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--- hardware:gatewaynetflow [2019/01/03 18:35] – [IPTABLES Port based NAT] veera
+++ hardware:gatewaynetflow [2019/01/07 11:45] (current) – [How to redirect Netflow to Trisul across network segments using NAT] veera
@@ Line 7: / Line 7: @@
 This HOWTO explains how to use  Linux IPTABLES NAT to solve the issue.
+<note>You may want to setup a GRE Tunnel instead to preserve the router IPs while also using the source IP of the gateway node, read "[[hardware:gretunnel|Setup GRE Tunnel]]"</note>
 ===== IPTABLES Port based NAT =====
@@ Line 23: / Line 24: @@
 # Make sure ip forwarding is enabled in kernel
-echo 1 > /proc/sys/net/ipv4/ip_forwarding
+echo 1 > /proc/sys/net/ipv4/ip_forward
 </code>
@@ Line 32: / Line 33: @@
 <code>
-$ iptables -t nat -A PREROUTING -p udp \
+$ iptables -t nat -A PREROUTING -p udp --dport 2055 -j DNAT --to-destination 10.10.10.17:2055
-    --dport 2055 -j DNAT --to-destination 10.10.10.17:2055
 </code>