为了那座You know what的墙，我购买的是基于OpenVPN的方案，在PC上是相当的方便，也比较可靠。但是一直对移动设备如何使用VPN感到为难，因为不管是iPhone还是Android对OpenVPN的支持都很糟糕，更别提S60了。路由器刷OpenWRT又颇为麻烦，对硬件要求严格，耗不起时间钻研。如今将Windows 7变为Wifi AP，直接共享OpenVPN的TAP适配器，移动设备只要能用WiFi就畅通无阻了。 方法见下面的链接：Bink.nu | COOL: Windows 7 as an WiFi AccessPoint updated – Bink.nu.

What is checksum offloading From http://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html The checksum calculation might be done by the network driver, protocol driver or even in hardware. For example: The Ethernet transmitting hardware calculates the Ethernet CRC32 checksum and the receiving hardware validates this checksum. If the received checksum is wrong Wireshark won’t even see the packet, as the Ethernet [...]

Almost no pre-existing instructions on this issue works on Fedora Core 8. Now here is how you can do this with FC8 to disable IPv6: Append the following line to /etc/modprobe.conf: install ipv6 /bin/true Append the following line to /etc/sysconfig/network: NETWORKING_IPV6=no Ensure your network adapter is configured not to use IPv6. This is an easy [...]

Introduction Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and can sniff 802.11b, 802.11a, 802.11n, and 802.11g traffic (devices and drivers permitting). Kismet identifies networks by passively collecting packets and detecting standard named networks, detecting (and given [...]

I have been reading this book for a couple weeks, finding its clear presentation especially helpful. Read this book if you want to understand the technologies behind your SOHO wireless router – the device you might be using when reading this post. O’Reilly Media | 802.11 Wireless Networks: The Definitive Guide