What would happen if I had a small botnet and DDOS'd spam traffic on the ports Bitcoin uses, does it (bitcoin-qt) have filtering mechanisms or could it cause this kinda slow network propagation?
DDoS is an arm wrestling. The one with more bandwidth wins. If the botnet operator is aiming at a single bitcoiner, then this bitcoiner is likely in trouble. But the entire network? His botnet would need more bandwidth than the bandwidth of the entire network combined. Quite unlikely.
Or do you mean DoS through the Bitcoin protocol itself, like trying to flood fake transactions and such? Bitcoin peers have a series of protections against that. The attacker would have to spend a fortune in transaction fees.
I mean like when you send an IP (might be TCP) packet that has the wrong length or is malformed in someway, some machines not running IPtables will freak out, what if you flood Bitcoin clients with packets full of random junk but legitimate headers, what will happen?
now my client says 12 confims, Blockchain says 9 and mt gox still hasnt credited my btc so who knows. I sent 1.98Btc with a 0.01 fee.
this blockchain limit needs sorting like within weeks not months, it takes the piss how slow transactions are, if this issue cannot be resolved there is no hope for bitcoin to be able to be a real world payment system for reasonable amounts.
