Questions tagged [subnet]
26 questions
7
votes
2 answers
Installation of server does not accept subnet CIDR
I try to install a server from scratch with a fixed IP address. For installation I use the provided ISO of 18.04.3 and the installation agent of Ubuntu.
First I thought that my understanding of the subnet CIDR was wrong, but after I received…
Marged
- 173
3
votes
0 answers
How to SSH between Client and Host on Different Subnets, Same Network?
On Home Network with two subnets:
Client IP is 192.168.1.41 (Router subnet, netmask 255.255.255.0),
SSHServer IP is 192.168.0.3 (Modem subnet, netmask 255.255.255.0).
If I try to SSH from Client to SSHServer, it times out. Yet, there is no…
jtd
- 2,385
3
votes
3 answers
Connect to connected OpenVPN client from different subnet
I have a machine running Xubuntu 17.04 that is connected as a client to a VPN via OpenVPN (2.3.11). When I have the client connected, I can access the machine remotely via SSH and VNC if I am on the same subnet (my LAN subnet, 192.168.1.0/24). I can…
3
votes
1 answer
Ubuntu Server Netplan - conflicting default route declarations for IPv4 - 4 different /24s on each port
I have a server with 2 network cards of 4 ports, but only one of them is used. Each port is connected to a L2 switch and configured for a different VLAN with 1 usable IP from a different /24 subnet - each with different default gateway. Only 1 of…
lion
- 91
3
votes
1 answer
ubuntu server not accepting connections from subnets
Yesterday I rebooted our kvm server (added more rams) and now it will not accept connections from our VPN subnet. The VPN is working just fine as we can connect to any other resource on the network with it, we can even ssh into other servers and…
John Colombo
- 33
2
votes
1 answer
LXD Bridge Prevents Network Access
Explanation before the question
I am trying to configure LXD on a raspberry pi using Ubuntu Core 20.04. It's local IP is initialized as 192.168.2.64. Before I run lxd init it was connecting to network without problem. Towards the configuration…
FFaFafy
- 53
- 5
2
votes
1 answer
How to manually specify document scanner IP address
Recently fresh/clean installed from 16.04 (to 20.04), where I was able to use the document scanner app to drive my Brother document scanner.
I'm trying to use the (Gnome) Document Scanner app on 20.04 and it's saying "No scanners detected".
This is…
pleasedesktop
- 1,251
2
votes
1 answer
Why does the Ubuntu Server installer ask for both a subnet and IP address?
When installing a new Ubuntu server instance, the installer asks for a subnet in CIDR notation and then it asks for an IP address without CIDR notation.
Why can't I just specify the IP address in CIDR notation? Wouldn't that include all of the…
Izzo
- 71
1
vote
1 answer
Configuration of ufw for one user. Noob
I have several sudo users on Ubuntu 16 PC. ufw is disabled on this PC now. I need to switch ufw on for sudouser1. I need to make following config:
1) allow all and any incoming and outgoing connections only from subnet (for example 123.44..) but for…
zlon
- 229
1
vote
0 answers
Improve speed of "sshuttle" with multiple connections?
In the sshuttle documentation: "It’s valid to run sshuttle more than once simultaneously on a single client machine, connecting to a different server every time, so you can be on more than one VPN at once."
That sounded great because sshuttle is…
Jay Brunet
- 1,403
1
vote
0 answers
Second Network Interface in Subnet of default route
I've got a 16.04 server with interface em1 in my companys a.b.0.0/16 subnet AB. For reasons reasons I can't change, there is a protected subsubnet ABC within this range called a.b.c.0/24 which I only can reach by adding a second network interface…
Harry
- 111
1
vote
1 answer
How can I dynamically determine the IP mask to use for dynamic ranges?
I have a list of ranges for IP addresses that I want to block, the ranges are like 210.80.32.0 to 210.80.63.255
How can I dynamically determine the right 210.80.32.0/NUMBER to capture the full range?
sudo ufw deny 210.80.32.0/???
I am reading…
JoGotta
- 13
1
vote
0 answers
Netplan with Two Gateway Subnets on Same Port
Trying to configure an Ubuntu 18.04 machine with two IP addresses on different subnets on one ethernet port, each with a gateway so port forwarding works from different routers.
This was based on the Netplan documentation. The two IPs work, but no…
Oscar M
- 11
1
vote
0 answers
How To Add Docker Container Static Route?
Have a server with 4 subnets - 1 usable IP, each configured on separate network port on the network card. Running 4 docker containers, but they are randomly accessible upon reboot. How to add a static route for each?
container1 - network card port1…
lion
- 91
1
vote
1 answer
Ubuntu Router with different LAN subnets
I have an ubuntu 18.04 router with several LAN interfaces:
1st interface: 2 port 10G NIC (the interfaces are bonded/teamed)
bond1:
interfaces: [enp5s0f0, enp5s0f1]
2nd interface: 4 port NIC
enp8s0f0, enp8s0f1, enp9s0f0,…
P. Gupta
- 21