Why use ufw if the ports are closed by default
Aviv Lo asked: My question is why use a firewall like ufw if most of the ports are closed by default and the open ones are mean to be accessed. …
Undo'ing some network setups including 'promisc' mode
darune asked: Suppose I have the following script, roughly it sets up promisc mode and setup a bridge between the two networks (acting as a routing point on the mac …
Filter to only pass specific headers by Nginx reverse proxy
Vincent-cm asked: For example here is a list of headers set by the frontend project and send all by default * accept: application/json * accept-encoding: gzip, deflate, br * accept-language: …
How to interpret CPU utilisation on KVM guest / host
dsl101 asked: I have a host Ubuntu 18.04 64-bit os running on a 24-core Xeon system. I’ve allocated 2 vCPUs to the guest which is Ubuntu 18.04 32-bit, and it’s …
Custom service filling up syslog
transient_loop asked: We have a custom service we start via systemd. File is stored at /etc/systemd/system/custom.service. That’s all great but we just had a situation where the disk ran full. …
IPTables source NAT (SNAT) to /etc/ufw/before.rules
Tim asked: I have a need to source NAT (SNAT) traffic between two interfaces in an Ubuntu 18.04 server. I’ve been trying to use the ‘/etc/ufw/before.rules’ file to implement my …
Ubuntu 18.04: Communication to server on localhost stops working after setting a port forwarding rule
muliku asked: I have a Ubuntu 18.04 device with two network interfaces, ethernet and USB LTE modem. There is IP camera connected directly to the ethernet port and it has …
Problems with improper vhosts configuration on Apache 2 / Ubuntu 14.04
mheavers asked: I have various subdomains set up successfully as virtual hosts on my Digital Ocean Droplet. For some reason though, my latest subdomain is serving a different subdomain, and …
Unable to configure IPv6 correctly in Ubuntu 18.04
joshsharp asked: I have a cloud instance on OVH which is accessible over IPv4 but not IPv6. It’s running Ubuntu 18.04. I’ve found conflicting advice about using netplan vs configuring …
How can I setup NAT on my OpenVPN Server for the client?
Mohi asked: I have created a VM instance in Oracle Cloud to use as my OpenVPN server. I am able to connect my client (Android phone) with the server but …