{"id":483,"date":"2018-09-24T12:34:57","date_gmt":"2018-09-24T12:34:57","guid":{"rendered":"https:\/\/www.secureethics.com\/?p=483"},"modified":"2018-10-01T04:50:15","modified_gmt":"2018-10-01T04:50:15","slug":"how-to-configure-cisco-router-wan-and-lan-interface-with-internet-access","status":"publish","type":"post","link":"https:\/\/secureethics.com\/?p=483","title":{"rendered":"How to configure the cisco router WAN and LAN interface with internet access"},"content":{"rendered":"

Network connection diagram of below configuration<\/p>\n

\"\"<\/p>\n

 <\/p>\n

Interface IP Configuration:<\/strong><\/span><\/p>\n

Step: 1<\/strong><\/p>\n

Login into the router with global configuration mode<\/p>\n

Router(config)#<\/pre>\n
Step: 2<\/strong><\/p>\n
Here I’m going to configure WAN interface <\/strong>of the router with ISP public IP address.<\/p>\n
WAN IP\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 :\u00a0 192.168.1.200<\/strong><\/p>\n
WAN Subnet\u00a0 :\u00a0 255.255.255.0<\/strong><\/p>\n
GATEWAY\u00a0\u00a0\u00a0\u00a0\u00a0 :\u00a0 192.168.1.1<\/strong><\/p>\n
WAN Interface Name :\u00a0 FastEthernet0\/0<\/strong><\/p>\n
Router(config)#interface FastEthernet 0\/0\r\n\r\nRouter(config-if)#ip address 192.168.1.200 255.255.255.0\r\n\r\nRouter(config-if)#no shutdown\r\n\r\nRouter(config-if)#exit<\/pre>\n
 <\/p>\n
\"\"<\/p>\n
Step: 3<\/strong><\/p>\n
Now I’m going to configure the LAN interface of the router<\/p>\n
LAN IP\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 :\u00a0 10.10.10 1
\n<\/strong><\/p>\n
WAN Subnet\u00a0 :\u00a0 255.255.255.0<\/strong><\/p>\n
LAN Interface Name :\u00a0 FastEthernet0\/0<\/strong><\/p>\n
Router(config)#interface gigabitEthernet 1\/0\r\n\r\nRouter(config-if)#ip address 10.10.10.1 255.255.255.0\r\n\r\nRouter(config-if)#no shutdown\r\n\r\nRouter(config-if)#exit<\/pre>\n
\"\"<\/h5>\n
<\/h5>\n
NAT Configuration for Internet access from WAN interface to LAN interface:<\/span><\/strong><\/h5>\n
Step 4:<\/strong><\/p>\n
Enable outside NAT into the WAN interface(FastEthernet 0\/0) of the\u00a0 router<\/p>\n
Router(config)#interface fastethernet 0\/0\r\n\r\nRouter(config-if)#ip nat outside\r\n\r\nRouter(config-if)#exit<\/pre>\n
\"\"<\/p>\n
Step 5:<\/strong><\/p>\n
Enable inside NAT into the LAN interface(GigabitEthernet 1\/0) of the router.<\/p>\n
Router(config)#interface Gigabitethernet 1\/0\r\n\r\nRouter(config-if)#ip nat inside<\/pre>\n
\"\"<\/p>\n
Create an access list for allowing LAN interface IP to WAN interface:<\/strong><\/span><\/p>\n
Step 6:<\/strong><\/p>\n
create an access list for LAN IP subnet of the router (10.10.10.0\/24)<\/p>\n
Router(config)#access-list 100 permit ip 10.10.10.0 0.0.0.255 any\r\n\r\nRouter(config)#ip nat inside source list 100 interface fastEthernet 0\/0<\/pre>\n
Note:<\/strong><\/span><\/p>\n
100 is the access list<\/p>\n
\"\"<\/p>\n
Final step creating a default route for the router:<\/strong><\/span><\/p>\n
Step 7:<\/strong><\/p>\n
create a default route for accessing the internet<\/p>\n
Router(config)#ip route 0.0.0.0 0.0.0.0 192.168.1.1<\/pre>\n
\"\"<\/p>\n
Note:<\/strong><\/span><\/p>\n
192.168.1.1 this it is the gateway of ISP<\/p>\n
Step 8 :<\/strong><\/p>\n
Check the internet connectivity in the router<\/p>\n
Router#ping 8.8.8.8<\/pre>\n
\"\"<\/p>\n
the same test you check in the PC( before that configure static IP address into PC Local area connection interface due to DHCP server is not enabled in the router)<\/p>\n
\"\"<\/p>\n
Please let me know if you have any doubts.<\/p>\n","protected":false},"excerpt":{"rendered":"
Network connection diagram of below configuration   Interface IP Configuration: Step: 1 Login into the router with global configuration mode Router(config)# Step: 2 Here I’m going to configure WAN interface of the router with ISP public IP address. WAN IP\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0...<\/p>\n","protected":false},"author":1,"featured_media":472,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-483","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-networking"],"_links":{"self":[{"href":"https:\/\/secureethics.com\/index.php?rest_route=\/wp\/v2\/posts\/483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/secureethics.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/secureethics.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/secureethics.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/secureethics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=483"}],"version-history":[{"count":0,"href":"https:\/\/secureethics.com\/index.php?rest_route=\/wp\/v2\/posts\/483\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/secureethics.com\/index.php?rest_route=\/wp\/v2\/media\/472"}],"wp:attachment":[{"href":"https:\/\/secureethics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/secureethics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/secureethics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}