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	<title>hemmler.net</title>
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	<description>let there be blog</description>
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		<item>
		<title>MySQL server has gone away &#8211; Error 2006</title>
		<link>http://www.hemmler.net/mysql-server-has-gone-away-error-2006/</link>
		<comments>http://www.hemmler.net/mysql-server-has-gone-away-error-2006/#comments</comments>
		<pubDate>Tue, 08 May 2012 11:41:32 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[MySQL]]></category>

		<guid isPermaLink="false">http://www.hemmler.net/?p=536</guid>
		<description><![CDATA[Beim Dump einer großen Datenbank mit dem Befehl: /usr/local/bin/mysqldump --skip-opt --add-drop-table --create-options -q --set-charset -K -Q -f -h192.168.1.1 -ppassword testdb &#62; testdb.sql tritt folgender Fehler auf: mysqldump: Couldn't execute 'SET OPTION SQL_QUOTE_SHOW_CREATE=1': MySQL server has gone away (2006) mysqldump: Couldn't execute 'show table status like 'xxxxx'': MySQL server has gone away &#40;2006&#41; Folgende Lösungsansätze helfen: [...]]]></description>
			<content:encoded><![CDATA[<p>Beim Dump einer großen Datenbank mit dem Befehl:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap"><span style="color: #000000; font-weight: bold;">/</span>usr<span style="color: #000000; font-weight: bold;">/</span>local<span style="color: #000000; font-weight: bold;">/</span>bin<span style="color: #000000; font-weight: bold;">/</span>mysqldump <span style="color: #660033;">--skip-opt</span> <span style="color: #660033;">--add-drop-table</span> <span style="color: #660033;">--create-options</span> <span style="color: #660033;">-q</span> <span style="color: #660033;">--set-charset</span> <span style="color: #660033;">-K</span> <span style="color: #660033;">-Q</span> <span style="color: #660033;">-f</span> -h192.168.1.1 <span style="color: #660033;">-ppassword</span> testdb <span style="color: #000000; font-weight: bold;">&gt;</span> testdb.sql</div></div>
<p>tritt folgender Fehler auf:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">mysqldump: Couldn<span style="color: #ff0000;">'t execute '</span>SET OPTION <span style="color: #007800;">SQL_QUOTE_SHOW_CREATE</span>=<span style="color: #000000;">1</span><span style="color: #ff0000;">': MySQL server has gone away (2006)<br />
mysqldump: Couldn'</span>t execute <span style="color: #ff0000;">'show table status like '</span>xxxxx<span style="color: #ff0000;">''</span>: MySQL server has gone away <span style="color: #7a0874; font-weight: bold;">&#40;</span><span style="color: #000000;">2006</span><span style="color: #7a0874; font-weight: bold;">&#41;</span></div></div>
<p>Folgende Lösungsansätze helfen:</p>
<p>1. In der my.cnf diesen Wert erhöhen:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">max_allowed_packet = 64M</div></div>
<p>2. Den Befehl zum dumpen um die Option &#8220;&#8211;skip-extended-insert&#8221; erweitern:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap"><span style="color: #000000; font-weight: bold;">/</span>usr<span style="color: #000000; font-weight: bold;">/</span>local<span style="color: #000000; font-weight: bold;">/</span>bin<span style="color: #000000; font-weight: bold;">/</span>mysqldump <span style="color: #660033;">--skip-extended-insert</span> <span style="color: #660033;">--skip-opt</span> <span style="color: #660033;">--add-drop-table</span> <span style="color: #660033;">--create-options</span> <span style="color: #660033;">-q</span> <span style="color: #660033;">--set-charset</span> <span style="color: #660033;">-K</span> <span style="color: #660033;">-Q</span> <span style="color: #660033;">-f</span> -h192.168.1.1 <span style="color: #660033;">-ppassword</span> testdb <span style="color: #000000; font-weight: bold;">&gt;</span> testdb.sql</div></div>
<p>3. Andere Dumps &#8220;blockieren&#8221; den gewünschten Dump. In diesem Fall mit &#8220;ps aux&#8221; schauen ob noch andere Prozesse laufen, und diese ggfs. beenden.</p>
]]></content:encoded>
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		</item>
		<item>
		<title>FreeBSD 9 &#8211; $ipv6_enable is obsolete</title>
		<link>http://www.hemmler.net/freebsd-9-ipv6_enable-is-obsolete/</link>
		<comments>http://www.hemmler.net/freebsd-9-ipv6_enable-is-obsolete/#comments</comments>
		<pubDate>Tue, 24 Apr 2012 09:11:25 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[FreeBSD]]></category>

		<guid isPermaLink="false">http://www.hemmler.net/?p=531</guid>
		<description><![CDATA[Error-Message: WARNING: $ipv6_enable is obsolete. &#160;Use $ipv6_activate_all_interfaces instead. /etc/rc.conf (alt) ipv6_enable=&#34;YES&#34; ipv6_defaultrouter=&#34;2001:4711:5:0:0:0:5:1&#34; ipv6_ifconfig_bge1=&#34;2001:4711:5:0:0:0:5:88/112&#34; /etc/rc.conf (neu) ipv6_activate_all_interfaces=&#34;YES&#34; ipv6_defaultrouter=&#34;2001:4711:5:0:0:0:5:1&#34; ifconfig_bge1_ipv6=&#34;inet6 2001:4711:5:0:0:0:5:88/112&#34;]]></description>
			<content:encoded><![CDATA[<p>Error-Message:</p>
<div class="codecolorer-container text geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="text codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">WARNING: $ipv6_enable is obsolete. &nbsp;Use $ipv6_activate_all_interfaces instead.</div></div>
<p>/etc/rc.conf (alt)</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap"><span style="color: #007800;">ipv6_enable</span>=<span style="color: #ff0000;">&quot;YES&quot;</span><br />
<span style="color: #007800;">ipv6_defaultrouter</span>=<span style="color: #ff0000;">&quot;2001:4711:5:0:0:0:5:1&quot;</span><br />
<span style="color: #007800;">ipv6_ifconfig_bge1</span>=<span style="color: #ff0000;">&quot;2001:4711:5:0:0:0:5:88/112&quot;</span></div></div>
<p>/etc/rc.conf (neu)</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap"><span style="color: #007800;">ipv6_activate_all_interfaces</span>=<span style="color: #ff0000;">&quot;YES&quot;</span><br />
<span style="color: #007800;">ipv6_defaultrouter</span>=<span style="color: #ff0000;">&quot;2001:4711:5:0:0:0:5:1&quot;</span><br />
<span style="color: #007800;">ifconfig_bge1_ipv6</span>=<span style="color: #ff0000;">&quot;inet6 2001:4711:5:0:0:0:5:88/112&quot;</span></div></div>
]]></content:encoded>
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		</item>
		<item>
		<title>Umstieg von capsd auf provisiond &#8211; OpenNMS</title>
		<link>http://www.hemmler.net/umstieg-von-capsd-auf-provisiond-opennms/</link>
		<comments>http://www.hemmler.net/umstieg-von-capsd-auf-provisiond-opennms/#comments</comments>
		<pubDate>Thu, 19 Apr 2012 09:12:10 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[OpenNMS]]></category>
		<category><![CDATA[capsd]]></category>
		<category><![CDATA[provisiond]]></category>

		<guid isPermaLink="false">http://www.hemmler.net/?p=487</guid>
		<description><![CDATA[#### Achtung, noch nicht komplett fertig. Kommentare/Verbesserungen/Hinweise sind erwünscht! #### 1. Capsd in der service-configuration.xml abschalten &#160; &#60;!-- &#160;&#60;service&#62; &#160; &#160;&#60;name&#62;OpenNMS:Name=Capsd&#60;/name&#62; &#160; &#160;&#60;class-name&#62;org.opennms.netmgt.capsd.jmx.Capsd&#60;/class-name&#62; &#160; &#160;&#60;invoke at=&#34;start&#34; pass=&#34;0&#34; method=&#34;init&#34;/&#62; &#160; &#160;&#60;invoke at=&#34;start&#34; pass=&#34;1&#34; method=&#34;start&#34;/&#62; &#160; &#160;&#60;invoke at=&#34;status&#34; pass=&#34;0&#34; method=&#34;status&#34;/&#62; &#160; &#160;&#60;invoke at=&#34;stop&#34; pass=&#34;0&#34; method=&#34;stop&#34;/&#62; &#160;&#60;/service&#62; &#160; --&#62; 2. In der opennms.properties habe ich das Discovery ebenfalls [...]]]></description>
			<content:encoded><![CDATA[<p>#### Achtung, noch nicht komplett fertig. Kommentare/Verbesserungen/Hinweise sind erwünscht! ####</p>
<p>1. Capsd in der service-configuration.xml abschalten</p>
<div class="codecolorer-container xml geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="xml codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">&nbsp; <span style="color: #808080; font-style: italic;">&lt;!-- </span><br />
<span style="color: #808080; font-style: italic;"> &nbsp;&lt;service&gt;</span><br />
<span style="color: #808080; font-style: italic;"> &nbsp; &nbsp;&lt;name&gt;OpenNMS:Name=Capsd&lt;/name&gt;</span><br />
<span style="color: #808080; font-style: italic;"> &nbsp; &nbsp;&lt;class-name&gt;org.opennms.netmgt.capsd.jmx.Capsd&lt;/class-name&gt;</span><br />
<span style="color: #808080; font-style: italic;"> &nbsp; &nbsp;&lt;invoke at=&quot;start&quot; pass=&quot;0&quot; method=&quot;init&quot;/&gt;</span><br />
<span style="color: #808080; font-style: italic;"> &nbsp; &nbsp;&lt;invoke at=&quot;start&quot; pass=&quot;1&quot; method=&quot;start&quot;/&gt;</span><br />
<span style="color: #808080; font-style: italic;"> &nbsp; &nbsp;&lt;invoke at=&quot;status&quot; pass=&quot;0&quot; method=&quot;status&quot;/&gt;</span><br />
<span style="color: #808080; font-style: italic;"> &nbsp; &nbsp;&lt;invoke at=&quot;stop&quot; pass=&quot;0&quot; method=&quot;stop&quot;/&gt;</span><br />
<span style="color: #808080; font-style: italic;"> &nbsp;&lt;/service&gt;</span><br />
<span style="color: #808080; font-style: italic;"> &nbsp; --&gt;</span></div></div>
<p>2. In der opennms.properties habe ich das Discovery ebenfalls auf provisiond umgestellt</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap"><span style="color: #666666; font-style: italic;">#org.opennms.provisiond.enableDiscovery=false</span><br />
org.opennms.provisiond.enableDiscovery=<span style="color: #c20cb9; font-weight: bold;">true</span></div></div>
<p>3. Dann habe ich aus den ganzen Checks entsprechende Detektoren (default-foreign-source.xml) gebaut. Zum Beispiel diese hier:</p>
<div class="codecolorer-container xml geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="xml codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap"><span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;detector</span> <span style="color: #000066;">class</span>=<span style="color: #ff0000;">&quot;org.opennms.netmgt.provision.detector.simple.FtpDetector&quot;</span> <span style="color: #000066;">name</span>=<span style="color: #ff0000;">&quot;FTPS&quot;</span><span style="color: #000000; font-weight: bold;">&gt;</span></span><br />
&nbsp; &nbsp; <span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;parameter</span> <span style="color: #000066;">value</span>=<span style="color: #ff0000;">&quot;990&quot;</span> <span style="color: #000066;">key</span>=<span style="color: #ff0000;">&quot;port&quot;</span><span style="color: #000000; font-weight: bold;">/&gt;</span></span><br />
<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;/detector<span style="color: #000000; font-weight: bold;">&gt;</span></span></span><br />
<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;detector</span> <span style="color: #000066;">class</span>=<span style="color: #ff0000;">&quot;org.opennms.netmgt.provision.detector.simple.ImapDetector&quot;</span> <span style="color: #000066;">name</span>=<span style="color: #ff0000;">&quot;IMAPS&quot;</span><span style="color: #000000; font-weight: bold;">&gt;</span></span><br />
&nbsp; &nbsp;<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;parameter</span> <span style="color: #000066;">value</span>=<span style="color: #ff0000;">&quot;993&quot;</span> <span style="color: #000066;">key</span>=<span style="color: #ff0000;">&quot;port&quot;</span><span style="color: #000000; font-weight: bold;">/&gt;</span></span><br />
<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;/detector<span style="color: #000000; font-weight: bold;">&gt;</span></span></span></div></div>
<p>4. Bei einigen Checks musste ich den LoopDetector verwenden. Wie z.B. hier:</p>
<div class="codecolorer-container xml geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="xml codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap"><span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;detector</span> <span style="color: #000066;">class</span>=<span style="color: #ff0000;">&quot;org.opennms.netmgt.provision.detector.loop.LoopDetector&quot;</span> <span style="color: #000066;">name</span>=<span style="color: #ff0000;">&quot;SIP-5061&quot;</span><span style="color: #000000; font-weight: bold;">&gt;</span></span><br />
&nbsp; &nbsp;<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;parameter</span> <span style="color: #000066;">value</span>=<span style="color: #ff0000;">&quot;true&quot;</span> <span style="color: #000066;">key</span>=<span style="color: #ff0000;">&quot;supported&quot;</span><span style="color: #000000; font-weight: bold;">/&gt;</span></span><br />
&nbsp; &nbsp;<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;parameter</span> <span style="color: #000066;">value</span>=<span style="color: #ff0000;">&quot;192.168.1.1&quot;</span> <span style="color: #000066;">key</span>=<span style="color: #ff0000;">&quot;ipMatch&quot;</span><span style="color: #000000; font-weight: bold;">/&gt;</span></span><br />
<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;/detector<span style="color: #000000; font-weight: bold;">&gt;</span></span></span></div></div>
]]></content:encoded>
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		<item>
		<title>FreeBSD &#8211; Software RAID &#8211; gmirror</title>
		<link>http://www.hemmler.net/freebsd-software-raid-gmirror/</link>
		<comments>http://www.hemmler.net/freebsd-software-raid-gmirror/#comments</comments>
		<pubDate>Thu, 19 Apr 2012 09:10:11 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[FreeBSD]]></category>
		<category><![CDATA[Serveradministration]]></category>
		<category><![CDATA[gmirror]]></category>
		<category><![CDATA[raid]]></category>

		<guid isPermaLink="false">http://www.hemmler.net/?p=497</guid>
		<description><![CDATA[Mit folgenden Befehlen wird unter FreeBSD ein Software-RAID eingerichtet: sysctl kern.geom.debugflags=16 gmirror label -v -b round-robin gm0 /dev/ad4 echo geom_mirror_load=&#34;YES&#34; &#62; /boot/loader.conf Dann die fstab etwas anpassen (doppelt kontrollieren): /dev/ad4s1a ersetzen gegen /dev/mirror/gm0s1a Dann das System rebooten. Anschließend kann die zweite Festplatte hinzugefügt werden: gmirror insert gm0 /dev/ad6 Bei FreeBSD 9 muss dieser Befehl verwendet [...]]]></description>
			<content:encoded><![CDATA[<p>Mit folgenden Befehlen wird unter FreeBSD ein Software-RAID eingerichtet:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">sysctl kern.geom.debugflags=<span style="color: #000000;">16</span><br />
<br />
gmirror label <span style="color: #660033;">-v</span> <span style="color: #660033;">-b</span> round-robin gm0 <span style="color: #000000; font-weight: bold;">/</span>dev<span style="color: #000000; font-weight: bold;">/</span>ad4<br />
<br />
<span style="color: #7a0874; font-weight: bold;">echo</span> <span style="color: #007800;">geom_mirror_load</span>=<span style="color: #ff0000;">&quot;YES&quot;</span> <span style="color: #000000; font-weight: bold;">&gt;</span> <span style="color: #000000; font-weight: bold;">/</span>boot<span style="color: #000000; font-weight: bold;">/</span>loader.conf</div></div>
<p>Dann die fstab etwas anpassen (doppelt kontrollieren):</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap"><span style="color: #000000; font-weight: bold;">/</span>dev<span style="color: #000000; font-weight: bold;">/</span>ad4s1a ersetzen gegen <span style="color: #000000; font-weight: bold;">/</span>dev<span style="color: #000000; font-weight: bold;">/</span>mirror<span style="color: #000000; font-weight: bold;">/</span>gm0s1a</div></div>
<p>Dann das System rebooten.</p>
<p>Anschließend kann die zweite Festplatte hinzugefügt werden:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">gmirror insert gm0 <span style="color: #000000; font-weight: bold;">/</span>dev<span style="color: #000000; font-weight: bold;">/</span>ad6</div></div>
<p>Bei FreeBSD 9 muss dieser Befehl verwendet werden:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">gmirror insert gm0 <span style="color: #000000; font-weight: bold;">/</span>dev<span style="color: #000000; font-weight: bold;">/</span>ada1 <span style="color: #7a0874; font-weight: bold;">&#40;</span>bei Freebsd <span style="color: #000000;">9</span><span style="color: #7a0874; font-weight: bold;">&#41;</span></div></div>
<p>Mit diesen Befehlen kann kontrolliert werden ob alles in Ordnung ist:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">gmirror list<br />
gmirror status</div></div>
<p>Für den Fall, das mal eine Festplatte kaputt geht und ausgetauscht werden muss, dann muss das RAID erst resettet werden. Dazu verwendet man folgenden Befehl:</p>
<div class="codecolorer-container bash geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="bash codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">gmirror forget gm0</div></div>
]]></content:encoded>
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		<item>
		<title>Webportal über Port 80 erreichen</title>
		<link>http://www.hemmler.net/webportal-ueber-port-80-erreichen/</link>
		<comments>http://www.hemmler.net/webportal-ueber-port-80-erreichen/#comments</comments>
		<pubDate>Wed, 18 Apr 2012 09:12:27 +0000</pubDate>
		<dc:creator>peter</dc:creator>
				<category><![CDATA[OpenNMS]]></category>

		<guid isPermaLink="false">http://www.hemmler.net/?p=481</guid>
		<description><![CDATA[Um das Webportal ohne die Angabe eines Ports erreichen zu können, kann man folgenden kleinen Hack verwenden. iptables -A PREROUTING -t nat -i eth0 -p tcp --destination-port 80 -j REDIRECT --to-port 8980 Alle Anfragen an Port 80 werden somit an den ONMS- Standart-Port weitergeleitet. Nach einem Neustart des Systems muss dies sofern es nicht anders [...]]]></description>
			<content:encoded><![CDATA[<p>Um das Webportal ohne die Angabe eines Ports erreichen zu können, kann man folgenden kleinen Hack verwenden.</p>
<div class="codecolorer-container text geshi" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="text codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">iptables -A PREROUTING -t nat -i eth0 -p tcp --destination-port 80 -j REDIRECT --to-port 8980</div></div>
<p>Alle Anfragen an Port 80 werden somit an den ONMS- Standart-Port weitergeleitet.</p>
<p>Nach einem Neustart des Systems muss dies sofern es nicht anders eingerichtet ist, wiederholt werden.</p>
<p>&nbsp;</p>
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