Networks – IT Blog

How to add static routes in Windows

Let’s say we have a network with the following data:

NAT Modules for VPN, FTP, SIP

Let’s say SNAT or masquerading is configured on a Linux server, for example, as I described in article Ubuntu IP Masquerading (NAT). But if many NAT clients connect to external PPTP, FTP, SIP servers for NAT, then they will have connection problems.

Installing and using ipt_NETFLOW

ipt_NETFLOW – fast NetFlow traffic sensor, consists of a kernel module and iptables, supports NetFlow v5, v9, v10(IPFIX).

Installing and using Nfsen

Nfsen is an open-source Netflow collector and analyzer that displays statistics in a web interface in the form of graphs.

Installing and using Nfdump

Nfdump is a collection of tools for collecting and processing netflow data.

Installing and configuring PPTPd server

Below I will describe how pptpd is installed and configured. On the test I will install in Ubuntu Server 18.04.

Installing and configuring fprobe

On the test, I will install the fprobe sensor, which will collect statistics from network interfaces and transmit it to the collector.

Installing and using Speedtest CLI

In this article, I will give an example of installing and running the Speedtest CLI.

Solution for Speedtest CLI error “Failed to find a working test server”

Once, when running the Speedtest CLI on one Linux server, I noticed the following error:

Installing and updating the ixgbe driver

I will give an example of installing or updating ixgbe drivers on Linux.