Make an IP alias reservation.
gcloud compute instances network-interfaces update instance-name \ --zone us-central1-c \ --aliases default:/32 \ --project project-id |
GCP Reserve Alias IP
network
GCP Add New Route
Here’s how to add a new route in Google Cloud Platform.
gcloud compute routes create name-of-new-route \ --destination-range=200.20.0.0/15 \ --next-hop-gateway=default-internet-gateway \ --project=host-project \ --network="default" \ --priority=900 |
AWS Enable Enhance Network Support
When changing machine types, you may be asked to enable the latest ENA driver for Enhanced Network Support on an Amazon EC2 instance. There are several instructions depending on the Linux OS flavor. Here are the instructions to enable. In some cases, you may need to rebuild the kernel module. To verify that the ena module is installed, use the modinfo command as shown in the following example.
modinfo ena |
You also may have to enable the enhanced networking attribute on the instance.
aws ec2 modify-instance-attribute --instance-id instance_id --ena-support |
Nmap
Here’s how to list all the devices on your network using nmap.
nmap -sn 192.168.0.0/24 |
If nmap is not installed, install it.
yum install nmap apt install nmap |
Netstat
Netstat is a utility for gathering network statistics. It comes preinstalled on most systems.
If missing, here’s how to install.
# Redhat, CentOS yum install net-tools # Debian, Ubuntu, Mint apt install net-tools # SLES, SUSE zypper install net-tools |
Here are some common and useful commands.
# show version netstat -v # show routing table netstat -nr # show network interface statistics netstat -ai # show network connections netstat -ant # show network services netstat -pnltu |