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).
156
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OSPF loopback route learned not installed in forwarding table in FRR [closed]
This should be a REALLY, REALLY simple OSPF config. I have 2 VM running FRR that I would like to announce their /32 loopback address between each other. The config is as below:
ip forwarding
ipv6 ...
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2
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62
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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 ...
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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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118
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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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46
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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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43
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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 ...
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45
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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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70
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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 ...
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879
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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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422
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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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688
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Bash script to gather serial numbers from list of cisco switches
I have pieced together a script to login to each switch listed in the file switch.txt, grab the serial number and place it with the IP address into the CSV serials.csv. The problem I am having is that ...
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437
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Inconsistent behavior of link aggregation
I'm testing bandwidth between two switches and I noticed link aggregation behaves inconsistently between test runs. I'm testing with a single instance of iperf with 2 streams. Sometimes the load is ...
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149
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Will the UDP packets reach its destination?
I am trying to send UDP Packets using Linux Socket.
Working inside a Linux VM.
Server IP = 172.16.x.x
Client IP = 172.21.x.x
Both are connected via a Ethernet switch.
Doing a broadcast on company's ...
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