CIDR SUBNET MASK CHEATSHEET & ICMP TYPE CODES

Netmask Netmask (binary) CIDR Notes _____________________________________________________________________________ 255.255.255.255 11111111.11111111.11111111.11111111 /32 Host (single addr) 255.255.255.254 11111111.11111111.11111111.11111110 /31 Unuseable 255.255.255.252 11111111.11111111.11111111.11111100 /30 2 useable 255.255.255.248 11111111.11111111.11111111.11111000 /29 6 useable 255.255.255.240 11111111.11111111.11111111.11110000 /28 14 useable 255.255.255.224 11111111.11111111.11111111.11100000 /27 30 useable 255.255.255.192 11111111.11111111.11111111.11000000 /26 62…

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dd-wrt administration http disabled

Open the command prompt and run telnet. Connect to <Router_LAN_IP> e.g. 192.168.1.1 so in the command prompt, this would look like: telnet 192.168.1.1 When asked for the username, enter root (even if you changed username in web interface) When asked for…

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