Zack Tech Blog

Introduction Network Address Translation (NAT) is a fundamental technique used in networking to translate private IP addresses to public IP addresses and vice versa. Static NAT is a method where a specific private IP address is mapped to a specific public IP address.  Configuration Steps Router Configuration Enable NAT Service Router(config)# ip nat inside source static [inside-local] [inside-global] Replace [inside-local] with the private IP address to be translated. Replace [inside-global] with the public IP address to translate to. Configure Interfaces Router(config)# interface [inside-interface] Router(config-if)# ip address [inside-ip-address] [subnet-mask] Router(config-if)# ip nat inside Router(config-if)# no shutdown Router(config-if)# exit Router(config)# interface [outside-interface] Router(config-if)# ip address [outside-ip-address] [subnet-mask] Router(config-if)# ip nat outside Router(config-if)# no shutdown Router(config-if)# exit Replace [inside-interf...

DHCP Go to the router cli enable it configure terminal it ip dhcp pool anyname          //this is to create dhcp pool name can be any network start_ip_address subnet_mask     // from what ip address you want to configure default-router gateway_ip_address     // this is to provide default gateway To exclude the ip address to assign use: ip dhcp excluded-address ip_address

Configuring OSPF  Step 1: Enter Configuration Mode Router>   enable Router#  configure terminal Step 2: Enable OSPF Enable OSPF with a process ID. The process ID is locally significant and can be any number. Router(config)# router ospf <process-Id> Step 3: Set the OSPF Router ID Setting a unique OSPF Router ID is optional but recommended for stability and troubleshooting. The Router ID should be a unique IPv4 address within the OSPF domain. Router(config-router)# router-id <router-id> Step 4: Define Networks to Include in OSPF Specify which networks will participate in OSPF and their corresponding areas. Ensure the areas match across all routers in the OSPF domain. Router(config-router)# network <network-address> <wildcard-mask> area <area-id> Step 5: Save the configuration Router(config-router)# exit Router(config)# do write / do wr Verification Commands View OSPF Neighbors show ospf neighbor View the OSPF Routing Table show ip route ospf...