Something changed in the last day, causing both vpnc manual and
NetworkManager-vpnc to fail due to an AVC denial.

type=AVC msg=audit(1192727125.905:29): avc:  denied  { name_bind } for  pid=4069
comm="vpnc" src=4500 scontext=system_u:system_r:vpnc_t:s0
tcontext=system_u:object_r:ipsecnat_port_t:s0 tclass=udp_socket

module vpncawesomeness 1.0;

require {
        type vpnc_t;
        type ipsecnat_port_t;
        class udp_socket name_bind;
}

#============= vpnc_t ==============
allow vpnc_t ipsecnat_port_t:udp_socket name_bind;