diff --git a/release/tools/gce.conf b/release/tools/gce.conf
--- a/release/tools/gce.conf
+++ b/release/tools/gce.conf
@@ -83,8 +83,6 @@
 	cat << EOF >> ${DESTDIR}/etc/sysctl.conf
 net.inet.icmp.drop_redirect=1
 net.inet.ip.redirect=0
-net.inet.tcp.blackhole=2
-net.inet.udp.blackhole=1
 kern.ipc.soacceptqueue=1024
 debug.trace_on_panic=1
 debug.debugger_on_panic=0