• if you changed your admin username you still have to use “root” when logging through telnet
• drop to your command line and use command “telnet” or use PuTTY if you want to look cool in front of your girl/friend/mom
• don’t bother typing, just copy & paste this:

nvram set rc_startup="
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
echo '600 1800 120 60 120 120 10 60 30 120' > /proc/sys/net/ipv4/ip_conntrack_tcp_timeouts
"
nvram commit
reboot

• check after reboot with: (It should return “1”)

more /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses