靜態路由
是一種路由方式,由網路管理員手動操作路由表,將路由項 routing entry 輸入至路由表中。
IP 的位址與子遮罩都攸關流量控制(分流)。
Internet (WAN)
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(LAN)
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Router 1 ----------- SW ---------- workstations
192.168.1.254 (private ip)
NAT (public ip)
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(Protected LAN)
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Router 2
192.168.1.100 (public ip)
192.168.1.254 (default gW)
192.168.100.1 (private ip)
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SW
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Group of Workstations
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My PC(admin) Mail Server Web Server
192.168.100.24 192.168.100.3 192.168.100.4
192.168.100.1 (default GW)
receive request
Web Server <----------- Router 2 <----------- Router 1 <----------- Internet
192.168.100.4 192.168.100.1 192.168.1.254
192.168.100.1 192.168.1.254 NAT
send response
Web Server -----------> Router 2 -----------> Router 1 -----------> Internet
192.168.100.4 192.168.100.1 192.168.1.254
192.168.100.1 192.168.1.254 NAT
My PC (admin)
IP: 192.168.100.24
netmask: 255.255.255.0
gateway: 192.168.100.1
hostname: clientlinux.centos.PkateQ
DNS: 168.95.1.1 (等待確認)
Router 2 (受保護內網的路由器)
兩張 NIC
eth0: 192.168.1.100/24 (public ip)
eth1: 192.168.100.1/24 (private ip)
Router 1 (連接外網與內網的路由器)
兩張 NIC
對外的網卡 > 設定在 eth1 介面
而對內部的 > 設定在 eth0 介面 > 192.168.1.254
http://linux.vbird.org/linux_server/0230router.php#route_static