Networking - Rambles of Ev

HP Procurve Fan and Temps Sensors

https://kb.paessler.com/en/topic/73833-can-i-monitor-my-hp-procurve-switch-health https://exchange.nagios.org/directory/Plugins/Hardware/Network-Gear/HP/HP-Procurve-SNMP-monitor/details Setup 1. Create a new SNMP Custom Advanced Sensor [https://www.paessler.com/manuals/prtg/snmp_custom_advanced_sensor] on the device 2. Configure the channels like in the below table: NameOIDValue

Linux

Linux Unifi Controller Change Admin password

Password reset procedure for Linux: 1. Find out your username. If you don’t know it any more and it’s not ‘admin’, run this command to get all Admin users on the controller: mongo --port 27117 ace --eval "db.admin.find().forEach(printjson);" You should get a result like

Debian

Unifi on Debian

1. install unifi, with wheezy provided mongodb (2.0.6) echo "deb http://www.ubnt.com/downloads/unifi/debian stable ubiquiti" >> /etc/apt/sources.list apt-key adv --keyserver keyserver.ubuntu.com --recv 06E85760C0A52C50 apt-get update apt-get install unifi 2. disable mongodb daemon nano /etc/init.d/mongodb ENABLE_MONGODB="yes"

Networking

Older Unifi Controller Software

Older Unifi controller software. 2.4.6: http://www.ubnt.com/downloads/unifi/2.4.6/UniFi-installer.exe https://community.ubnt.com/t5/UniFi-Updates-Blog/UniFi-2-4-6-is-released/ba-p/592033 3.2.10: http://www.ubnt.com/downloads/unifi/3.2.10/UniFi-installer.exe https://community.ubnt.com/t5/UniFi-Updates-Blog/UniFi-3-2-10-is-released/ba-p/1165532

Linux

How to kick everyone around you off wifi with Python

Description: This script will find the most powerful wifi interface and turn on monitor mode. If a monitor mode interface is already up it will use the first one it finds instead. It will then start sequentially hopping channels 1 per second from channel 1 to 11 identifying all access

Linux

How to Test Your Internet Speed from Command Line Using Speedtest

Install speedtest-cli Using Python Script wget --no-check-certificate -O speedtest https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py chmod +x speedtest mv speedtest /usr/local/bin/

Bash

How to measure packets per second or throughput on high speed network interface - Xmodulo

There are many traffic monitoring tools available on Linux, which can monitor/classify network traffic, and report real-time traffic statistics in fancy user interfaces. Most of these tools (e.g., ntopng [http://xmodulo.com/2013/10/set-web-based-network-traffic-monitoring-linux.html] , iftop [http://xmodulo.com/2012/06/how-to-install-iftop-on-linux.html]) are powered by libpcap

Config

Plex: You do not have permission to access this server

I can give you a workaround for this that I’ve used. In the jail edit the file Plex Media Server Preferences.xml file (in my case) located at: /usr/local/plexdata/Plex Media Server/Preferences.xml and add the attribute disableRemoteSecurity="1" to the Preferences element. Then give your

Linux

Renaming ethernet interfaces from “p1p1″ to “eth0″

Just edit /etc/default/grub and find these lines; GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" Add biosdevname=0 to them; GRUB_CMDLINE_LINUX_DEFAULT="biosdevname=0 quiet splash" GRUB_CMDLINE_LINUX="biosdevname=0" Then run ‘sudo update-grub’ and reboot. Good to go!

Apache2

Apache MaxClients Calculation

MaxClients: The MaxClients directive sets the limit on the number of simultaneous requests that will be served. Any connection attempts over the MaxClients limit will normally be queued, up to a number based on the ListenBacklog directive. Once a child process is freed at the end of a different request,

Linux

Start VNC together with LightDM

If you want to start a VNC server before login on your Linux machine a good option is to make the graphical login manager start the VNC server, in my case LightDM. This solution will restart the VNC server if you logout since the VNC server will exit on logout.

Network

Remove a known network from Windows 8

Find and delete the registry keys for the unwanted networks under these locations: > HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList\Nla\Cache\Intranet HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList\Profiles HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList\Signatures\Unmanaged If you don’t

ESXi 5.1

ESXi 5.1 host accepts no network connections

NOTE: Check the name of your datastore and replace “datastore1” in these instructions with the appropriate name of your actual datastore.This process will get your Supermicro 1u w/ x7dca-l and 2 Xeon L5420’s running ESXi 5.1 with functional NICs, using a USB key:1) Download this file:

e1000e

2754L spontaneous freeze networking

Try put pcie_aspm=off in the kernel boot line of grub. You might try editing or creating a new file in /etc/modprobe.d called e1000e.conf and adding a line to that that says > options e1000e IntMode=1,1 Each 1 is for each NIC. Eg. If you

firewall

Iptables and Connection Limits

Create connection limits for any users using a very basic script in the firewall area as shown below > iptables -I FORWARD -p tcp --syn -m iprange --src-range 10.212.1.100-10.212.3.200 -m connlimit --connlimit-above 60 -j DROP iptables -I FORWARD -p tcp --syn -m iprange --src-range 10.

Linux

Ubuntu - Bring up interface without ip

On an Ubuntu server you can add the following to/etc/network/interfaces: > auto ethX iface ethX inet manual up ifconfig ethX up X= Interface that want to use.

Linux

Add Static Route Multicast in Ubuntu

On an Ubuntu server you can add the following to/etc/network/interfaces: # static route > up route add -net 224.0.0.0/4 dev ethX or # static route > up route add -net 224.0.0.0/4 gw interfaceIP X= Interface that want to use multicast Add Static Route

Linux

Ubuntu 12.04 - Updating Wifi Drivers

That’s what we’re going to do; add the device ID to the driver files and compile a new version. Please be sure you have a wired ethernet connection and do: > sudo apt-get install linux-headers-generic build-essential Now go here and download compat-wireless-2.6.tar.bz2 to your desktop. http:

iptables

Prevent DOS with iptables | Shadows of epiphany

Prevent DOS with iptables | Shadows of epiphany [http://blog.bodhizazen.net/linux/prevent-dos-with-iptables/]. Prevent DOS with iptables Posted on October 27, 2010 [http://blog.bodhizazen.net/linux/prevent-dos-with-iptables/] by bodhi.zazen [http://blog.bodhizazen.net/author/bodhizazen/]After a recent conversation on the Ubuntu Forums [http://ubuntuforums.org/showthread.php?

iptables

IP Tables Primer

IP Tables Primer [http://bodhizazen.net/Tutorials/iptables/]. Note:The above “IPTables Flow chart” was originally published here [http://www.frozentux.net/iptables-tutorial/chunkyhtml/c962.html#TRAVERSINGGENERAL] , is licensed under the GNU FDL [http://www.gnu.org/copyleft/fdl.html], and is used with permission. Table of Contents 1. Overview

ESXi

How To Patch vSphere 5 ESXi Without Update Manager

Since vSphere ESXi 5.0 uses the new VIB model the commands and process have changed slightly but the basic concepts are the same. 1. Download the patch file you want directly from the VMware Patch Portal 2. Ensure that you enable SSH for remote support on the ESXi Host

Linux

Virtual SMTP servers with a Postfix Relay - Ubuntu Forums

Virtual SMTP servers with a Postfix Relay -------------------------------------------------------------------------------- Did you try: > relay_domains = example.com, example.net and also something you need to know. you dont need to set the mx record as in the same domain your want it to work for. let say you need example.net and

Configuration

Debian and Interface with No IP

Bringing up an interface without an IP address To create a network interface without an IP address at all use the manual method and use pre-up and post-down commands to bring the interface up and down. > iface eth0 inet manual pre-up ifconfig $IFACE up post-down ifconfig $IFACE down

DNS

Creating a DNS Black Hole for Captive Portal Clients - PFSenseDocs

Creating a DNS Black Hole for Captive Portal Clients – PFSenseDocs [http://doc.pfsense.org/index.php/Creating_a_DNS_Black_Hole_for_Captive_Portal_Clients] . If you need to direct all of your portal clients to a single page, but the clients can fail to redirect due to flaky DNS

ESXi

Direct shortcut for opening a console to VMWare ESXi 4.x virtual machine

Got finally sick of opening the vSphere client every time I needed access to a virtual machine running on my ESXi 4.1 server. Did some googling and trying out couple of options and finally found a way to do this. > “C:\Program Files\VMWare\Infrastructure\Virtual Infrastructure Client\4.