Category Archives: Networks

Monitoring current RX and TX network interface buffers in Zabbix

One day after restarting the Ubuntu server, due to the long start of a large number of network interfaces, my script which increased the values of the buffers and also performed other settings was performed ahead of time, respectively, the changes did not apply and I found out about this problem only after 24 hours, so I decided monitor current RX and TX buffers.

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Why service networking restart or /etc/init.d/networking restart does not work

For example, take the server with the operating system Ubuntu Server 14.04, in which let’s say we changed the network settings when executing the commands:

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Difference between MASQUERADE and SNAT

In this article I will briefly describe the difference between MASQUERADE and SNAT.

MASQUERADE. Less fast routing than SNAT with mass requests, since for each new connection an IP address on the external network interface (WAN) is determined. Great for home use routers and when changing the IP address on the WAN interface.
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PPS Viewer Script (Packets Per Second)

The script every second displays the number of incoming and outgoing packets per second on the specified network interface.
Place the contents of the script into a file, for example, pps.sh and execute by specifying the name of the network interface (you can stop the execution of the script with CTRL+C):

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