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	<title>jAN fORMAN &#187; linux</title>
	<atom:link href="http://blog.janforman.com/tag/linux/feed/" rel="self" type="application/rss+xml" />
	<link>http://blog.janforman.com</link>
	<description>Enterprise IT Architect / Developer</description>
	<lastBuildDate>Sat, 17 Jul 2010 21:35:37 +0000</lastBuildDate>
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	<language>en</language>
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			<item>
		<title>Content Delivery Network</title>
		<link>http://blog.janforman.com/content-delivery-network/</link>
		<comments>http://blog.janforman.com/content-delivery-network/#comments</comments>
		<pubDate>Tue, 23 Mar 2010 14:50:24 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[cdn]]></category>
		<category><![CDATA[internet]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[php]]></category>

		<guid isPermaLink="false">http://blog.janforman.com/?p=1677</guid>
		<description><![CDATA[Today i was testing simple content delivery network (CDN). it&#8217;s implemented on high-level in application layer and uses reverse proxy (with temporary storage). Network ranges are cached in main database and selected while request is being processed.
Schema is very easy and there&#8217;s no exact limitation about number of users and nodes.
]]></description>
		<wfw:commentRss>http://blog.janforman.com/content-delivery-network/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Imagehosting Maintenance</title>
		<link>http://blog.janforman.com/imagehosting-maintenance/</link>
		<comments>http://blog.janforman.com/imagehosting-maintenance/#comments</comments>
		<pubDate>Sat, 31 Jan 2009 21:49:49 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[imagehosting]]></category>
		<category><![CDATA[linux]]></category>

		<guid isPermaLink="false">http://janforman.com/?p=684</guid>
		<description><![CDATA[Scheduled Maintenance 02/1/2009 from 1:00-03:00 CET
You may not connect or can have problems with loading images :-) thank you for your patience.
ORION.janforman.com virtual server may be down for some time.
]]></description>
		<wfw:commentRss>http://blog.janforman.com/imagehosting-maintenance/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Server friendly grub.conf</title>
		<link>http://blog.janforman.com/server-friendly-grubconf/</link>
		<comments>http://blog.janforman.com/server-friendly-grubconf/#comments</comments>
		<pubDate>Sat, 30 Aug 2008 13:27:25 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[gentoo]]></category>
		<category><![CDATA[grub]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[server]]></category>

		<guid isPermaLink="false">http://janforman.com/?p=310</guid>
		<description><![CDATA[There are two kernels (bzImage and bzSafe), bzImage is experimental one and bzSafe is default.
Copy your testing kernel to bzImage and run # grub-set-default 1
After rebooting your new kernel is trying to boot, if anything goes wrong bzSafe is selected after new reboot.
If you like new kernel, simply copy bzImage to bzSafe &#8230;
&#8211; This is [...]]]></description>
		<wfw:commentRss>http://blog.janforman.com/server-friendly-grubconf/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Linux Network Tuning</title>
		<link>http://blog.janforman.com/linux-network-tuning/</link>
		<comments>http://blog.janforman.com/linux-network-tuning/#comments</comments>
		<pubDate>Sun, 10 Aug 2008 12:26:12 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[network]]></category>
		<category><![CDATA[server]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://janforman.com/?p=242</guid>
		<description><![CDATA[Server oriented optimalization. Be careful this is not 100% RFC compatible, but working nice on my servers
echo &#8220;32767&#8243; >/proc/sys/net/ipv4/tcp_max_tw_buckets_ub
echo &#8220;1024 65000&#8243; >/proc/sys/net/ipv4/ip_local_port_range
echo &#8220;250 32000 100 128&#8243; >/proc/sys/kernel/sem
echo &#8220;65536&#8243; >/proc/sys/net/ipv4/tcp_max_orphans
echo &#8220;4096 87380 16777216&#8243; >/proc/sys/net/ipv4/tcp_rmem
echo &#8220;4096 65536 16777216&#8243; >/proc/sys/net/ipv4/tcp_wmem
echo &#8220;16777216&#8243; >/proc/sys/net/core/rmem_max
echo &#8220;16777216&#8243; >/proc/sys/net/core/wmem_max
echo &#8220;262144&#8243; >/proc/sys/net/core/netdev_max_backlog
echo &#8220;15&#8243;>/proc/sys/net/ipv4/tcp_fin_timeout
echo &#8220;1&#8243; >/proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
echo &#8220;1&#8243; >/proc/sys/net/ipv4/icmp_echo_ignore_all
echo &#8220;1&#8243; >/proc/sys/net/ipv4/
icmp_ignore_bogus_error_responses
echo &#8220;1&#8243; >/proc/sys/net/ipv4/ip_no_pmtu_disc
echo &#8220;0&#8243; >/proc/sys/net/ipv4/tcp_rfc1337
echo &#8220;1&#8243; [...]]]></description>
		<wfw:commentRss>http://blog.janforman.com/linux-network-tuning/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Redirect port to internal network</title>
		<link>http://blog.janforman.com/redirect-port-to-internal-network/</link>
		<comments>http://blog.janforman.com/redirect-port-to-internal-network/#comments</comments>
		<pubDate>Fri, 08 Aug 2008 12:07:47 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[iptables]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[router]]></category>

		<guid isPermaLink="false">http://janforman.com/?p=211</guid>
		<description><![CDATA[DNAT and SNAT settings if you need diferent default gateway in network (I Know&#8230; Little Slower)
# Flush NAT rulez
iptables -t nat -F
# Set DNAT and accept it only from PUBLICCLIENTIP at WANPORT
iptables -t nat -A PREROUTING --src PUBLICCLIENTIP --dst PUBLICROUTERIP -p tcp --dport WANPORT -j DNAT --to-destination LANIP:LANPORT
# Set SNAT for port LANIP/LANPORT
iptables -t nat [...]]]></description>
		<wfw:commentRss>http://blog.janforman.com/redirect-port-to-internal-network/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>SysCP :-) nice server management</title>
		<link>http://blog.janforman.com/syscp-nice-management/</link>
		<comments>http://blog.janforman.com/syscp-nice-management/#comments</comments>
		<pubDate>Thu, 10 Jul 2008 06:55:56 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[gentoo]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[management]]></category>
		<category><![CDATA[server]]></category>
		<category><![CDATA[syscp]]></category>

		<guid isPermaLink="false">http://janforman.com/?p=90</guid>
		<description><![CDATA[

		   		Previous
  		   		Next
CloseSysCP Server Management System Sample Schema


Crystal clear code (only PHP engine used &#8211; PERL free :-)
www.syscp.org
Apache, Lighttpd, Awstats, Courier, Proftpd // Gentoo Supported
]]></description>
		<wfw:commentRss>http://blog.janforman.com/syscp-nice-management/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>SSL_error_rx_unexpected_change_cipher</title>
		<link>http://blog.janforman.com/ssl_error_rx_unexpected_change_cipher/</link>
		<comments>http://blog.janforman.com/ssl_error_rx_unexpected_change_cipher/#comments</comments>
		<pubDate>Wed, 18 Jun 2008 13:09:42 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[apache]]></category>
		<category><![CDATA[firefox]]></category>
		<category><![CDATA[gentoo]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[nginx]]></category>
		<category><![CDATA[openssl]]></category>

		<guid isPermaLink="false">http://janforman.com/?p=85</guid>
		<description><![CDATA[:-) so if you see this error, you have problem with openssl 0.9.8g.
This is small bug in client part of openssl and now is often visible in new Firefox 3
Simply disable TLS v1 in your server (SSHv2 too because of better security)
Insert this line into httpd.conf
&#8212;
SSLProtocol all -TLSv1 -SSHv2
&#8212;
That&#8217;s it :-D
]]></description>
		<wfw:commentRss>http://blog.janforman.com/ssl_error_rx_unexpected_change_cipher/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Wifi Realtek RTL8168 Tuning</title>
		<link>http://blog.janforman.com/rtl8186-wifi-tcp-tuning/</link>
		<comments>http://blog.janforman.com/rtl8186-wifi-tcp-tuning/#comments</comments>
		<pubDate>Tue, 10 Jun 2008 14:46:59 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[mips]]></category>
		<category><![CDATA[network]]></category>
		<category><![CDATA[rtl8186]]></category>
		<category><![CDATA[tuning]]></category>
		<category><![CDATA[wifi]]></category>

		<guid isPermaLink="false">http://janforman.com/?p=84</guid>
		<description><![CDATA[Realtek RTL8186 Datasheet v0.95
// eth0 &#8211; interface connected directly to 5-port switch
// eth1 &#8211; interface WAN
// wlan0 &#8211; wifi minipci directly connected to IC
// maximum transmit thru NAT-router 18Mbit/s
// maximum transmit thru wireless device 23Mbit/s WIFI (54g)
// maximum transmit thru bridge 52Mbit/s (WAN-LAN)
// measured latency thru linux router 1ms
// RTL8305SC Switch
// &#8212; maximum throughput in [...]]]></description>
		<wfw:commentRss>http://blog.janforman.com/rtl8186-wifi-tcp-tuning/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Postfix-greylisting</title>
		<link>http://blog.janforman.com/postfix-greylisting/</link>
		<comments>http://blog.janforman.com/postfix-greylisting/#comments</comments>
		<pubDate>Wed, 07 May 2008 09:37:14 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[gentoo]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[notice]]></category>

		<guid isPermaLink="false">http://janforman.com/?p=69</guid>
		<description><![CDATA[Spamassassin and postfix greylisting feature are now used on my mail server to prevent some (maybe a lot of) incoming spam. Server returns temporary error for unknown IP and destination mail kombination and wait for another try.
# emerge postgrey // that&#8217;s it :-) I love Gentoo
]]></description>
		<wfw:commentRss>http://blog.janforman.com/postfix-greylisting/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>VPS /w OpenVZ &#124;&#124; Fastest .config 2.6.18</title>
		<link>http://blog.janforman.com/openvz-virtuozzo/</link>
		<comments>http://blog.janforman.com/openvz-virtuozzo/#comments</comments>
		<pubDate>Wed, 11 Apr 2007 16:20:24 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[openvz]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://forman.earthcom.info/openvz-virtuozzo/</guid>
		<description><![CDATA[You can download my minimal superfast configuration for 2.6.18 OpenVZ Kernel.
Download TAR GZIP: .config
* no modules
* Athlon XP
* VIA PATA / SATA
* without quota support
* only important things
Switch-on/off anything you need by yourself ;-)
&#8220;OpenVZ is an Operating System-level server virtualization solution, built on Linux. OpenVZ creates isolated, secure virtual environments — VEs (otherwise known as [...]]]></description>
		<wfw:commentRss>http://blog.janforman.com/openvz-virtuozzo/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>ASPSeek &#124;&#124; 1.2.15 RPM Binaries RedHat 5</title>
		<link>http://blog.janforman.com/aspseek/</link>
		<comments>http://blog.janforman.com/aspseek/#comments</comments>
		<pubDate>Sun, 04 Feb 2007 22:00:39 +0000</pubDate>
		<dc:creator>Jan Forman</dc:creator>
				<category><![CDATA[uncategorized]]></category>
		<category><![CDATA[aspseek]]></category>
		<category><![CDATA[centos]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[redhat]]></category>
		<category><![CDATA[search]]></category>

		<guid isPermaLink="false">http://forman.earthcom.info/aspseek-1213-download/</guid>
		<description><![CDATA[It can index a few million URLs and search for words and phrases, use wildcards, and do a Boolean search. Search results can be limited to time period given, site or Web space (set of sites) and sorted by relevance (Page rank is used) or date.
ASPseek is optimized for multiple sites (threaded index, async DNS [...]]]></description>
		<wfw:commentRss>http://blog.janforman.com/aspseek/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
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