diff --git a/config/etc/sysctl.conf b/config/etc/sysctl.conf
index 31a220e38..e35ee0dc4 100644
--- a/config/etc/sysctl.conf
+++ b/config/etc/sysctl.conf
@@ -35,6 +35,9 @@ net.ipv6.conf.default.disable_ipv6 = 1
 net.ipv6.conf.all.accept_redirects = 0
 net.ipv6.conf.default.accept_redirects = 0
 
+# Do not try to pick up existing TCP connections in conntrack
+net.netfilter.nf_conntrack_tcp_loose = 0
+
 # Enable netfilter accounting
 net.netfilter.nf_conntrack_acct = 1