upstream isp

installation, and family users generally have no conditions to set up them themselves. Iii. FTTH access deployment plan In terms of specific functions, the OLT is placed at the ISP center to control the connection, management, and maintenance of the channel. The maximum transmission distance between the OLT and The ONU can reach 10-20km. The OLT has a set of ranging functions to test the logical distance between each ONU and the OLT, and then directs

A Broadband Router is one of the most commonly used routes and has a large market demand. Here we will mainly explain that FTTH is the best choice for fiber-optic direct access to the home, including the current broadband routers that can perfectly support FTTH access solutions. As copper prices keep rising and the cost of optical cables keep decreasing, fiber-to-household (FTTH) services that provide bandwidth much higher than metal wire access are becoming the focus of

application-tier DDoS attacks, which are often not discovered by detection solutions deployed to monitor large ISP networks that host dozens of or kilometers of gigabit traffic. DDoS detection and mitigation solutions located at the data center boundaries should be able to provide packet-based detection capabilities that provide immediate protection against a wide range of DDoS attacks; however, ISP/MSSP

Fully understand the FTTH technical standards and Home Networking, master the following FTTH technical standards knowledge, you will be more easily choose your preferred method to do a good job of FTTH technical standards. Many methods will make you suddenly enlightened. As copper prices keep rising and the cost of optical cables keep decreasing, fiber-to-household (FTTH) services that provide bandwidth much higher than metal wire access are becoming the focus of

bandwidth is used for download, the borrowed group cannot be returned until the download ends. If you need to restrict this P2P software, it is not recommended that you allow external lending and borrow bandwidth. We recommend that you use it with the Intranet host speed limit (when your total bandwidth is less than 7 Mbps ). Note: After bandwidth management is enabled, the L3 switch function cannot be used at the same time. Instance: Use the bandwidth service in the "bandwidth service" to limi

1. Introduction to the LogThere are two main types of Nginx logs: Access logs and error logs. The access log mainly records each request that the client accesses Nginx, the format can be customized; the error log mainly records the log when the client accesses Nginx error, and the format does not support customization. Both types of logs can be selectively closed.Through the access log, you can get the user's geographical source, jump source, use terminal, a URL to visit the amount of relevant i

The computer almost became the family, the company essential tool, everywhere can see its figure. But the computer is not like ordinary household appliances that can withstand the toss, it looks more delicate, more prone to malfunction.our front-end server is the use of tomcat software, recently often appear 502 Badgateway error, every time I was restarted Tomcat service to solve, I ask you have encountered this situation, Obviously, this error is mainly the internal environment parameter of the

process, and of course VLAN planning must be coordinated across two-tier devices and BAS. 　　when BAS receives the upstream PPPoE packet, it first identifies the category of the VLAN ID, and if it is a regular dial-up user, it determines whether it is a discovery phase or a session-time packet, and is processed strictly in accordance with the PPPoE protocol. At the session stage, the IP address is assigned to the user from different address pools acco

speed. And Zhang boss is using fiber access, upload download speed is equivalent. So Lee boss Broadband upload speed than download slow is normal phenomenon.Question two: Why is the upload speed of ADSL only 1/8 download speed?ADSL (Asymmetric digital subscriber line, asymmetric subscriber loop) is a type of network access. It is called an asymmetric digital subscriber line loop because of an asymmetric uplink and downlink bandwidth. In the early days, telephone lines were used as ADSL line med

Type: Single-Chip Microcomputer 29 people read comments Directory (?) [+]Note: Programming Software for ISP and STC single-chip microcomputer; IAP, CTC Single-chip Computer-solidified burning software;1. Guide code ISP: 7f 7f 7f 7f 7f The ISP keeps sending 0x7f until it receives the IAP Reply frame; IAP: 68 00 39 00 09 7A 7A 09 7A 09 76 09 7A 09 09 7A 09 7A 38 43

　　First, 502 bad gateway meaning 502 Bad Gateway English translates into 502 types of errors or invalid gateways, where 502 refers to the error type code. 　　Second, produce 502 bad Gateway error reason There are many reasons for the 502 bad Gateway, in essence, we connect the server to the server to send a request failed, it is possible that the server is currently too many links, causing the server can not give the normal response, resulting in such an error, but also may be the server conne

Many large sites, ngixn often as a reverse proxy sever load upstream Web server with high availability mechanism to build a large Web cluster, and to build such a cluster through nginx, it is inevitable that the nginx a very important module: Load Balancer module ( Upstream), as shown below is an introduction to the Nginx Load balancer configuration.1.1 Upstream

Nginx reverse proxy and Server Load balancer I. Introduction Reverse Proxy(Reverse Proxy) means to use a Proxy server to accept connection requests on the internet, and then forward the requests to the server on the internal network, return the result obtained from the server to the Client Requesting connection from the internet. The proxy server is displayed as a server. Reverse Proxy Load Balancing TechnologyIt is to dynamically forward connection requests from the internet to multiple servers

architecture allows developers to extend the functionality of the Web server without the need to modify the Nginx core. Nginx modules can be divided into: Core, event module, stage processor, protocol, variable processor, filter, upstream and load balancer, etc. at present, Nginx does not support dynamic loading module, that is, the module code is compiled with the Nginx core code. module dynamic loading and ABI has been planned for development in a

use BGP protocol to achieve multi-line interconnection with their own as numbers. This solution is used to achieve multi-line interconnection. IDC needs to be in the CNNIC (China Internet Information Center) or APNIC (Asia Pacific Network Information Center) apply for your own IP address segment and as number (currently, chinanetcenter is also a member organization of APNIC and CNNIC), and then broadcast the IP address segment to the networks of other network operators through the BGP protocol.

photography, but also has a very beautiful artistic sense, which is called depth of life. The larger the aperture, the smaller the depth of the scene, the more remarkable the effect of the set. Therefore, when we choose to buy a camera phone, we should first choose a larger aperture of the product. Nowadays, most of the mobile phones in the shopping malls are f2.4, f/2.2 or f2.0, while the iris of Lenovo Vibe Z arrives at f1.8, the largest cell phone of the aperture today. (Figure 11)Lenovo Vib

Use Merge and Rebase in Git to synchronize code with open-source projects, gitrebase There are two main working modes for open-source project-based development. Mode 1 is to pull a branch from an open-source project, develop a new feature in this branch, and merge it into upstream. Applicable to developers who are open-source projects. Mode 2 develops independently after pulling branches from open-source projects, but regularly pulls updates from

This article mainly introduces the related functions of Nginx Plus, which spans the various versions of Nginx plus R5/R6/R7/R9. The more advanced usage of Nginx reverse proxy and load balancing is involved. Mainly include: HTTP load balancer, HTTP long connection, TCP and UDP load balancing, upstream connection limit, the shortest time Equalization algorithm, session consistency, real-time health check, DNS re-resolution, access control, client connec

does not existReason: PPPoE is not fully and correctly installedSolution: Uninstall any PPPoE software, reinstall Error 609 The device type does not existProblem: Dial-up network-connected devices whose types are not determinedReason: PPPoE is not fully and correctly installedSolution: Uninstall any PPPoE software, reinstall Error 611 The route is isn't available/612 the route is not allocatedProblem: dial-up Networking network connection routing is incorrectReason: PPPoE is not fully an

line. First, we intercept attacks on the vro. Quickly set a filter rule for the vro. Because the source address sources are random, they think it is difficult to restrict an address or a range of addresses to prevent attacks, so they decided to prohibit all UDP packets sent to 192.168.0.175. This will cause the server to lose some features, such as DNS, but at least make the Web server work normally. The initial temporary DOS access control list (ACL) of the router) Access-list 121 remark Tempo