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How to backup your perfmon counters The easiest way to backup your perfmon counters is to use the lodctr tool Lodctr Registers new Performance counter names and Explain text for a service or device driver, and saves and restores counter settings and Explain text. Syntax lodctr [\\ComputerName] FileName [/s:FileName] [/r:FileName] Example lodctr /s:”perf backup1.txt” . . . → Read More: backup perfmon counters Using you Roku at a hotel can be problematic because you are unable to accept the terms of service when using the internet. This post explains how to use a Roku at a Hotel. These instructions can be followed pretty much verbatim for any other device (wii u, xbox, etc). Instructions Go to “Settings”, and . . . → Read More: Howto Use Roku at a Hotel To block countries behind an ELB (Elastic Load Balancer) you should use Maxmind’s GeoIP Country Database. Problem You are unable to use iptables or ipset to block countries because of your Amazon Elastic Load Balancer Solution Use Maxmind’s GeoIP Country Database in conjunction with Apache or NGINX Example This example is for Ubuntu 12.04 (Precise) . . . → Read More: Block Countries Behind ELB Adding Godaddy Cert to EC2 ELB Setup AWS Command Line Interface Setup instructions are found here: http://aws.amazon.com/cli/ Define your files and run these commands: # define these crtdomain=”example.com” crtchain=”gd_bundle.crt” echo “converting to pem format” openssl rsa -in ${crtdomain}.key -out aws-${crtdomain}.key openssl x509 -in ${crtdomain}.crt -out aws-${crtdomain}.crt -outform PEM echo “uploading certificate ${crtdomain} to Amazon” aws . . . → Read More: EC2 ELB Godaddy Cert Description Logstash filters for ssh brute for, sudo auth failures, or failed login attempts Filters grok { type => “syslog” patterns_dir => [“/opt/logstash/patterns”] pattern => [ “%{SYSLOGLINE}” ] } grep { type => “syslog” drop => false match => [ “@message”, “([fF]ailed|[fF]ailure).*password|authentication.*failure|incorrect.password” ] add_tag => [ “auth_failure” ] } grep { type => “syslog” drop . . . → Read More: logstash filters for ssh attempts How to get Logstash to read your ec2 instance id logstash.sh !/bin/bash EC2_INSTANCE_ID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id) export EC2_INSTANCE_ID conf=/opt/logstash/simple.conf lsjar=/opt/logstash/logstash.jar myjava=$(which java) if [ -z $myjava ]; then echo “java is required; please install openjdk or jre” exit 1 fi # spawn logstash $myjava -jar $lsjar agent -f $conf config file /opt/logstash/simple.conf input { exec { . . . → Read More: logstash ec2 instanceid Objective: Set Timezone to UTC on Ubuntu 12.04 LTS Howto You will be using tzdata and ntpdate Setting the timezone After running this select “etc” (hit enter) then select “UTC” (hit enter) pkg-reconfigure tzdata Syncing the clock apt-get -y install ntpdate ntpdate pool.ntp.org Updating crontab to sync clock daily crontab -l > tmp.cron echo “@daily . . . → Read More: Ubuntu Set Timezone to UTC Howto Convert a ESXv5 to ESXv4 VM This details the steps needed to convert a machine from ESXv5 to ESXv4 Convert OVA to VMX On ESXv5 Machine, Export the VMWare ESX5 Machine to OVF (File -> Export -> Export OVF Template) Download ovftool Convert ova to vmx (ignoring manifest errors) ovftool sourefile.ova destfile.vmx (make sure . . . → Read More: Howto Convert a ESXv5 to ESXv4 VM here’s a nohup example: nohup nice -n -19 /bin/bash cidr_to_ipset.sh all_countries.txt 2>&1 >/root/cidr_to_ipset_output.log </dev/null & nohup is a POSIX command to ignore the HUP (hangup) signal. The HUP signal is, by convention, the way a terminal warns dependent processes of logout. Output that would normally go to the terminal goes to a file called nohup.out . . . → Read More: nohup example To use Apache ProxyPass directives with dynamic hostnames you will need to also use ModRewrite. Objective All requests to the virtualhost will ProxyPass and ProxyPassReverse (also known as an “Apache Gateway”) to the %{HTTP_HOST} The only reason this would make sense to do is if you have localhost entries on the apache server for specfic . . . → Read More: Apache ProxyPass with dynamic hostname |
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