A new record for live streaming traffic: Trump's inauguration on January 20, 2017, which not only represented the inauguration of a new US president, but also set an amazing new Internet record. The Akamai-supported live video traffic of the inauguration reached its peak
The writing of shell script and regular expression: first, the basic of shell script: 1. First of all, what exactly is the shell script? 1) plain text document-the data stored in the file is stored in characters; 2) A large number of commands to solve user problems according to the needs of users
The background of the problem is as follows: 1, the public network of the company's intranet to a computer room is not accessible (ping,traceroute,curl is not allowed), and the machines of this public network are not connected to the company's intranet in a computer room (ping,traceroute,curl is not allowed) 3, but a computer room is public.
Recently, we have been working hard to develop anti-disclosure solutions for the industry, and to do source code encryption and anti-disclosure solutions. So far, we have learned and implemented a lot of projects. To sum up, the industry has the following characteristics: 1. The level of software developers is relatively high. First of all, it is not easy to crack; 2. Anti-monitoring, anti-encryption,
OSSIM system startup fault handling method 1. Background OSSIM is a system based on Debian Squeeze 6. Behind its strong processing power, its system is also relatively fragile and can not withstand serious accidental operations such as accidental power outage and illegal shutdown. Do this in the right system.
OSPF and ACL are widely used in enterprises. This paper focuses on the examples of ospf and acl. The enterprise topology diagram of this example is as follows: project case requirements: 1. The intranet runs the OSPF routing protocol, and the area planning is shown in the figure. 2. The region where finance and R & D are located
Starting from each development language, this paper expounds the encryption method from the point of view of each development language. This article mainly talks about the encryption methods of lua, erlang, perl and ruby languages. Required for encryption: the latest version of Virbox LM SDK Virbox Protect
Triggers are divided into three types by type: 1. DML triggers, which are triggered when data changes; 2. DDL triggers, which are triggered when database-level or instance-level objects are modified; 3. Login triggers, which are triggered when users log in; the most common are DML triggers, DML triggers
In the network, we usually do not need to capture all the packets, we often only need to capture the packets we want, such as: we only need to capture tcp packets or arp packets and so on. When we only need to capture tcp packets, do not select st after selecting the network connection (network card).
The operation of ARP binding on Cisco network devices is as follows: view ARP cache: R5#show arpProtocol Address Age (min) Hardware Addr Type InterfaceIn
Experimental network structure diagram: DNS Server- (outside) ASA-Firewall (inside)-LAN Client | DMZ-WEB-Server-
VTI = Virtual Tunnel Interface advantages: support IP Multicast, dynamic routing protocols. VTI saves 4 bytes of GRE header than GRE OVER IPSEC and can carry more data. Restrictions: only IP unicast and multicast are supported
System administrators often need to log in to the linux server remotely, sometimes they need to run some tasks that take a long time to complete, and they have to wait until the task is completed before they can be disconnected, but sometimes they are accidentally disconnected and all previous efforts are wasted. So when you run some of the larger tasks, use the
A few days ago, I used the software to change the size of the D disk, and after a long time to complete, I was prompted to restart the computer. After rebooting, I entered the system and found that D disk was getting bigger, but E disk was gone. What's going on? can it be recovered?
Recently, more and more individual webmasters, after hearing the website for the record, feel very troublesome and ask to use Hong Kong space. Someone came to ask Lao Wang that Lao Wang could not clearly inform him of the specific process of filing and what he needed to prepare. Now take the time to sort out what is needed for the filing of a domestic website, which can be regarded as the most
In the php language, how numeric characters and numbers participate in the operation will be determined on a case-by-case basis, for example, echo "3-4-5"; the result: 3-4-5. Because it is regarded as a string. When echo 1-4-2 + "3-4-5", the
An overview of a protocol in a network based on TCP/IP protocol, a route must be specified in order to ensure communication between devices that are not physically connected directly. At present, there are two commonly used methods to specify routes: one is to learn dynamically through routing protocols (such as internal routing protocols RIP and OSPF); the other
The process names of some applications may be Chinese, and the directories created by some applications can also be Chinese. There is no way to input Chinese process names on SSH using debugserver, and there is no way to operate Chinese directories on SSH. Some methods have been tried on the Internet, but
Wikipedia is a very useful query tool for living in China how to use the following methods: environment: window browser recommendation: chrome1. Plug-ins: using the wikiwand plug-in Wikiwand is a way to change the Wikipedia entry interface
1. Iptables command iptables command is a commonly used firewall software on Linux, which is a part of netfilter project. It can be configured directly or through many front-end and graphical interfaces. 2. Iptables's "four tables and five chains:" four watch bags
