netmask

/***************************************************************************** * Subnet mask, mask length relationship * Statement: * When we operate the Linux system, we often see that we can use the subnet mask, mask length to represent the mask, * for me, has been curious is the subnet mask between 1 can clip a 0, if the clip 0, the mask length * bad calculation. * 2016-5-5 Shenzhen Nanshan Ping Shan village Zengjianfeng ****************************************************** *****************

:###################################################### ############################################################################################################################# ########################################################esx_conf.ps1##ndsiesxi postconfig##csccustomized#loadthevitoolkit# if (-not (get-pssnapin|where-object{$_. name-eq "VMware.VimAutomation.Core"})) {add-pssnapinvmware.vimautomation.core }#variables##sitetrigramtobedeployed/!\need tobeconfigured/! $Site _trigram=

the upper limit will be discarded and not processed) to prevent DoS attacks, that is, flood attacks on a large number of data packets. # Limit SYN flood # Iptables-a input-f-m limit -- limit 100/s -- limit-burst 100-jACCEPT # limit the sending speed of internal packets # Iptables-a forward-f-m limit -- limit 100/s -- limit-burst 100-jACCEPT # restrict the speed of creating online forwarding packets # Allow local Loopback interface, that is, 127.0.0.1 # Allow loopback Iptables-a input-I lo-p all

IP Address Subnet mask calculation, return IP segment start and end range, length, mask and other information. /** * Mask Calculator * @author Weaksun * @param string $ip IP * @param Numeric $bits Mask * @return Array Returns the result set */ function netmask ($ip, $bits = 24) { $result = [ ' Start ' = + 0,//First IP ' End ' = 0,//Last IP ' Length ' = 0,//

Server 2 eth0:10.249.111.10 netmask 255.255.255.0eth2:192.168.111.10 netmask 255.255.255.0Eth2:1: 10.249.111.161 netmask 255.255.255.0 eth0:10.249.111.11 netmask 255.255.255.0eth2:192.168.111.11 netmask 255.255.255.0Eth2:1: 10.249.111.162

. QString localhostname = Qhostinfo::localhostname () qdebug () Output:Localhostname: "WANGL-D-PC"IP Address: (Qhostaddress ("Fe80::396e:183d:aac6:f7f2"), Qhostaddress ("192.168.118.55"))IPv4 Address: "192.168.118.55"Address:qhostaddress ("Fe80::396e:183d:aac6:f7f2")Address:qhostaddress ("192.168.118.55")Address:qhostaddress (":: 1")Address:qhostaddress ("127.0.0.1")Address:qhostaddress ("fe80::5efe:c0a8:7637")Address:qhostaddress ("fe80::e0:0:0:0")3. Get the device name, MAC address, subnet mas

[Email protected] src]# ll/usr/src/Total 16Drwxr-xr-x 2 root root 4096 May11 DebugDrwxr-xr-x 3 root root 4096Aug 5 03:53 kernelslrwxrwxrwx1 root root 5 03:56 Linux->/usr/src/kernels/2.6.18-348.12.1.el5-x86_64[Email protected] src]# CD ipvsadm-1.24[[email protected] ipvsadm-1.24]# Makemake Install [[email protected] ipvsadm-1.24]# lsmod |grepip_vs [Email protected] ipvsadm-1.24]# IpvsadmIP Virtual Server version 1.2.1 (size=4096)Prot Localaddress:portscheduler FlagsRemoteaddress:port Forward Weig

the Ip address based on the company's network proxy. Pay attention to awk here, use = to divide each line, and output the variable = variable before = to the backup file; then replace the original Ip configuration file and restart the NIC. The ip address must be pinged before it can be used. Otherwise, there will be ip conflict. function config_ip(){NETWORK_PATH=/etc/sysconfig/network-scripts/ENFILE=`ls $NETWORK_PATH/ifcfg-en*`IPADDR="10.4.45.211"NETMASK