Questions tagged [linux-networking]

Linux Networking refers to any networking function performed by a server running Linux. A Linux server operating as a router or firewall are the most common applications.

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Rule for policy based routing not applying

My ISP doesn't give me a static public IP, so I've setup an openvpn connection to get one on my homeserver, and that is working fine for services running directly there. I'd also like to have a few ...
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21 views

Drupel 9, GD not enabled

I have for hours been attempting to set up a Drupel database, but have been stumped on this error message: "PHP extensions Disabled Drupal requires you to enable the PHP extensions in the ...
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Samba Network drive files corrupted

I have samba network share configured on AmazonLinux, With S3 as a backend storage for the drive, Samba drive path For ex: 192.0.0.1\Share\ (Path inside server /samba) S3 Bucket mount path (/samba/...
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25 views

ping: example.org: No address associated with hostname

I am facing a problem I cannot explain: If I do ping example.org I am getting the result ping: example.org: No address associated with hostname dig returns an empty result: dig example.org ; <&...
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Routing traffic from a bridge interface (with IP assigned) to another network on a different local interface

I'm on Ubuntu 20.04 and am running virtual machines (KVM) locally that are attached to a bridge interface on the host. The bridge (and all VMs attached to it) are getting their IPs via DHCP from a DSL/...
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High average load + low cpu usage + low disk usage + normal network usage + normal memory usage = ok or not?

I see high CPU average load several times a day on my server. For example, 21:20 and 22:45 on the following figure: However, my CPU, disk, and network are all OK: Disk Network CPU Memory Also do ...
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34 views

NetworkManager isn't starting dnsmasq on restart, only reload

I've configured NetworkManager on CentOS 7.9 running in Azure to use dnsmasq. Everything is working pretty much fine, except when the server is rebooted (or NetworkManager is restarted) dnsmasq doesn'...
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172 views

systemd's “predictable interface names” not being predictable

I'm running Debian Testing (kernel 5.10.0-2-amd64 / systemd 247.2-5) on a Mac Pro as a NAS / VM host. Today, I added a Thunderbolt 3 card (Gigabyte Titan Ridge) - and noticed something strange: the ...
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Connecting DHCP embedded device to Windows 10 PC using Ethernet cable

I have a custom embedded Linux device that I need to connect to using SSH for work. This device uses DHCP to get its own IP from the network (using an Ethernet cable). I used to use a router in ...
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26 views

Per-user routing of incoming(!) and outgoing traffic

The outgoing traffic of user1234 on the client should run via the tunnel and be NAT'ed to 2.3.4.5. On the opposite direction a certain port range on that IP should be forwarded back through the tunnel ...
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network configuration on debian 10.8 [migrated]

Ive installed a fresh debian buster on a local pc, at home with dynamic IP, static DHCP allocation from router to 192.168.1.190, port forwarding to 192.168.1.190 port 22,80,8080, router IP is 192.168....
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29 views

Linux internet default gateway + VPN default gateway

I'm currently using a barracuda vpn client to connect to a vpn, which sets a default gateway for the vpn, routing all traffic through it. I've read about iproute2 and secondary routing tables, but my ...
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30 views

Does DPDK/RDMA between 2 machines gives lower latency than local host ping

I know loopback will go through the kernel network stack until reach IP layer, including syscall overhead and some memory copy overhead. DPDK and RDMA use different technology to avoid these. So let'...
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29 views

Exclude remote syslog client logs from /var/log/syslog on host machine

Background: I have a lil Raspberry Pi server running the latest Raspbian OS running a number of network appliances to help manage a complex IOT LAN for a client. I have been using rsyslog to write ...
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25 views

Two interfaces on the same network for redundancy

Is it possible in linux to use two physical network interfaces on the same local network for redundancy reasons? So if one cable or one interface gets broken everything still keeps working. What is ...

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