*sendbuf++ = ','; }//get the gateway of this interface memset(query_cmd,0,sizeof(query_cmd));sprintf(query_cmd,"route | grep %s | tail -1 | awk {'print $1'} > ./gateway",buf[if_i].ifr_name); system(query_cmd);query_fd = fopen("./gateway", "r+"); ...
前言生产环境中,Public IP 经常比较有限,Linux GateWay可以充分利用有限IP为更多的机器提供网络服务,也可以有意识地将某些服务器隐藏在后面,即可以主动获取网络资源,又避免被动访问,更加安全...---概要---开启内核转发调整内核参数 net.ipv4.ip_forward 开启转发[ro
1、LinuxServer服务器双网卡均是DHCP模式获取的IP地址 ifconfig命令查看可以看到 eth1:192.168.212.128/24 eth0:192.168.31.6/24 ?...2、由上图route -n命令查看路由表可以看到eth1口的gateway网关为192.168.212.2,且为默认网关而网卡配置文件/etc/sysconfig/network-scripts/ifcfg-eth...*里面是看不到网关IP等信...
//获去GateWay QString GetGateWay() { FILE *fp; char buf[512]; char cmd[128]; char gateway[30]; char *tmp; strcpy(cmd, "ip route"); fp = popen(cmd, "r"); if(NULL == fp) { perror("popen error"); return ""; } while(fgets(buf, sizeof(buf), fp) ...
if(rtInfo->gateWay != 0) strcpy(tempBuf, (char *)inet_ntoa(rtInfo->gateWay)); else sprintf(tempBuf,"*.*.*.*\t"); fprintf(stdout,"%s\t", tempBuf);/* Print Interface Name*/ fprintf(stdout,"%s\t", rtInfo->ifName);/
客户端请求DHCP服务器,给我:【IP/netmask】,【gateway】,【连接外网的路由】,使用命令:dhclient -d 客户端想DHCP服务器请求ip地址时,是使用RARP协议的。 RARP协议:我(客户端)有MAC地址,谁(DHCP服务器)能给我一个IP啊。以广播形式发送。 如果网络里有多个DHCP服务器的话,谁给的快,就使用谁给的ip。这个ip是...
1、在/etc/sysconfig/network/if-up.d新建change-nvmeof-vlan-egress.sh,内容如下: #!/bin/sh action=$1 interface=$2 logger "$0: Action: $action, interface: $interface." if [ "x$action" == "xpre-up" ]; then logger "$0: Set $interface EGRESS priority mappings 0:3 1:3 2:3 3:3...
[ 28.629292] cloud-init[837]: ci-info: | Route | Destination | Gateway | Interface | Flags | [ 28.638596] cloud-init[837]: ci-info: +---+---+---+---+---+ [ 28.647791] cloud-init[837]: ci-info: | 1 | fe80::/64 | :: | eth0 | U | [ 28.660622] cloud-init[837]...
[ 28.629292] cloud-init[837]: ci-info: | Route | Destination | Gateway | Interface | Flags | [ 28.638596] cloud-init[837]: ci-info: +---+---+---+---+---+ [ 28.647791] cloud-init[837]: ci-info: | 1 | fe80::/64 | :: | eth0 | U | [ 28.660622] cloud-init[837]: ...
so the kernel has no idea how to get to gateway 192.168.1.254 事实上,发往局域网内的数据包不经过网关 网络抓包 tcpdump[-ccount(抓几个包)][-s snaplen-bytes 每个包抓多长字节的数据-s64每包抓64字节-s0还原到默认][-i network-interface(指定网卡)][-nn Don't convert protocol and port numbers...