Iptables on Technical Notes

Home PBX

Sat, 13 Jul 2024 00:00:00 +0000

Asterisk is a free software program (under GPL license) that provides PBX (Private Branch Exchange) functionality. You can connect phones to make calls between them within your home (or office) and even access external communications, to the PSTN (like Movistar) or by connecting to a VoIP provider or ISDN links (basic or primary).

Ethernet Bridge

Sun, 19 Oct 2014 00:00:00 +0000

Proof of concept to extend my home network to a remote site through the internet, from where I could consume Movistar’s IPTV services. I used a pair of Raspberry Pi 2s, connected to each other by a pair of IPSec tunnels.

This post is related to Linux Router for Movistar and video on demand with Fullcone NAT on Linux.

Video on Demand for Movistar

Sat, 18 Oct 2014 00:00:00 +0000

The IPTV video streams used by Movistar come in two types: regular channels (Multicast/UDP) and video on demand (Unicast/UDP). In this post I describe what needs to be done on the Linux router for Movistar to make “Video on Demand” work. They use the RTSP protocol which requires our router to support Full Cone NAT.

The set-top boxes request videos via RTSP from their control server, but the video is sent from a different server with an unknown IP, so if we do nothing the video traffic will be dropped. Let’s see how to solve this.

Linux Router for Movistar

Sun, 05 Oct 2014 00:00:00 +0000

This post describes what’s behind (at a technical level) the IP service offered by Movistar Fusion FTTH (Fiber) and how to replace the router they install with a GNU/Linux-based machine that will act as a Router (along with an Ethernet Switch) to provide the same Data, Television (IPTV), and Voice (VoIP) services.

After reading this post, I recommend continuing with video on demand for Movistar and the lab to extend your local network to a remote site with an Ethernet Bridge.

IPtables with nflog

Sun, 31 Aug 2014 00:00:00 +0000

Geek quote: “Logging what happens is wise…” In the past I used ULOG to analyze which packets were being dropped by iptables, but since it’s been marked as deprecated I’ve switched to NFLOG.