Stuck in FIN_WAIT_2

[grarpamp]

Hi. I've got 900-1000 connections stuck in FIN_WAIT_2.
The processes behind them on both sides have long
since exited. Anything I can do to clear them out
short of reboot? The box is 4.11, so no tcpdrop to try.
I suspect this may be starting to limit mbuf clusters.
Not sure. The box is idle. If in this state the kernel sends
packets, would ipfw reset rule clear it? No big deal.