for the longest time i had been struggling with putty telnet/ssh’ing into my DNS-323. every so often i would drop characters and so typing anything in the shell on the NAS was a monumental waste of time. i have finally figured out why this is happening. it turns out that the reason why i’m having problems is because i have putty set to send a keepalive null packet to the NAS. whenever putty does this, it drops whatever characters i’m typing. talk about weird, huh?