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A collection of 47 posts

SSH Unable to negotiate

SSH Unable to negotiate

Trying to connect to some older Cisco routers from a reasonabley modern linux machine gave me the following errors: Unable to negotiate with 1.1.1.1 port 22: no matching host key type found. Their offer: ssh-rsa Unable to negotiate with 1.1.1.1 port 22: no matching

Simple traffic control tester (traffic mangling)

Simple traffic control tester (traffic mangling)

This post covers how to make a nice simple (cheap!) but still powerful traffic ‘mangler’ :) It can quite granularly control the bandwidth, latency, loss and error injection levels without having to re-plumb or reconfigure the network you are trying to test. To do this we’ll use two nice features

Batch re-encode videos based on resolution, filetype and codec

Batch re-encode videos based on resolution, filetype and codec

Its been quite handy recently to re-encode some old videos to x265/HEVC to save a bit (actually a fair bit :o) of disk space now that most devices at home can playback x265 videos in hardware. The main downside is its realtivly slow and finding the videos I wanted

Specifically disable certificate verification in lftp

Specifically disable certificate verification in lftp

LFTP is a great FTP program that I use quite regularly. I recently had a problem connecting to a server (that I didnt control) and getting the following error due to the cert being self signed:

Install and verify softflowd for Netflow on OpenWrt

Install and verify softflowd for Netflow on OpenWrt

softflow is a great opensource Netflow exporter that is support on OperWrt :) This allows us to sample the flows running through our OpenWrt router, export them to a netflow analyzer (more on those in a future post) and "see" our traffic. Netflow is much richer in information than just SNMP

movie search script for eggdrop bot using api

movie search script for eggdrop bot using api

Recently another script I used to search for film information got broken. After a quick look around I found the nice people over at OMDb (http://www.omdbapi.com/) who have a good API to expose things like IMDB rating and other information regarding movies. Its a simple script (as

Twitter Eggdrop script

Twitter Eggdrop script

I've started to play around the the Twitter API a little and created a small script to grab the contents of a spammed tweet link and display it in the channel. Requires a v1 API key etc for Oauth which you can request here: https://apps.twitter.com/ Take a

News script for eggdrop bot

News script for eggdrop bot

This script uses the API from newsapi.org to return the latest headlines from a users preselected news site. Requires +news set on the channel and your own free API key Any comment or suggestions more then welcome :) Example screenshot: Script can be grabbed [here]. Script: ################################################################################################ # Name m00nie::news # Description

kodi-pvr-mythtv addon for Fedora (25)

kodi-pvr-mythtv addon for Fedora (25)

Kodi MythTV PVR automated packages from rpmfusion. and unitedrpms. sadly haven't been working on my Fedora 24 or 25 systems for quite sometime with crashes and failures to load that I couldnt figure out easily. I've manually built the addon using the following commands (on a 64bit Fedora 25 system)

Subnet Calculator

Subnet Calculator

A simple subnet calculator that will accept either an IPv4 or IPv6 subnet in CIDR notation For example 192.168.10.0/29 or beef::/112 is acceptable. The tool (should) automatically detect the IP version and output accordingly (broadcast for v4 etc). It will output info like first/last

Gif search script for eggdrop bot

Gif search script for eggdrop bot

Just another small script that uses the nice API over at giphy to return gif links based on the query from a user. Requires +giphy set on the channel but hopefully a very simple and straight forward script although as ever any comment or suggestions more then welcome :) Script can

Juniper SRX IPv6 (VDSL or FFTC)

Juniper SRX IPv6 (VDSL or FFTC)

Recently ZEN announced an open IPv6 trial in the UK and first impressions are very good (just like the rest of their service :D ) DHCPv6 using prefix delegation (RFC 3633) is being used to issue each subscriber with a /48 range. Its maybe a small step but a nice one

Image search script for eggdrop (Bing API)

Image search script for eggdrop (Bing API)

***BING have since closed their API so this script no longer works :( Sadly one of the few APIs that still provides access to image search now the Bing API provides all the results for this script. Again a very simple script (it has a simple function? :)) Users can trigger and

Weather eggdrop script for wunderground.com API

Weather eggdrop script for wunderground.com API

*** This API has since been closed by Wunderground :( Please look HERE for an more modern alternative This is a simple script tcl script for an eggdrop that will allow users to set a default location and then grabs current conditions or a 3 day forecast using that default location or

Install GNS3 1.x on Fedora 22

Install GNS3 1.x on Fedora 22

Quick guide to installing the quite awesome GNS3. Very similar process to Fedora 20 but this time using DNF and a small adjustment on some package names with some extras included now for dynamips to compile since it now uses cmake. Install dependencies sudo dnf install git gcc python3-devel python-pip

Decrypt HTTPS (SSL/TLS) with Wireshark

Decrypt HTTPS (SSL/TLS) with Wireshark

Wireshark has some very nice SSL/TLS decryption features tucked away although you need either of the following two: * Access to the servers private pki key * Access to the client machines and its (pre)master secrets (also need Firefox or Chrome) Unfortunately, dumping the premaster secret was removed in FireFox

DMVPN setup with PSK (GNS3 Lab)

DMVPN setup with PSK (GNS3 Lab)

Dynamic Multipoint VPNs (DMVPN) offer a low admin overhead and scalable VPN solution. It is also efficient at routing traffic as it can dynamically reconfigure itself from a hub and spoke to a partial or full mesh topology! This means that not all traffic has to pass through the hub

EIGRP (Named vs Legacy)

EIGRP (Named vs Legacy)

Just a quick look over the basic differences with the newer style of EIGRP config. It really is quite a bit nicer (more logcal?) layout in the config with things like authentication moving under the eigrp config so its easy to see related config under one section of show run

Youtube eggdrop script using API v3

Youtube eggdrop script using API v3

Just a very simple eggdrop script that allows users to search on youtube using the youtube and will also return some information for any youtube link spamming into the channel set with +youtube. This uses the youtube v3 API. You can grab your own API key [here]. This script is

Kuvaton Eggdrop script

Kuvaton Eggdrop script

A very simple little TCL script for an eggdrop bot that will grab either some random images or return search results from http://kuvaton.com/. Any problems or suggestions just let me know. Example: Script should hopefully be quite readable and reusable :) #################################################################### # Name moonie:kuvaton # # Author m00nie # # Description Grabs some

Simple script to add route to exaBGP

Simple script to add route to exaBGP

Continuing to play around with the very fine exaBGP. This time adding my own little script to announce a new route and reload the exaBGP config to announce the new prefix :) Please note this script makes use of another script that I posted about [here] and I have the script

BGP RTBH setup using exaBGP

BGP RTBH setup using exaBGP

In this post I'll describe a basic setup using Cisco IOS, IOS XR and exaBGP that will function as a BGP remotely triggered blackhole (RTBH) allowing you to null route any source/destination prefix. The example topology will be as below: exaBGP by a very nice man called Thomas Mangin

Fedora 19 how to install GNS3

Fedora 19 how to install GNS3

Doesnt seem to be a package for GNS3 on Fedora but installing from source is pretty straight forward :) The example below uses the latest version at the time of writing which was 0.8.4 stable. wget http://sourceforge.net/projects/gns-3/files/GNS3/0.8.4/GNS3-0.8.4-src.

Difference between Router Descriptor (RD) and Route Target (RT)

642-691 BGP+MPLS

Difference between Router Descriptor (RD) and Route Target (RT)

Studying towards the SPEDGE (great word Cisco!) tonight and couldn't quite define exactly Route Descriptors and Route Targets. So lets try First off it might be important (and obvious) to note both RT and RDs will only ever be configured and used on PE nodes! P and CE nodes dont

Use tcpdump to analyse HTTP POST data

Use tcpdump to analyse HTTP POST data

Today it has been useful to look at POST data being sent to this webserver. A nice filter to do this at the console with tcpdump is: tcpdump -s 0 -A 'tcp dst port 80 and (tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x504f5354)' This will capture and output