A web based tool to test GFW of China

-
Well, this is a quite useful tool for web masters like me, especially when the major audiences are from China.

Comments

Post a Comment

Popular posts from this blog

Force to delete SharePoint items

-
“This item cannot be deleted because it is still referenced by other pages” When you see this message when you are trying to delete MasterPage or Page Layout, use SharePoint Designer to create a new folder and move the locked item to it and then delete the folder in whole. It's the simplest work around to "unlock" the bizarre dead lock.
Read more

Ubuntu upgrade

-
Ubuntu upgrade from 8.10 to 9.04 was very successful and straightforward. Everything started normally except VMWare. When I run VMWare on console it returns: $ vmware Logging to /tmp/vmware-ubuntu/setup-15021.log modinfo: could not find module vmmon modinfo: could not find module vmnet modinfo: could not find module vmblock modinfo: could not find module vmci modinfo: could not find module vsock modinfo: could not find module vmmon modinfo: could not find module vmnet modinfo: could not find module vmblock modinfo: could not find module vmci modinfo: could not find module vsock Segmentation fault I thought it was the same problem as before when the kernel is updated. So I ran the setup program again with root account. The bundle program uninstalled and reinstalled VMWare for me. However the result was the same, it didn't solve the problem. After research on Internet I found the following solution that worked for me: sudo mv /usr/lib/vmware/modules/binary /usr/lib/vmware/modules/bin...
Read more

Use reverse ssh tunnel to access remote machines behind NAT

-
Image
If you have ever connected to your cooperate network using VPN you may understand the complexity of the tools and configurations IT engineers must deal with. In Windows world, it's true. To do anything that looks complicated there's always some software available, to make simple tasks over complicated. Say if you want to access your home Linux machine from your office. Both are behind firewall and use NAT. You don't have permission to change firewall settings. We see this a very common scenario in today's world. We don't need VPN or any software to connect to home machine (A). What we need is a machine (B) at middle and through B we can connect to A with ssh connection from the machine (C) you are working on. This is the easiest solution I found so far. No need for VPN, expensive software, configuration, ... all you need is ssh. ssh has a very useful parameter -R. This tells ssh server at remote (B) will forward the given port number to itself (A). For more deta...
Read more