hardware:gatewaynetflow
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hardware:gatewaynetflow [2019/01/03 17:38] – [Reference] veera | hardware:gatewaynetflow [2019/01/04 17:54] – [Then setup the Port NAT] dhinesh | ||
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====== How to redirect Netflow to Trisul across network segments using NAT ====== | ====== How to redirect Netflow to Trisul across network segments using NAT ====== | ||
- | In some customers, Trisul is on a separate segment from the production routers. These sites often have a gateway device that be be used to access. | + | In some customers, Trisul is often deployed |
{{: | {{: | ||
- | This HOWTO explains how to use Linux IPTABLES NAT to move between | + | This HOWTO explains how to use Linux IPTABLES NAT to solve the issue. |
===== IPTABLES Port based NAT ===== | ===== IPTABLES Port based NAT ===== | ||
- | On the gateway device you just need to run the following commands, say you want to move port 2055 to a particular IP. | + | **On the gateway device** you just need to run the following commands, say you want to move port 2055 to a particular IP. |
==== Shutdown ufw or disable firewalld ==== | ==== Shutdown ufw or disable firewalld ==== | ||
+ | since we are working directly with iptables. | ||
< | < | ||
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# Make sure ip forwarding is enabled in kernel | # Make sure ip forwarding is enabled in kernel | ||
- | echo 1 > / | + | echo 1 > / |
</ | </ | ||
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< | < | ||
$ iptables -t nat -A PREROUTING -p udp --dport 2055 -j DNAT --to-destination 10.10.10.17: | $ iptables -t nat -A PREROUTING -p udp --dport 2055 -j DNAT --to-destination 10.10.10.17: | ||
- | $ iptables -t nat -A POSTROUTING -j MASQUERADE | ||
</ | </ | ||
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- | ==== Reference | + | <note important> |
+ | </ | ||
+ | ==== Useful commands | ||
- | How to redirect incoming traffic on a port to another IP [[[https:// | + | To view NAT rules with counters |
+ | '' | ||
+ | iptables | ||
+ | '' | ||
+ | ==== Reference ==== | ||
+ | Forwarding and NAT with IPTABLES : Redhat https:// |
hardware/gatewaynetflow.txt · Last modified: 2019/01/07 11:45 by veera