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86%
Give your servers the once over with Nmap
31.10.2025
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»
Archive
»
2012
»
Issue 11: Cloud...
»
.nmap.org (64.13.134.52): Not shown: 994 filtered ports PORT STATE SERVICE VERSION
22
/tcp open ssh OpenSSH 4.3 (protocol 2.0) 25/tcp closed smtp
85%
Tested: Autoconfiguring IPv6 clients
30.11.2025
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»
Archive
»
2011
»
Issue 5: Pen Te...
»
, the MAC address (e.g.,
00:11:22
:33:44:55) is split down the middle, and two bytes containing FF:FE are inserted. This gives you 64 bits. If the basis is a globally unique address (which should be the case
85%
Business continuity for small to medium-sized enterprises
30.11.2025
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»
Archive
»
2012
»
Issue 08: FreeNAS
»
. In the test scenario, I defined a backup schedule with the following settings: Schedule: weekly Daily full backup: Monday – Friday 20:
00
Daily incremental backup: Monday – Friday 08:
00--18:00
, 30
85%
SSH Administration – Windows in a Unix World
30.11.2025
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»
Archive
»
2010
»
Issue 0: Active...
»
to a remote host, allow this with the command $ xhost +
and then export your display to the remote host on which you want to view the applications. $ export DISPLAY=hostname:
0.0
On the system
84%
Workshop: Container virtualization with LXC on Ubuntu 10.04
30.11.2025
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»
Archive
»
2011
»
Issue 6: Perfor...
»
.network.type = veth 04 lxc.network.flags = up 05 lxc.network.link = br0 06 lxc.network.hwaddr = 08:
00
:12:34:56:78 07 #lxc.network.ipv4 = 0.0.0.0 08 lxc.network.ipv4 = 192.168.1.69 09 lxc.network.name = eth0 10 lxc
84%
High-availability workshop: GFS with DRBD and Pacemaker
30.11.2025
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Archive
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2012
»
Issue 07: Xen v...
»
resource: sudo mkfs.gfs2 -p lock_dlm -j2 -t pcmk:pcmk resource resource is the DRBD resource device node – for example, /dev/drbd/by-res/disk
0/0
. What's missing now is the filesystem resource
84%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
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Archive
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2011
»
Issue 6: Perfor...
»
Model"; 11 $work = "ebiz-tx"; 12 $node1 = "WebServer"; 13 $node2 = "AppServer"; 14 $node3 = "DBMServer"; 15 $think =
0.0
* 1e-3; # as per test system 16 $dtime =
2.2
* 1e-3; # dummy service time 17 18
83%
Moving HPC to the cloud
31.10.2025
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2012
»
Issue 11: Cloud...
»
of options, including dual four-core Xeon, dual six-core Xeon, or quad 12-core AMD processors ranging in speed from
2.2
to 2.9GHz with 24 to 128GB of RAM per server and up to 1TB of scratch local storage per
83%
Managing virtual machines
30.11.2025
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2012
»
Issue 09: Windo...
»
"creating" $vmname 09 10 virsh suspend rhstorage 11 virt-clone -o rhstorage -n $vmname -f /var/lib/libvirt/images/$vmname.qcow 12 virsh resume rhstorage 13 14 oldmac="52:54:
00
:B4:DF:EB" 15 newmac
83%
Connecting dissimilar IPsec implementations
30.11.2025
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Archive
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2011
»
Issue 4: Secure...
»
:31:40: [6694] DEBUG: (lifebyte =
0:0
) 04 2011-01-28 17:31:40: [6694] DEBUG: enctype = 7:7 05 2011-01-28 17:31:40: [6694] DEBUG: (encklen = 128:128) 06 2011-01-28 17:31:40: [6694] DEBUG: hashtype = SHA:SHA 07
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