Browsing All Posts filed under »Linux«

yED – a MS Visio alternative or more?

October 25, 2016

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yED is an alternative software for those engineers who are working with linux and dont like microsoft visio and want make network topologies faster and simplier for free :-) There is a lot of features like automatic layout and easy data import and so on it realy intuitive when you use it. One of the […]

Linux Proxy Settings – Kind of SSO? :-)

October 25, 2016

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Set proxy only at login and unset at logout On some Linux Servers I must reach to the Internet through web proxy with user credentials and i dont have a so called service user everytime. Generally I must set the wget and apt-get and the system wide proxy everytime I login and delete before logout. […]

Digital Certificate types – faq

January 17, 2015

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1. What is the difference between machine digital certificate and user certificate? 1.1 Answer Microsoft Windows specifically: ” Local machine certificate store This type of certificate store is local to the computer and is global to all users on the computer. This certificate store is located in the registry under the HKEY_LOCAL_MACHINE root. Current user […]

Custom Monitoring of Palo Alto with Perl and Cacti

August 30, 2014

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1. The Global Counters The Palo Alto Firewall has released an API, that has some (not all) commands to issue through external programmable interface. This API is based on XML and makes it possible to issue specific commands with that you can check just for example some states of the firewall. Through the API it […]

Custom Monitoring of Cisco ASA with Lynx and Cacti

May 6, 2014

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On packetpushers.net somebody wrote an articel about automatically get the outputs of show command of the cisco asa with lynx. That makes it possible to see if a specific counter for a feature, service or process or just interface counter changes, mainly increases, but you cannot see the size of the increase. In troubleshooting it […]

Query IPSEC VPNs with snmpwalk on Cisco ASA

May 5, 2014

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The followings links can be used for the list of Cisco ASA SNMP MIBs. Cisco ASA SNMP MIBs: ftp://ftp.cisco.com/pub/mibs/supportlists/asa/asa-supportlist.html ftp://ftp.cisco.com/pub/mibs/v2/CISCO-IPSEC-FLOW-MONITOR-MIB.my OIDs Information page: http://www.mibdepot.com/cgi-bin/getmib3.cgi?win=mib_av&i=1&n=CISCO-IPSEC-FLOW-MONITOR-MIB&r=hp&f=ipsec-flow.mi2&v=v2&t=tree IKE SNMP Queries example 1. Check my IP in the firewall that terminates vpns. OID 1.3.6.1.4.1.9.9.171.1.2.3.1.3 OID NAME cikeTunRemoteValue OID Description The value of the local peer identity. If the local […]

Linux Audio Troubleshooting

November 1, 2012

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Imagine I had Linux Mint 12 and I connected my headphone to my linux machine, after disconnecting it I have lost my sound!?! I have alarm sounds in my monitoring system for many¬† companies and it was just silence, no alarms… I had to check the settings with the alsamixer gui (alsamixer command) and something […]