pro (a late-2013, 39 cm model, MacBookPro11,2) randomly stops working. It doesn’t lose the connection, and Wi-Fi Diagnostics can’t find anything wrong. The networking just stops working. Here's how I found out what was wrong, how you can find out if you’re having the same problem, and how I found a fix.</p> <p><a href="https://www.ctrl.blog/entry/macbook-wifi-dropouts.html#src=feed">Read more …</a></p> urn:uuid:c3b95eae-b275-45dd-a13c-6314016017f1 2021-03-10T18:08:00Z 2021-03-10T18:08:00Z Jellyfin and metadata privacy The Jellyfin media server can enrich your media collection with metadata from online sources. The price may be free, but the cost is metadata for metadata. <p>I recently migrated my home media server to Jellyfin. One of the advantages of using it is that it can supplement your (mainstream) media collection with poster graphics and rich metadata pulled in from sources like The Movie Database (TMDb) and TheTVDB. As with everything that talks to someone else’s servers, this feature comes at a cost to privacy.</p> <p><a href="https://www.ctrl.blog/entry/jellyfin-metadata-proxy.html#src=feed">Read more …</a></p> urn:uuid:bbf047a2-7c3a-49af-b794-db70a04d186e 2021-02-12T20:02:00Z 2021-02-12T20:02:00Z systemd application firewalls by example <code translate="no">systemd</code> application firewalls by example How to restrict Linux services’ network traffic with per-service systemd firewall rules. Enhance security by only allowing required network access. <p>An application firewall, unlike a gateway (router) or system level firewall, is meant to limit the networking of a single application. It can be used to prevent a compromised service from seeing into the local network, prevent programs from calling home, plug metadata leaks, or more tightly control a program’s network access.</p> <p><a href="https://www.ctrl.blog/entry/systemd-application-firewall.html#src=feed">Read more …</a></p> urn:uuid:2254757c-fd79-4119-b6a2-3e9036431bc7 2021-02-10T13:15:00Z 2021-02-10T13:15:00Z Don’t use RouterOS DHCP lease scripts to manage DNS MikroTik’s DHCP lease scripts don’t execute on DHCP renewals, causing issues with DNS registrations when devices suspend and rejoin the network later. <p>The RouterOS DHCP Server (MRDS) from MikroTik doesn’t natively support registering hostnames from DHCP leases to its DNS server. Instead, it supports executing a “DHCP lease script” when new leases are issued, released, or expires. You can use a lease script to manage DNS entries for DHCP leases. However, this isn’t the best solution for managing static DNS registrations for your network hosts.</p> <p><a href="https://www.ctrl.blog/entry/routeros-dhcp-lease-script.html#src=feed">Read more …</a></p>