Questions tagged [linux]
For questions about or involving the open-source operating system modelled on UNIX. Use this tag only when your question is about Linux on on-topic devices (business grade and with optional, paid vendor support).
159 questions
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ping fails after setting monitor to capture traffic for ad hoc (IBSS) [closed]
Can anyone help me to troubleshoot a problem that I face during my lab in university. The task asks to deploy an IBSS and analyze the data, control, and management traffic for that network.
The ...
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Dell Switch OS does not allow any interface commands
I have recently been tasked to operate a Dell switch and I have to shut down an interface connected to a server.
But the switch OS that it has doesn't allow me to enable/disable the switch ports.
SW1(...
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help with consumer grade routing [closed]
Trying to understand why I cannot reach other LAN devices on a ISP modem.
I have one ISP modem at 192.168.1.1. Already triple checked there is no option for client isolation or the likes.
then on one ...
- 133
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How can I determine whether requests to my web server are coming from hosts directly connected to the switch or from neighboring switches?
I have a Linux host connected to a layer 2 switch where I’ve set up a web server using Laravel. On this web server, I need to identify the source of incoming requests: whether the requester is ...
- 165
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Missing ICMP identifier equivalent in ARP protocol and desired arping behavior
Running simultaneously more arping on the same interface and the destination IP address all clients get the responses due missing ICMP identifier equivalent.
First, am I correct that there is no ICMP ...
- 147
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What is generating the /isan/etc/dcos_sshd_config file?
I posted this on the main stack overflow page, but then I remembered that this niche existed. Figured it was worth a cross-post...
During a recent Nessus security scan at work, some of our NX-OS ...
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iperf3 download and upload test simultaniously giving abnormal results
I have a server (Lenovo using Ubuntu) and 2 clients (both Mac). The server is connected with a Wi-Fi router over Eth interface. The two clients are connected with Wi-Fi router over WLAN interface. All ...
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Is it possible that not adhering to a standard color coding in ethernet cables would affect performances?
I have two gigabit devices connected to a gigabit switch using cat 5e ethernet cables, but the wirings on the RJ45 connectors do not respect any of the established color standards, because they were ...
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IPSec Site to Site VPN Connected but Subnets not Routing [closed]
Re: Creating a site to site vpn from ubuntu 22 + strongswan to cisco meraki
Issue: I've established a vpn tunnel but routing between clients on the network is not working.
meraki config:
Non-Meraki ...
- 111
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Scenarios in which a host (e.g. Debian) would update its ARP table [closed]
For security reasons, I'd like to know for which of the following scenarios would a host (Debian for example) update its ARP table:
It receives a gratuitous ARP for IPs that are not in its ARP table
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What is the name of the syntax for the "configure" interface?
When accessing routers/switches via ssh cli, I'm familiar with configure syntax but have never bothered to ask "what is it called?" As you might imagine, searches for router configure ...
- 119
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74
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Multi-route mobile networking - can wireguard solve this problem? [closed]
I have a fleet of vehicles which will have Linux-based routers, with multiple upstream routes. These routes work intermittently due to coverage of different technologies.
Can I use Wireguard to make ...
- 113
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121
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Allow active connections in firewall on multiple BGP connected routers
We have a network on its own AS with 2 routers connected to 2 AS via BGP (full routes).
The routers also both have a firewall on board that by default drops all traffic, except the one allowed. We ...
- 103
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Why Linux answers ARP requests for IPs that belong to different network interfaces? [closed]
My machine has a physical network interface (eno1) and a bunch of virtual network interfaces (e.g. tap0). Each interface has its own IP and their subnets do not overlap.
I noticed that if I perform an ...
- 103
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Multiple GRE tunnels towards single host using anycast IP
I'm trying to build the following network architecture:
Where clients try to connect to a backend server (e.g. SSH) by using a Public Anycast IP adddress (1.2.3.4), that routes the client to the ...
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