Vagrant: shorewall locks me out

During deploy, shorewall starts and deploy cannot even finish because I am locked out.

Getting at the console and turning on logging shows me things like this:

Jan 24 20:12:07 vpn1 kernel: [ 2046.023369] Shorewall:OUTPUT:ACCEPT:IN= OUT=eth1 SRC=10.5.5.45 DST=10.5.5.1 LEN=116 TOS=0x10 PREC=0x00 TTL=64 ID=11603 DF PROTO=TCP SPT=22 DPT=49864 WINDOW=6340 RES=0x00 ACK PSH URGP=0 

(from redmine: created on 2013-01-24, closed on 2013-01-29, relates #861 (closed))