scenario: P1 and P2 are located on each selfish network, each with its own NAT/FW, And the NAT/FW deployed by the ISP exists, this is a typical multi-layer NAT/FW situation. NA and NB indicate the NAT/FW of P1 and P2 respectively, and NC indicates the NAT/FW of ISP. In this case, for P1 and P2, there are three different IP addresses and ports. See table 1.Table 1 three different IP addresses/ports of P1 and P2IP address/port \ node P1, P2 P1 P2Private Network Address/port 10.0.0.1: 4321 10.1.1.
Socket Communication Process
Define variable -- get Winsock version -- load Winsock database -- initialize -- create socket -- set socket options -- close socket -- uninstall Winsock database -- release all resourcesThe entire program architecture is divided into two parts: the Server Client.Server socket program processSocket () → BIND () → listen → accept () → Recv ()/send () → closesocket ()Client:Socket → connect () → send ()/Recv () → closesocket ()Server code:# Include # Pragma co
Take the Cisco 2950 vswitch as an example. log on to the vswitch and enter the management password to enter the configuration mode. Then, run the following command:
Switch # config Terminal
# Enter the Configuration Mode
Switch (config) # interface fastethernet 0/1
# Enter the specific port configuration mode
Switch (config-If) # switchport port-secruity
# Configure port security mode
Switch (config-If) switchport port-security Mac-address MAC (MAC address of the host)
(Config-If) No switchport
security level, the security of Cisco routers is not higher than that of soft routers. Cisco uses Nat in the pix, which is basically the same as using NAT in its own IOS. Even so, Cisco routers are doing well in resisting DoS attacks, mainly because Cisco's IOS is not only an operating system, but also a routing/security software. This integration method is not only more concise than the software routing products that work on windows, but also enables fast updates whenever Cisco discovers a new
you still concerned about these things?Me: I often read some work books. Because my friends in my teenage years are on the assembly line and go back every year for the Chinese New Year, I hope I can have more common languages with them and understand their lives.Interviewer: Well, what is your expected monthly salary? Before tax? Don't eat.A: 4500 to 5500B: 3800 to 4500C: 4500 to 5500
Me: 4000 to
How to take up the rounding up to 500 increments
Conditions:
With 500 progression,
Rule: If it is now 4200, then automatically make it 4500, if it is now 4700, then become 5000;4500 or 5000 this same, please
------to solve the idea----------------------
$d = Array (4200, 4700, 5000, 4500);foreach ($d as $v) { printf ("%d:%d\n", $v, Ceil ($v/500) *500);}
4,200:4,5004,700:5,0005,000:5,0004,500:4,500
----
IntroducedWe have developed a tax calculator, after entering the salary, printing the tax payable.A tax calculation formula:
Taxable income = Salary amount-Various social insurance costs-starting point (3500 yuan)
Taxable amount = Taxable income x tax Rate-Calculator deduction
Each of the social insurance costs we set in this procedure is 0, do not consider.The tax rate and the Calculator deduction number corresponding table:
Taxable
Income amount
Tax r
denied.RootBinDaemonAdmLpSyncShutdownHaltMailNewsUucpoperatorGamesNobodyThis means: The default is to deny the user name under this file, and /etc/vsftpd/ftpusers the user in this file is also rejected!So root is not logged in.can also be added in the configuration file:userlist_deny=no1.userlist_deny=no so the user name in the user_list is allowed,But the /etc/vsftpd/ftpusers is still forbidden.The 2./etc/vsftpd/ftpusers file is controlled by this configuration file: vim/etc/pam.d/vsftpdSpeci
This paper mainly explains the process of estimating the current scene temperature in the white balance algorithm.The principle of color temperature calculation is not complicated, but to do well, or to do a good job of every step, this requires a lot of testing, and the algorithm is constantly improved.First, let's talk about the process briefly:1. Take a frame of image data and divide it into MXN blocks, assuming it is 25x25, and count the basic information of each block (the number of white p
semicolon (;), and \ r \ n means to enter a return line.
We have solved the PHP code start, terminator and code variable flags and equations, and other input problems, can now be specific to the production of the. php file operation. To make the program look like, we preset the contents of the. php file that is about to be generated: username (Dark Horse), login password (blackhorse), age (28), Revenue (4500). Here is the complete code to generate t
(SALARY) over () as full average wage from employ; The results of the query are as follows: Ordinal department ordinal name Department salary department average wage total salary 1 1 Zhang three marketing department 4000 4500 4000 2 2 Dick Marketing Department 5000 4500 4000 3 3 Harry Marketing department (NULL) 4500 4000 4 1 Zhaohong Tec
Calculation of level seven tax
Problem description: As of September 1, 2011, China's adjusted personal income tax collection method, starting point for 3500 yuan,
The excess portion is calculated at level 7 below:
1 over 0 to 1500 tax rate 3% calculating quickly deduction number 0
2 part of the tax rate of more than 1500 to 4500 yuan 10% calculating quickly deduction number 105
3 part of the tax rate of more than
)
# Remove the MAC address of the binding host
Attention:
The above command sets a port on the switch to bind a specific MAC address. So only this host can use the network, if the host's network card has been replaced or other PCs want to use the network through this port is not available, unless you delete or modify the port binding on the MAC address to normal use.
Attention:
The above functions apply to Cisco 2950, 3550, 4500, 6500 series Swit
= salary * 1.15WHERE salary >= andSalary This example, in fact, is very easy to see the problem, because the execution of these two conditional statements is separate operation, so there will be jitter, that is, after the first condition is executed, his salary becomes the condition that meets the second condition, it will be modified again.For example, the wages of passers-by IS 5000, after the first modification, it becomes 4500, it is clear that t
Preparing the Catalyst 4500 switch for CNAThe switch restores the factory default restore command
Switch>enable
Switch#erase Startup-configSwitch#reload
To enable the switch to be managed by CNA, you must have the following two conditions: the IP address of the network management.Configuring IP for G1/1 ports
Switch#configureSwitch (config) #interface gigabitethernet 1/1Switch (config-if) #no SwitchportSwitch (config-if) #ip
provides the Execute immediate statement to Execute dynamic SQL statements. The syntax is as follows:Copy codeThe Code is as follows:Excute immediate dynamic SQL statement using binding parameter list returning into output parameter list; this statement is described as follows: 1) dynamic SQL refers to DDL and uncertain DML (that is, DML with parameters)2) The bound parameter list is the input parameter list, that is, the type is in, and the parameters in the runtime and dynamic SQL statements
Hard-coded credential authentication bypass vulnerability in multiple Datum Systems products
Release date:Updated on:
Affected Systems:Datum Systems PSM-4500Datum Systems PSM-500Description:--------------------------------------------------------------------------------Bugtraq id: 68514CVE (CAN) ID: CVE-2014-2951Datum Systems PSM-4500 and PSM-500 are satellite modem series devices.The Datum Systems PSM-4500
/100 Ethernet power ports, 252 Ethernet 10/100/1000 ports, or 9 10 Gigabit Ethernet ports. The integrated POE (802.3af) supports 240 port 10/100 or 240 port 10/100/1000.
Cisco smart switch: Catalyst 4500 intermediate modular Chassis
Catalyst 4500 with Supervisor Engine V. It is suitable for deployment of backbone networks, distribution layers, and service providers of small enterprises. Provides management
Linux source code tree-Linux general technology-Linux programming and kernel information. The following is a detailed description. Linux is used to support the source code of various architectures. It contains about 4500 C language programs and is stored in around 270 subdirectories. It contains about 2 million lines of code in total, which occupies about MB of disk space.
Source code is in the directory:/usr/src/linux (in most linux releases)
Linux
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