A few years ago, vendors said they could provide a variety of security features (Including Intrusion Prevention System functions and application control) on a device. Then we saw the next generation of firewalls emerging.In the current market research on the next generation firewall (NGFW), experts said that not every NGFW provides the functions that every enterprise wants, and, in some cases, too many features may not be a good thing.Gartner, an IT analysis company, released the magic Quadrant
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Consolidate wired and Wireless LAN Security start with logs and reports
Network engineers responsible for wireless and wired network security want their security event information to be unified rather than their security tools unified. They want a platform to collect different reports and use the same standard to present information views to analyze logs on firewalls and servers.
"A security incident management product can correlate these events to help companies see security vulnerabilitie
I. I will only talk about the most common types of projection: mocato projection, Gaussian-kerlenge projection, UTM projection, and lanbote"String 7
1. Mercator projection string 8
1.1 Introduction to mocato projection string 1
Mercator projection is an equivalent tangent cylindrical projection. gerhardus Mercator 1512-1594, a Dutch GIS scientist, was developed in 1569, assume that the Earth is enclosed in a hollow cylinder, and its standard weft is
I. I will only talk about the most common types of projection: mocato projection, Gaussian-kerlenge projection, UTM projection, and lanbote"
1. Mercator projection
1.1 Introduction to Mercator projectionGerhardus Mercator 1512-1594 was developed in 1569 as an equi-angular tangent cylindrical projection, in which the Earth was enclosed in a hollow cylinder, the standard weft is in tangent contact with the cylinder, and then it is assumed that there is
In the past two years, network attacks have frequently occurred, and are basically attacks from the application layer. However, most network security technologies and solutions are insufficient in this regard. In this field, users need security protection from the inside out, and some devices with higher throughput and higher intelligent security level gradually come in handy.
Once upon a time, when users talked about security, they had to do with the traditional three things: Firewall, anti-vir
1. IPV6 basic configuration 650) this. width = 650; "onclick = 'window. open (" http://blog.51cto.com/viewpic.php? Refimg = "+ this. src) 'onclick =" window. open ("http://blog.51cto.com/viewpic.php? Refimg = "+ this. src) "src = ".. /attachment/201103/161315293 .jpg" border = "0" alt = ""/> Note: PC1 and PC2 are both XP dual-protocol stack systems, but the environment only uses the IPV6 address UTM1, UTM2 is a linux dual-protocol stack system with multiple NICs. In this environment, only IPV6 a
positive in the northern hemisphere, negative in the southern hemisphere, and Y values are positive east of the central Meridian and negative to the West. I am over in the Northern hemisphere, the X value is all positive, in order to avoid negative values of Y, but also the x-axis to move westward 500km.2) The plane rectangular coordinate (FANGRI) NET stipulation3) geographical coordinates (latitude and longitude) net stipulation4) adjacent belt supplementary Coordinate network and its regulati
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Bypass with Transfer-Encoding and Content-Length
The HTTP 1.1 Standard clearly stipulates that if the Content-Length and Transfer-Encoding multipart modes are provided at the same time, the transmission mode used is multipart transmission, the Content-Length field must be ignored. All browsers follow this principle, but 15% of firewalls are still resolved in the opposite way. Therefore, you can use this simple technique to bypass this type of Firewall:
HTTP/1.1200okTransfer-Encoding:chunkedCon
point. Therefore, before the Y-value, it needs to be labeled with a band number, and such coordinates are called universal coordinates.Comparison of 3.2 Gauss G Gauss–krüger projection with UTM projectionThe UTM projection, called Universal Transverse mercatol PROJECTION (Universal Transverse Mercator), is a "conformal transverse cylindrical projection", which cuts the Earth at 80 degrees south latitude, 8
, codered, and bugbear.
2. Attacks on new vulnerabilities are now being generated much faster than before. It is particularly important to prevent new and unknown threats, known as "0 Hours" (zero-hour) or "0" (zero-day).
3, with social engineering trap elements of attacks, including spyware, network fraud, mail-based attacks and malicious Web sites, such as the number of significant increases. Attackers spoof legitimate application and messaging information to deceive users into running them.
, security control and security management functions, includes Security Audit, tracking, alarm and key management, and VPN.
The security router is mainly used in the network center of small and medium-sized enterprises. It undertakes the main routing functions while taking into account network security. However, the overall network performance of the entire device cannot be degraded due to security functions. That is to say, security is an auxiliary function of the security router. In small and
deploy the firewall in the network. However, in the networks of large enterprises, firewalls and Security routers play a different role in routing and security functions. What should they do if they correspond to professional firewalls in addition to secure routing, as well as software firewalls, UTM, and other products?
The Software Firewall runs on a specific computer and needs the support of the computer operating system pre-installed by the custo
) Gaussian-gram projection and UTM projection
Some foreign software, such as ARC/INFO or supporting software of foreign instruments, such as multi-beam data processing software, often does not support Gaussian-gram projection, but supports UTM projection, therefore, the UTM projection coordinates are often submitted as Gaussian-gram projection coordinates.
axes is the coordinate origin of each belt. The ordinate coordinates start from zero in the equator. The north of the equator is positive, and the south is negative. China is located in the northern hemisphere, and the ordinate values are positive. If the x-axis starts from zero in the central longitude line, the East of the central longitude line is positive, the West is negative, and the X-axis has a negative value. Therefore, it is inconvenient to use the x-axis to move 500 kilometers west a
spelling competition organized by local confectionery companies, and this kind of perseverance has become an important footnote in his life.In high school, Gartner once liked music and hoped to develop in this field. But after he enrolled at Case Science University, his passion for music was replaced by an IBM 650 computer. He seems to have a hunch on programming and arithmetic, and this intuition is laid out by a lot of math exercises. Soon, he beca
is a conformal projection that minimizes distortion along a North-SouthLine, but does not maintain true directions.
Universal Transverse Mercator (UTM)-based on a Transverse MercatorProjection centered in the middle of zones that are 6 degrees in longpollingWide. These zones have been createdThroughout the world.
Lambert conformalConic-a conic, confromal projection typicallyIntersecting parallels of latitude, standard parallels, in the northe
How enterprises consider their network protection devices
In addition to powerful routers (such as Cisco, Huawei, and 3Com), most of the companies that are willing to invest in it have security devices such as UTM, IPS, and Web security gateway. Of course, we must not forget the common firewall that has been working hard for a long time (non-integrated security gateway ). Today, we will talk about the considerations of network protection solutions
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Recall that the professional contact with remote sensing for several years, and now more and more deviated from remote sensing, suddenly thinking of their own brain in the remote sensing knowledge to sort out. The first thought is the coordinate system and projection, I think this thing bothers more than 80% of surveying, remote sensing and GIS practitioners in the field, the group often asked, I was also very confused, what Earth coordinate system
Looking back, I have been in touch with remote sensing for several years, and now I am moving away from remote sensing. I suddenly want to sort out the remote sensing knowledge in my mind. The first thing that comes to mind is the coordinate system and projection. I think this is bothering more than 80% of practitioners in the field of surveying, remote sensing, and GIS. People in this group often ask me that I was also confused, what earth coordinate system, Earth coordinate system, Gaussian pr
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