dns traversal

Dnspython is a Python-implemented DNS toolkit that supports almost all record types.can be used to query, transmit, and dynamically update zone information, while supporting Tsig (transactional signature) authentication messages and EDNS0 (extended

  I. Nat encyclopedia content: NAT (Network Address Translation) is a conversion technology that converts private (retained) addresses into valid IP addresses. It not only perfectly solves the problem of insufficient lpv4 addresses, it can also

Firewall&nat In fact, the essence of the light-mouth board is equivalent to NAT device. To achieve NAT penetration, there is no problem with the SIP processing of the optical orifice plate. Firewall is a passive network security defense technology,

Since the advent of the World Wide Web in 1994, the number of Web pages on the Internet has grown exponentially, with hundreds of billions of pages on the internet so far in just more than 20 years. How do I search this huge web page to download

Http://developer.yahoo.com/performance/rules.html Yahoo! The predictional performance team brings best practices to improve web performance. They conducted a series of experiments, developed various tools, wrote a lot of articles and blogs, and

Yahoo! The predictional performance team brings best practices to improve web performance. They conducted a series of experiments, developed various tools, wrote a lot of articles and blogs, and participated in discussions at various meetings. The

1. Minimize the number of HTTP requests80% of the end user response time is used to download various content. This part of Time includes images, style sheets, scripts, and Flash on the download page. You can reduce the number of HTTP requests by

Yahoo! The predictional performance team brings best practices to improve web performance. They conducted a series of experiments, developed various tools, and wrote a lotArticleAnd blogs and participate in discussions at various meetings. The core

Analysis of the working principle of DDNSDDNS implementation of the most fundamental point is that when the host IP address changes, the implementation of DNS mapping information in a timely manner, the application needs to obtain this information

From the 07 of the Estonian DDoS information war, to this year Guangxi Nanning 30 internet cafes suffered from DDoS ransomware, and then to the Sina network suffered a DDoS attack can not provide external services for more than 500 minutes. DDoS