net ipv4

Original link: http://www.ibm.com/developerworks/cn/linux/l-hisock.htmlUsing the Sockets API, we can develop client and server applications that can communicate on the local network or on a global scale over the Internet. As with other APIs, you can

  It was slow to log on to the company's official website this morning. log on to the server and check the website access information: [Root @ web ~] # Netstat-anp | awk '{print $6}' | sort | uniq-c | sort-rn 172 ESTABLISHED 59 CONNECTED 589

# Make sure NEW tcp connections are SYN packets Iptables-N syn-floodIptables-a input-p tcp -- syn-j syn-floodIptables-A syn-flood-m limit -- limit 1/s -- limit-burst 4-j RETURNIptables-A syn-flood-j DROPIptables-a input-I eth0-p tcp! -- Syn-m state -

1. Establish a listener and Connection Service The code for creating a TCO listener on the server is as follows: Struct sockaddr_in locaddr; struct socket * sock; struct socket * newsock; int RC; int backlog = 0; int shutdown; char * server_ip = "19

Cat /etc/security/limits. conf * Soft nofile 65536 * Hard nofile 65536 * Soft nproc Unlimited * Hard nproc Unlimited EOF Cat /etc/security/limits. d/90-nproc.conf * Soft nproc Unlimited Root soft nproc Unlimited EOF Log on to the

Environment: OS: centos5.532-bit server address: 192.168.1.101 software version: small cdpcre-8.12./c... Environment: Operating system: centos 5.5 32-bit server address: 192.168.1.101 Software version: pcre-8.12.zip nginx-1.0.5.tar.gz

LVS-DR model with placed650) this.width=650; "height=" 231 "src=" http://a3.qpic.cn/psb?/594581eb-e62e-4426-a878-953c87dd5729/ 6sggek03v34b7f8vyowsczwg39ue.2nqhqodflwuh*k!/b/dgybaaaaaaaa&ek=1&kp=1&pt=0&bo=kgloaaaaaaadaou! &su=0265905921&tm=1481868000

Original in: http://rdc.taobao.com/blog/cs? P = 1062 Many TCP adjustment parameters are introduced here, which is very exciting. For a server, we generally consider the QPS that it can support, but for an application, we need to focus on the number

Added the connlimit module when rhel5.1/rhel5 does not compile the kernel. System environment and related software packagesOperating System: Red Hat Enterprise Linux Server Release 5 (2.6.18-53. EL5)Kernel source code path:/usr/src/kernels/2.6.18-53.

Exclusive: this topic describes how the Linux kernel works-general Linux technology-Linux programming and kernel information. For more information, see the following. Source: http://news.csdn.net/n/20090327/124513.html [Csdn March 27 compilation]

1. Keepalived43; lvs43; master-master replication of mysql is a common Mysql high-availability solution. lvs provides read load balancing and Keepalived implements automatic failover through virtual vip drift, although Mysql is configured to

It was slow to log on to the company's official website this morning. log on to the server and check the website access status: [root @ web ~] # Netsta It was slow to log on to the company's official website this morning. log on to the server and

There are many LVS + keepalived configuration memo LVS + keepalived documents for implementing load balancing. Here we will not repeat the description, but only record what is easy to forget during the configuration process. 1. make sure that the IP

Environment: Operating System: centos 5.5 32-bit server address: 192.168.1.101 Software Version: pcre-8.12.zip nginx-1.0.5.tar.gz mysql-5.1.55.tar.gz php-5.3.6.tar.gz 1. Install pcre Unzip pcre-8.12.zip Cd pcre-8.12 ./Configure Make & make

Nginx explanation, configuration and deployment, and high concurrency Optimization I. Common Nginx commands: 1. Start Nginx/usr/local/nginx/sbin/nginxPoechant @ ubuntu: sudo./sbin/nginx2. Stop NginxPoechant @ ubuntu: sudo./sbin/nginx-s stopPoechant @

Linux keepalived + LVS implements mysql slave database load balancing and keepalivedlvsPrerequisites: Reference link: Http://www.osyunwei.com/archives/7464.html Ps: the above are the main references for this operation. I am very grateful for the

: This article mainly introduces the Nginx optimization configuration. if you are interested in the PHP Tutorial, you can refer to it. Cat nginx. conf ## User webroot; Worker_processes 8; Worker_cpu_affinity 00000001 00000010 00000100 00001000 000100

Best security practices for 20 Nginx Web ServersNginx is a lightweight, high-performance Web server/reverse proxy and email proxy (IMAP/POP3) that can run on UNIX, GNU/Linux, BSD variants, mac OS X, on Solaris and Microsoft Windows. According to the

Reprinted: Http://blog.csdn.net/zhangyang0402/archive/2010/06/25/5695050.aspx  I. Network Topology     2. Configure the network   1.Network Configuration of A, gw1, gw2, and B   A: Eth0: Ipaddr: 192.168.1.2 Netmask: 255.255.255.0 Gateway: 192.168.1

Linux Cluster- LVS (DR) + heartbeat LVS + heartbeat   Lvs1AndLvs2The configuration script is the same for the same job. The only difference is thatHeartbeatConfiguration FileHa. cfThe heartbeat address is different.