Hi, Network: LAN 1 Con 1 LAN 2 ========== Router 1 -------------------- Router 2 ========== Computer 3 | | ------------------------------------ Con 2 LAN 1: 192.168.1.0/24 LAN 2: 192.168.2.0/24 CON 1: 192.168.11.0/24 CON 2: 192.168.12.0/24 Router 1 (Lan1): 192.168.1.1 Router 1 (Con1): 192.168.11.1 Router 1 (Con2): 192.168.12.1 Router 2 (Lan2): 192.168.2.1 Router 2 (Con1): 192.168.11.2 Router 2 (Con2): 192.168.12.2 Computer 3: 192.168.2.100 Routes (Router1): 192.168.2.0/24 -> 192.168.12.2 Routes (Router2): 192.168.1.0/24 -> 192.168.12.1 IP Rule (both Router) FW-Mark 1 -> table "con1" Table "con1" (Router1): 192.168.2.0/24 -> 192.168.11.2 Table "con1" (Router2): 192.168.1.0/24 -> 192.168.11.1 iptables -t mangle PREROUTING (both Router) Port 22, 3389 -> mark 1 iptables -t mangle OUTPUT (both Router) all -> mark 1 Explanation: I have 2 routers with 2 connections between them (a fast and a slow line). I want, that all traffic but interactive traffic go over the slow line. Problem If i try to use snmp from Computer 3 to Router 1 (192.168.11.1) the reply packets will have the source adress 192.168.12.1 and the firewall on Router 2 will not accept them. Want do i wrong? Thanks for any help! Mit freundlichen Grüßen P. Schnurbus Pascal Schnurbus IT-Services Phone: +49-231-9792-138 PRO DV Software AG FAX: +49-231-9792-200 Hauert 6 mailto:pascal.schnurbus@prodv.de 44227 Dortmund http://www.prodv.de