tcp hostcache and ip fastforward for review

Jonathan Mini mini at
Sun Nov 9 12:59:57 PST 2003

On Nov 9, 2003, at 8:19 AM, Andre Oppermann wrote:

>   - DoS attack 2: make MSS very low on local side of connection
>     and send maaaany small packet to remote host. For every packet
>     (eg. 2 bytes payload) a sowakeup is done to the listening
>     process. Consumes a lot of CPU there.

This sounds as if it might be worthwhile to add a delay to
the TF_NODELAY case for receive processing as well.

Jonathan Mini
mini at

More information about the freebsd-current mailing list