diff --git a/setup-usl-mm b/setup-usl-mm
index 374ac6b..e5433ca 100755
--- a/setup-usl-mm
+++ b/setup-usl-mm
@@ -65,6 +65,7 @@ echo "fs.inotify.max_queued_events = 1048576" >> /etc/sysctl.d/50-usl-mm.conf
 echo "fs.inotify.max_user_instances = 1048576" >> /etc/sysctl.d/50-usl-mm.conf
 echo "fs.inotify.max_user_watches = 1048576" >> /etc/sysctl.d/50-usl-mm.conf
 echo "kernel.dmesg_restrict = 1" >> /etc/sysctl.d/50-usl-mm.conf
+echo "net.netfilter.nf_conntrack_max = 4194304" >> /etc/sysctl.d/50-usl-mm.conf
 
 echo "Configuring arc cache for zfs to min 256MB and max 1536MB + txg_timeout to 3"
 echo "options zfs zfs_arc_min=268435456" > /etc/modprobe.d/zfs.conf