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] ~]# lsof -i:80 COMMAND PID USER FD TYPE DEVICE size/off NODE NAME httpd 31239 root 3u IPv4 31675 0t0 TCP Localhost.lo Caldomain:http (LISTEN) httpd 31240 daemon 3u IPv4 31675 0t0 TCP localhost.localdomain:http (LISTEN) httpd 31241 Dae Mon 3u IPv4 31675 0t0 tcp localhost.localdomain:http (LISTEN) httpd 31242 daemon 3u
Syntax: open_file_cache_valid time default value: open_file_cache_valid 60 field used: HTTP, server, location this command specifies how long to check the effective information of cached items in open_file_cache. Enable GzipGzip on;Gzip_min_length 1 K;Gzip_buffers 4 16 K;Gzip_http_version 1.0;Gzip_comp_level 2;Gzip_types text/plain application/X-JavaScript text/CSS Application/XML;Gzip_vary on; Cache static files: Location ~ * ^. + \. (SwF | GIF | PNG | JPG | JS | CSS) $ {Root/usr/local/ku6/KT
specifies the minimum number of times files are used. If this number is exceeded, the file descriptor is always opened in the cache. For example, if a file is not used once in the inactive time, it will be removed. Kernel Parameter OptimizationCopy codeThe Code is as follows: net. ipv4.tcp _ max_tw_buckets = 6000 The number of timewait instances. The default value is 180000. Copy codeThe Code is as follows: net.
. open_file_cache_min_uses 1; The inactive parameter in the open_file_cache command specifies the minimum number of times files are used. If this number is exceeded, the file descriptor is always opened in the cache. For example, if a file is not used once in the inactive time, it will be removed. Ii. Kernel Parameter Optimization: Net. ipv4.tcp _ max_tw_buckets = 6000 The number of timewait instances. The default value is 180000. Net.
open_file_cache command. if this number is exceeded, the file descriptor is always opened in the cache. for example, if a file is not used once in the inactive time, it will be removed.Kernel parameter optimizationNet. ipv4.tcp _ max_tw_buckets = 6000timewait. the default value is 180000.Net. ipv4.ip _ local_port_range = 1024 65000 port range that allows the system to open.Net.
/wmem_max Maximum TCP data transmission window (in bytes ). 131071 513920 /Proc/sys/NET/CORE/netdev_max_backlog The maximum number of packets that can be sent to the queue when each network interface receives packets faster than the kernel processes these packets. 1000 2000 /Proc/sys/NET/CORE/somaxconn Defines the maximum length of the listening queue for each port in the system. This is a global parameter. 128 2048 /Proc/s
China's access network technology is still developing very rapidly. At the same time, IPv6 networks have already entered the eyes of people. Many people may not understand the problems of IPv4-to-IPv6 transition. It does not matter, after reading this article, you must have gained a lot. I hope this article will teach you more things. During the transition from a mobile network to a mobile IPv6 network, IPv4
Original ConnectionIt was an apple yawn and it was a storm in the iOS industry. Since early May Apple has expressly stated that all developers submitting a new version after June 1 will need to support Ipv6-only's network, and everyone is starting to look at how to support IPV6 and which modules in the application do not currently support IPV6. First, ipv6-only support is what? The first IPV6, is the expansion of the IPV4 address space. At present,
This blog post will give you a detailed description of how NAT64 with DNS64 to complete State address translation, and some of the things you need to be aware of when you use it. In the process of IPV6 evolution, the network side of the IPV6 ready degree is higher, but the business side IPv6 is not optimistic, so the exchange of IPV6 network and IPV4 Network, has become the focus of the current network builders, especially IPV6 user access to
: IPv6 was designed in part to Solve the Problem IPv4 will soon beFacing: the exhaustion of all possible IP addresses. MozillaImplemented IPv6 support in early 2000, but that support did notReceive widespread testing until recently as IPv6-capable OSS andNetwork Software/equipment became more common. One participant bug thatHas appeared exists not in Mozilla, but in IPv6-capable DNS servers:IPv4 address
, the same passwordint s0/0Encapsulation PPPIP Add 1.1.1.1 255.255.255.0PPP Authentication CHAP//Open CHAP authenticationNo shR2Username R1 password Ccxx//local user name password database, the user name must be the other side of the hostname, the same passwordint s0/0Encapsulation PPPIP Add 1.1.1.2 255.255.255.0Clock rate 200000PPP Authentication CHAP//Open CHAP authenticationNo shNAT: ( network address translation )Role:Resolves a private address transition to a public address transmitted over
. 2. The segmentation principle of TCP/IP V4 protocol NetworkThe TCP/IP protocol assigns an IP address to each host in the network, which contains two pieces of information: The network address and the host address. There are two ways to store this information: one is to use two separate domains, so we have to consider the maximum length of two domains, the other is to wrap the network address and host address in 1 domains, sometimes the host address part is very short, sometimes the host addres
Conntrack mechanism can be enabled, note that the maximum number of connections that the gateway host can track is in line with the need; How to build a network firewall environment using Iptables 1, the environment to build and do the corresponding service application testingHost 1, CentOS 7.2 Build model for Gateway InterfaceNIC 01:172.16.5.40/16 External network host address;NIC 02:192.168.22.1/24 intranet host address;~]# Cat/proc/sys/net/
dynamic public network IP; 3. More and more network equipment, real public network IPV4 address resources exhaustion, broadband distribution virtual IP; 4. Offsite Access management systems rely on third-party platforms, Maintenance deployment is more difficult. Analysis of peanut shell domain name Peanut shell domain name analysis software, no need to set up a router, no need for broadband distributio
: BSD socket is an interface that can be used for various network protocols. When it is used for TCP/IP, that is, a socket in the af_inet format is created, additional parameters need to be retained, so there is the struct sock structure.Files mainly include:/NET/IPv4/protocol. C/NET/IPv4/af_inet.c/NET/CORE/sock. c etc . TCP/UDP layer: process the operation on the transport layer. The transport layer is rep
servers, 192.168.81.51 and 192.168.81.234 One VIP 192.168.81.229 Each of the above redis-server instances starts with port 6379. The VIP is on the master, and the round robin is switched to one of the servers. (The data volume of each customer is different, and redis is basically a persistent connection. Unlike Http, it is not completely load balancing) Master slave can be considered in the future. For example, you can run A 17379 instance on the B server to create A 6379 slave on the server. v
(install discuz_x3.0_ SC _utf8.zip) Web1: 172.16.54.200 Web2: 172.16.54.201 Three mysql servers (one master and two slave servers) Master: 172.16.54.203 Slave1: 172.16.54.204 Slave2: 172.16.54.205 Iii. Memory Optimization Edit the sysctl. conf file and add the following content: Shell> vi/etc/sysctl. conf Net. ipv4.tcp _ rmem = 4096 87380 4194304 Net. ipv4.tcp _ wmem = 4096 65536 4194304 Net. core. wmem_de
. Client_header_buffer_size 4 k; the buffer size of the client request header, which can be set according to your system page size. Generally, the size of the header of a request will not exceed 1 k, however, generally, the system page size must be greater than 1 k, so the page size is set here. You can use the getconf PAGESIZE command to obtain the page size. Open_file_cache max = 102400 inactive = 20 s; this will specify the cache for opening the file, which is not enabled by default. max spec
time.Client_header_buffer_size 4 k; the buffer size of the client request header, which can be set according to your system page size. Generally, the size of the header of a request will not exceed 1 k, however, generally, the system page size must be greater than 1 k, so the page size is set here. You can use the getconf PAGESIZE command to obtain the page size.Open_file_cache max = 102400 inactive = 20 s; this will specify the cache for opening the file, which is not enabled by default. max s
to how long it takes to check the cache's valid information. Open_file_cache_min_uses 1; The inactive parameter in the open_file_cache command specifies the minimum number of times files are used. If this number is exceeded, the file descriptor is always opened in the cache. For example, if a file is not used once in the inactive time, it will be removed. Ii. Kernel Parameter Optimization 1. Backup initial Kernel Parameters # Cp/etc/sysctl. conf/etc/sysctl. conf. bak 2. Clear Kernel Paramete
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