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	<title>Fly Zone &#187; ping</title>
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	<link>http://flyxj.cn</link>
	<description>Do not, for one repulse, give up the purpose that you resolved to effect.</description>
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		<title>Windows上循环Ping的批处理代码</title>
		<link>http://flyxj.cn/archives/windows-bat-for-cycle-ping</link>
		<comments>http://flyxj.cn/archives/windows-bat-for-cycle-ping#comments</comments>
		<pubDate>Wed, 16 Mar 2011 07:39:38 +0000</pubDate>
		<dc:creator>flyxj</dc:creator>
				<category><![CDATA[System]]></category>
		<category><![CDATA[bat]]></category>
		<category><![CDATA[ping]]></category>
		<category><![CDATA[ssh]]></category>
		<category><![CDATA[windows]]></category>

		<guid isPermaLink="false">http://flyxj.cn/?p=450</guid>
		<description><![CDATA[最近受日本地震影响，连接SSH服务器非常的不稳定（为什么要买SSH，你懂得）。SSH服务商将我的账号升级成一号通，可以在多个服务器上登陆，也可以选择最快的来登录，于是就有了下面的Windows下的批处理代码，可以循环测试多个域名或IP的连通性，选择最佳的，域名改成你想测试的地址，把下面的代码保存到记事本中，并以后缀.bat结尾，很方便。 这让我想到了之前写的一篇关于Cisco IOS中使用Tcl脚本快速测试连通性文章。 批处理代码： :lop ( cls ping flyxj.cn ping flyxj.cn ping flyxj.cn pause ) goto lop]]></description>
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		<title>在Cisco IOS上使用Tcl Script</title>
		<link>http://flyxj.cn/archives/use-tcl-script-on-cisco-ios</link>
		<comments>http://flyxj.cn/archives/use-tcl-script-on-cisco-ios#comments</comments>
		<pubDate>Mon, 14 Mar 2011 06:51:29 +0000</pubDate>
		<dc:creator>flyxj</dc:creator>
				<category><![CDATA[Network]]></category>
		<category><![CDATA[cisco]]></category>
		<category><![CDATA[eem]]></category>
		<category><![CDATA[ios]]></category>
		<category><![CDATA[ping]]></category>
		<category><![CDATA[script]]></category>
		<category><![CDATA[tcl]]></category>

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		<description><![CDATA[Tcl (Tool Command Language) is a very powerful but easy to learn dynamic programming language, suitable for a very wide range of uses, including web and desktop applications, networking, administration, testing and many more. Open source and business-friendly, Tcl is a mature yet evolving language that is truly cross platform, easily deployed and highly extensible.&#8211;摘自Tcl官网 [...]]]></description>
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		<title>Ping返回结果U.U.U</title>
		<link>http://flyxj.cn/archives/ping-return-result-u-u-u</link>
		<comments>http://flyxj.cn/archives/ping-return-result-u-u-u#comments</comments>
		<pubDate>Fri, 11 Feb 2011 03:18:29 +0000</pubDate>
		<dc:creator>flyxj</dc:creator>
				<category><![CDATA[Network]]></category>
		<category><![CDATA[cisco]]></category>
		<category><![CDATA[icmp]]></category>
		<category><![CDATA[ping]]></category>

		<guid isPermaLink="false">http://flyxj.cn/?p=269</guid>
		<description><![CDATA[Cisco设备上使用Ping命令的时候经常出现U.U.U，是路由器返回的ICMP不可达信息（可参考Ping命令的返回结果）。 R2#ping 172.16.2.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.2.2, timeout is 2 seconds: U.U.U Success rate is 0 percent (0/5) 理论上应该是UUUUU，为什么会出现U.U.U呢？ 原来Cisco IOS默认为了防止ICMP洪泛攻击，开启了命令ip icmp rate-limit unreachable，将其关闭就能看到UUUUU，而且速度很快。 注意路由器序号 R1(config)#no ip icmp rate-limit ? unreachable ICMP type 3, Destination Unreachable R2#ping 172.16.2.2 Type escape sequence to abort. Sending 5, 100-byte ICMP [...]]]></description>
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		<title>Ping Spoofing</title>
		<link>http://flyxj.cn/archives/ping-spoofing</link>
		<comments>http://flyxj.cn/archives/ping-spoofing#comments</comments>
		<pubDate>Wed, 09 Jun 2010 15:51:44 +0000</pubDate>
		<dc:creator>flyxj</dc:creator>
				<category><![CDATA[Network]]></category>
		<category><![CDATA[attacker]]></category>
		<category><![CDATA[broadcast]]></category>
		<category><![CDATA[cisco]]></category>
		<category><![CDATA[icmp]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[ping]]></category>
		<category><![CDATA[spoof]]></category>

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		<description><![CDATA[“定向广播”特指 IP 主机位全为 1 的数据包，路由器不转发全网广播（255.255.255.255），但是思科路由器可以转发定向广播，只是默认不转发而已，使用 ip directed-broadcast 接口命令来实现转发定向广播。 我们来利用这一特性，在 Linux 下实现 Ping Spoofing 的攻击。 环境为 BT4 + GNS3，R1、R2 和 R3 模拟 PC，不要使用 VPCs，或 Windows 主机实验，因为 Windows 系统上的 ping 程序不对多个回应进行解包，收到第一个回应包以后就丢弃后面的，同样 Windows 的系统默认也不回应广播地址的包。 Attacker 使用 BT4，IP 地址为 192.168.10.1，网关为 192.168.10.254；R0 四个接口地址为 e0/0 为 192.168.30.254；e0/1 为 192.168.10.254；e0/2 为 192.168..20.254；R1 的 e0/0 为192.168.20.1；R2 的 e0/0 为 192.168.20.2；R3 的 e0/0 为 [...]]]></description>
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		<title>Ping命令的返回结果</title>
		<link>http://flyxj.cn/archives/ping-return-results</link>
		<comments>http://flyxj.cn/archives/ping-return-results#comments</comments>
		<pubDate>Mon, 15 Mar 2010 09:20:40 +0000</pubDate>
		<dc:creator>flyxj</dc:creator>
				<category><![CDATA[Network]]></category>
		<category><![CDATA[cisco]]></category>
		<category><![CDATA[icmp]]></category>
		<category><![CDATA[ping]]></category>

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		<description><![CDATA[思科设备上的ping命令的返回结果： ! Each exclamation point indicates receipt of a reply . Each period indicates the network server timed out while waiting for a reply U A destination unreachable error PDU was received Q Source quench (destination too busy) M Could not fragment ? Unknown packet type &#38; Packet lifetime exceeded]]></description>
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