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Linux: Improving kswapd

09/08/2007  
Relevance: 9.59
"The current VM can get itself into trouble fairly easily on systems with a small ZONE_HIGHMEM, which is common on i686 computers with 1GB of memory," Rik van Riel said explaining a small patch to cmscan.c. He continued,"on one side, page_alloc() will allocate down to zone->pages_low, while on the other side, kswapd() and balance_pgdat() will try to free memory from every zone, until every zone has more free pages than zone->pages_high." He noted that highmem could be filled up with"page tables, ramfs, vmalloc allocations and other unswappable things quite easily and without many bad side effects, since we still have a huge ZONE_NORMAL to do future allocations from. However, as long as the number of free pages in the highmem zone is below zone->pages_high, kswapd will continue swapping things out from ZONE_NORMAL, too! Sami Farin managed to get his system into a stage where kswapd had freed about 700MB of low memory and was still 'going strong'."
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Zygo Zone

11/21/2006  
Relevance: 9.04
Boldly bringing open source and Linux into the commercial depths of a shopping centre, Zygo Zone opened its first outlet this weekend.
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Restricting zone transfers with IP addresses in BIND DNS Server

10/13/2007  
Relevance: 8.91
DNS server can be attacked using various techniques such as: [a] DNS spoofing [b] Cache poisoning [c] Registration hijacking One of the simplest ways to defend is limit zone transfers between nameservers by defining ACL. I see many admin allows BIND to transfer zones in bulk outside their network or organization. There is no need to do this. Remember you don't have to make an attacker's life easier. Restricting zone transfers with IP addresses in BIND DNS Server
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How to: Linux Configure Demilitarized Zone (DMZ) Firewall

12/15/2007  
Relevance: 8.79
Demilitarized zone, used to secure an internal network from external access. You can use Linux firewall to create DMZ easily. There are many different ways to design a network with a DMZ. The basic method is to use a single Linux firewall with 3 Ethernet cards. The following simple example discussesLinux DMZ setup and forwarding public traffic to internal servers.
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Removing Local Zone File Systems On Solaris 10 Unix

10/23/2008  
Relevance: 8.58
How to remove existing local zone file systems on Solaris 10. Today's post is a follow-up to our very recent posts on modifying existing local zone filesystems and creating new file systems in a local zone on Solaris 10. Today, we're moving to completion with this simple how-to on removing filesystems on local zones. We'll follow up with another simple post on how to create and destroy (all in one) local zones on Solaris 10.
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Modifying Existing Local Zone File Systems On Solaris 10 Unix

10/22/2008  
Relevance: 8.02
How to modify an existing local zone's file systems on Solaris 10. Today's post is a follow-up to yesterday's post on creating new file systems in a local zone on Solaris 10. Today, we're moving on to a simple how-to on modifying existing local zones. As some of you may have noticed, with yesterday's post, I managed to blithely bypass the creation of the local zone we were working on.
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Department of Homeland and Security wants master key for DNS

04/03/2007  
Relevance: 7.34
The US Department of Homeland Security (DHS) wants to have the key to sign the DNS root zone solidly in the hands of the US government. This ultimate master key would then allow authorities to track DNS Security Extensions (DNSSec) all the way back to the servers that represent the name system's root zone on the Internet.[Not Linux related, but definitely of interest to LXer audience— Sander]
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Creating And Deleting Local Zones On Solaris 10 Unix

10/24/2008  
Relevance: 6.35
Simple"how to" on creating and deleting local zones on Solaris 10. Today's post is the final post in our quick series on dealing with local zones on Solaris 10. If you want to check the previous entries out, finish this paragraph. If you don't (or already have), just skip past this one :) The previous posts in this series have dealt with already-created local zones and how to create new file systems in a local zone on Solaris 10, modify filesystems in existing local zones and remove file systems in a local zone.
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Microsoft Media Player shreds your rights

09/26/2006  
Relevance: 5.55
No, this has nothing to do with Linux...BUT do we know anyone who NEEDS to be warned of this? MS has passed the Audacity Zone lone ago. It is now a straight punch in the face to Microsoft customers.
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Worst Hardware For Your Linux Desktop

05/15/2008  
Relevance: 5.32
I have been asked this over and again - which hardware should be avoided before installing Linux? The list is actually smaller than you might expect, but it is helpful if you would like to remain in a headache-free zone.
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