Browsing All Posts filed under »Security«

Firewall Datasheets – Behind the scene

April 16, 2013

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I have just analysed some small office firewalls – with the newer expression UTM devices – from the market leaders and checked their datashits. The vendors have still to much freedom to express the advantages of their products and write performance values without giving complete description on it. The published performance values say not too […]

ClusterXL – New HA mode

February 28, 2013

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It is just a quick note for fast knowledge recovery about ClusterXL for me :-) There are 4 ClusterXL modes: -Load Sharing Multicast Mode -Load Sharing Unicast Mode -New High Availability Mode -> This is what is under magnifier now. -High Availability Legacy Mode Sniffered packet Command used: # tcpdump -i bond1 -evvxn udp 8116 […]

The nine

February 15, 2013

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Normally I do not write about new releases from security product manufacturers, but this Cisco ASA version resolves some disadvantages against Checkpoint. IT IS And I would be glad to test those since I am a Cisco fun :-) The HW models are all supported, the question is if the features make it too: … […]

Fire in the hole

February 15, 2013

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In this post I tested in my lab if tunneling with icmp really opens a hole that a simple stateful firewall cannot realize. ICMP is a protocol that is opened everywhere since we need it for our daily job and honestly I have never thought that even with this I open a hole on firewall. […]

my problem with clusterXL_admin command

February 6, 2013

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The clusterXL_admin command is really fine, but i think it is not ready now. It has just one big problem – in my point of view. But the whole post has really low priority…it is really only for geeks. :-) Lets say the cluster members should be restarted but with a controlled way. How can […]

SecurePlatform and grub

November 7, 2012

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This post is a short story and a summary what grub means and how it is used under SPLAT. After installing R70 Provider-1 on an Openserver and upgrading it to R70.40 I do not have experienced any problem. After upgrading from R70.40 to R70.50 the server just booted again and again with kernel panic, there […]

Migrate Cisco ASA configuration, certificates and private keys

November 4, 2012

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The fact I wrote this post is to clear what happens with the RSA keys if I move the whole configuration and certificates and their private keys to another firewall with the same IP Address. IF the IP has changed the migration ofthe certificate has not much sense if the certificate is based on IP. […]

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 […]

Watching TV on the highway

November 1, 2012

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That was the most important and critical security issue I have ever had! :-) I wanted to see the big jump, the Red Bull Stratos, but I was on the way home. I have tried to watch it on the road with my linux mint laptop. I have already had a Geniatech DVB-T TV Stick […]

Find all user-installed packages

November 1, 2012

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I wanted to know after couple of month what I have installed on my computer with linux. Just in case I have to reinstall my linux I want to know what tools and applications I have installed earlier. It is quite easy to list them for future references actually for brand new installations. I have […]