The use of TCP hidden channels to bypass the firewall-vulnerability warning-the black bar safety net

From:http://www. oioj. net/ my home ISP a free personal home page service, in the days that followed, I often passed 3 3 8 9 Port to log in, constantly to the IT patch patch the vulnerability, do some management and maintenance, own also grow a lot of knowledge. Recently delving intonetworksecuri...