In server administration, understanding how to manage static routes is a crucial skill.<\/p>\n
This guide will walk you through the process of adding static routes in CentOS 5.6, a popular Linux distribution often used in server environments. This tutorial was carried out on a VPS server<\/a>, so the Network Interface Card (NIC) interface used is ‘venet0’ instead of ‘eth0’. However, the steps remain the same regardless of your environment.<\/p>\n It’s important to note that the configurations discussed here will be erased once the server is rebooted. If you want to permanently apply the routing table, you should use a persistent static route.<\/p>\n Before we begin, let’s take a look at the original routing table. You can view this by using the ‘netstat -rn’ command. The output will look something like this:<\/p>\n The routing table contains information about IP routing and is crucial for the operation of an IP network.<\/p>\n To add a static route for a specific network in Linux, you can use the ‘route add’ command followed by the ‘-net’ option, the network address, and the gateway address. For example:<\/p>\n After running this command, you can check the updated routing table with ‘netstat -rn’. You should see the new static route added to the table.<\/p>\n To delete a static route for a specific network, you can use the ‘route del’ command followed by the ‘-net’ option, the network address, and the gateway address. For example:<\/p>\n After running this command, you can check the updated routing table with ‘netstat -rn’. The static route you added earlier should now be removed from the table.<\/p>\n To add a static route for a specific host in Linux, you can use the ‘route add’ command followed by the ‘-host’ option, the host IP address, and the gateway address. For example:<\/p>\n After running this command, you can check the updated routing table with ‘netstat -rn’. You should see the new static route added to the table.<\/p>\n To delete a static route for a specific host, you can use the ‘route del’ command followed by the ‘-host’ option, the host IP address, and the gateway address. For example:<\/p>\n After running this command, you can check the updated routing table with ‘netstat -rn’. The static route you added earlier should now be removed from the table.<\/p>\n A default gateway is a device that forwards traffic from the local subnet to devices on other subnets. To add a default gateway in Linux, you can use the ‘route add’ command followed by the ‘default’ keyword and the gateway address. For example:<\/p>\n After running this command, you can check the updated routing table with ‘netstat -rn’. You should see the new default gateway added to the table.<\/p>\n To delete a default gateway, you can use the ‘route del’ command followed by the ‘default’ keyword and the gateway address. For example:<\/p>\n After running this command, you can check the updated routing table with ‘netstat -rn’. The default gateway you added earlier should now be removed from the table.<\/p>\n Understanding how to add and delete static routes in CentOS 5.6 is a fundamental skill for any server administrator. This guide has walked you through the process step-by-step, explaining how to add and delete static routes for specific networks and hosts, as well as how to add and delete a default gateway. Remember, these configurations will be erased once the server is rebooted, so if you want to permanently apply the routing table, you should use a persistent static route.<\/p>\n Whether you’re managing a dedicated server<\/a>, a VPS server<\/a>, or a cloud hosting<\/a> environment, these skills will prove invaluable. For more in-depth tutorials and guides, be sure to explore other topics on our best web servers<\/a> page.<\/p>\n What is a static route?<\/p>\n \n A static route is a manually configured network route that is used by the network layer protocols of a host’s operating system to determine where to send packets for a specific network destination.<\/span>\n <\/p>\n<\/li>\n What is a default gateway?<\/p>\n \n A default gateway is a device that forwards traffic from the local subnet to devices on other subnets. It serves as the forwarding host (router) for traffic that is addressed to a different subnet.<\/span>\n <\/p>\n<\/li>\n What is the differencebetween a static route and a default gateway?<\/p>\n \n A static route is a pre-determined path that network information must follow to reach a specific host or network, while a default gateway is a device that serves as an access point to another network.<\/span>\n <\/p>\n<\/li>\n What is the ‘route’ command in Linux?<\/p>\n \n The ‘route’ command in Linux is used to show or modify the IP routing table. It allows you to add, delete, or display routes.<\/span>\n <\/p>\n<\/li>\n What is the ‘netstat -rn’ command in Linux?<\/p>\n \n The ‘netstat -rn’ command in Linux is used to display the kernel routing table in numeric format. It’s a useful command for checking your network configuration and setting up a computer on a network.<\/span>\n <\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":" In server administration, understanding how to manage static routes is a crucial skill. This guide will walk you through the process of adding static routes in CentOS 5.6, a popular…<\/p>\n","protected":false},"author":6,"featured_media":349,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wds_primary_category":0,"footnotes":""},"categories":[1059],"tags":[1247,2089,1536,1802],"class_list":["post-1315","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-static-route","tag-centos-5-6","tag-configuration","tag-linux","tag-static-routes"],"_links":{"self":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/1315","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/comments?post=1315"}],"version-history":[{"count":0,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/1315\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media\/349"}],"wp:attachment":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media?parent=1315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/categories?post=1315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/tags?post=1315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Understanding Your Original Routing Table<\/h2>\n
\r\n[root@server ~]# netstat -rn\r\nKernel IP routing table\r\nDestination Gateway Genmask Flags MSS Window irtt Iface\r\n192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 venet0\r\n169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 venet0\r\n0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 venet0\r\n<\/pre>\n
Adding a Static Route for a Specific Network<\/h2>\n
\r\n[root@server ~]# route add -net 192.168.2.0\/24 gw 192.168.13.1\r\n<\/pre>\n
[root@server ~]# route add -net 192.168.2.0\/24 gw 192.168.13.1\r\n[root@server ~]# netstat -rn\r\nKernel IP routing table\r\nDestination Gateway Genmask Flags MSS Window irtt Iface\r\n192.168.2.0 192.168.13.1 255.255.255.0 UG 0 0 0 venet0\r\n192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 venet0\r\n169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 venet0\r\n0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 venet0<\/pre>\n
\r\n[root@server ~]# route del -net 192.168.2.0\/24 gw 192.168.13.1\r\n<\/pre>\n
[root@server ~]# route del -net 192.168.2.0\/24 gw 192.168.13.1\r\n[root@server ~]# netstat -rn\r\nKernel IP routing table\r\nDestination Gateway Genmask Flags MSS Window irtt Iface\r\n192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 venet0\r\n169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 venet0\r\n0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 venet0<\/pre>\n
Adding a Static Route for a Specific Host<\/h2>\n
\r\n[root@server ~]# route add -host 192.168.2.5 gw 192.168.13.1\r\n<\/pre>\n
[root@server ~]# route add -host 192.168.2.5 gw 192.168.13.1\r\n[root@server ~]# netstat -rn\r\nKernel IP routing table\r\nDestination Gateway Genmask Flags MSS Window irtt Iface\r\n192.168.2.5 192.168.13.1 255.255.255.255 UGH 0 0 0 venet0\r\n192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 venet0\r\n169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 venet0\r\n0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 venet0<\/pre>\n
\r\n[root@server ~]#] route del -host 192.168.2.5 gw 192.168.13.1\r\n<\/pre>\n
[root@server ~]# route del -host 192.168.2.5 gw 192.168.13.1\r\n[root@server ~]# netstat -rn\r\nKernel IP routing table\r\nDestination Gateway Genmask Flags MSS Window irtt Iface\r\n192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 venet0\r\n169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 venet0\r\n0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 venet0<\/pre>\n
Adding a Default Gateway<\/h2>\n
\r\n[root@server ~]# route add default gw 192.168.13.1\r\n<\/pre>\n
\r\n[root@server ~]# route add default gw 192.168.13.1\r\n[root@server ~]# netstat -rn\r\nKernel IP routing table\r\nDestination Gateway Genmask Flags MSS Window irtt Iface\r\n192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 venet0\r\n169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 venet0\r\n0.0.0.0 192.168.13.1 0.0.0.0 UG 0 0 0 venet0\r\n0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 venet0<\/pre>\n
\r\n[root@server ~]# route del default gw 192.168.13.1\r\n<\/pre>\n
\r\n[root@server ~]# route del default gw 192.168.13.1\r\n[root@server ~]# netstat -rn\r\nKernel IP routing table\r\nDestination Gateway Genmask Flags MSS Window irtt Iface\r\n192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 venet0\r\n169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 venet0\r\n0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 venet0<\/pre>\n
Commands Mentioned<\/h2>\n
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Conclusion<\/h2>\n
FAQs<\/h2>\n
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