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DNS Resolution Configuration Transition In Debian GNU/Linux, systemd-resolved provides a local DNS caching stub listener. By default, this configuration often relies on a symbolic link from /etc/resolv.conf to /run/systemd/resolve/stub-resolv.conf to ensure the system uses the local stub listener for name resolution. When moving from this managed state to a
I have a Wireguard server on my home network which works fine on all my devices, including my phone when it's connected on Wi-Fi. The problem comes when I disconnect from the Wi-Fi and go on 4G, now my phone is unable to complete the handshake with my server. On my router, I have UDP port 51820 forwarded to my Wireguard server. On my phone, I connect to the
The ss command seems to distinguish between * and 0.0.0.0 . While the listing of ssh with 0.0.0.0:22 and [::]:22 is clear, *:7946 and *:80 is not quite as much. $ ss -ntl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 0.0.0.0:22 0.0.0.0:* LISTEN 0 128 *:7946 *:* LISTEN 0 128 *:80 *:* LISTEN 0 128 [::]:22 [::]:* Why isn't it 0.0.0.0:794
We have implemented a new firewall. My clients (Windows 10/11) and servers (Windows Server 2012R2) are randomly disconnecting from internet. If I do an arp -d , then my gateway (10.0.0.1) MAC is ac-xx-xx-xx-xx-81 and I can't access the internet - I get a Reply from 10.0.0.1: Destination net unreachable. . After like 10 seconds I get internet back and everyti
I'd like to add a secondary backup internet connection to my Linux server. I plan to use a USB LTE modem for this purpose. Because this cellular connection will be metered, I want to limit the amount of data that can be consumed to the absolute minimum necessary. I have a custom server application that I can make any changes to. It has a few tasks where unin
Network Configuration Safety Mechanism Ubuntu uses Netplan as a declarative abstraction layer to manage network settings via backend renderers such as systemd-networkd or NetworkManager. To prevent permanent loss of connectivity during remote configuration changes, the netplan try command implements a timeout-based rollback mechanism. Configuration Uncertain
According to https://lwn.net/Articles/629155/ the Linux kernel, "can only forward something between 1M and 2M packets per core every second" - but how good Linux is at scaling across dozens of cores then? Say I have a multiqueue(128 rx+tx pairs) 100gbps NIC on multicore CPU - will Linux be able to saturate 100gbps NIC i.e. scale "between 1M and 2M packets pe
answered · 01 May 2020, 13:35 UTC
debian
linux
ssh