diff --git a/shadowsocks-libev/files/ss-rules b/shadowsocks-libev/files/ss-rules
index 5cb75dd57..732d9d620 100755
--- a/shadowsocks-libev/files/ss-rules
+++ b/shadowsocks-libev/files/ss-rules
@@ -229,8 +229,8 @@ ss_rules_iptchains_init_() {
 			fi
 			;;
 		udp)
-			ip rule add fwmark 1 lookup 100
-			ip route add local default dev lo table 100
+			ip rule add fwmark 1 lookup 100 || true
+			ip route add local default dev lo table 100 || true
 			forward_rules="-A ssr_${rule}_forward -p udp -j TPROXY --on-port "$o_redir_udp_port" --tproxy-mark 0x01/0x01"
 			;;
 	esac
diff --git a/shadowsocks-libev/files/ss-rules6 b/shadowsocks-libev/files/ss-rules6
index 729f496c3..1c25b43bf 100755
--- a/shadowsocks-libev/files/ss-rules6
+++ b/shadowsocks-libev/files/ss-rules6
@@ -211,8 +211,8 @@ ss_rules6_iptchains_init_() {
 			fi
 			;;
 		udp)
-			ip -f inet6 rule add fwmark 1 lookup 100
-			ip -f inet6 route add local default dev lo table 100
+			ip -f inet6 rule add fwmark 1 lookup 100 || true
+			ip -f inet6 route add local default dev lo table 100 || true
 			forward_rules="-A ssr6_${rule}_forward -p udp -j TPROXY --on-port "$o_redir_udp_port" --tproxy-mark 0x01/0x01"
 			;;
 	esac