A systems administrator needs to reconfigure a Linux server to allow persistent IPv4 packet forwarding. Which of the following commands is the correct way to accomplish this task?

The correct answer is B. sysctl -w net.ipv4.ip_forward=1. The command sysctl -w net.ipv4.ip_forward=1 enables IPv4 packet forwarding temporarily by setting the kernel parameter net.ipv4.ip_forward to 1. To make this change persistent, the administrator needs to edit the file /etc/sysctl.conf and add the line net.ipv4.ip_forward = 1.

System Management

Question

Options

Aecho 1 > /proc/sys/net/ipv4/ipv_forward
Bsysctl -w net.ipv4.ip_forward=1
Cfirewall-cmd --enable ipv4_forwarding
Dsystemctl start ipv4_forwarding

How the community answered

(33 responses)

A
3% (1)
B
91% (30)
D
6% (2)

Explanation

The command sysctl -w net.ipv4.ip_forward=1 enables IPv4 packet forwarding temporarily by setting the kernel parameter net.ipv4.ip_forward to 1. To make this change persistent, the administrator needs to edit the file /etc/sysctl.conf and add the line net.ipv4.ip_forward = 1.

Topics

#Linux Networking#Kernel Parameters#System Configuration#sysctl

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