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RUT240 - UDP port forward between VLANs

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464 views 3 comments
by

Hi everyone, 

I hope this has not been discussed already but I haven't found any answer that helped me. 

I have the following config on my RUT240 and I would like to forward some UDP broadcast packets from one VLAN to the other. I allready tried all trafic rules I can think about but nothing works. I can't manage to get any UDP packet (identified by port) to be forwarded. Can you tell me how to proceed?

Notice that I use wan as lan on the second LAN.

Thanks for your help!




br-lan Link encap:Ethernet HWaddr 00:1E:42:24:4C:10



inet addr:192.168.201.50 Bcast:192.168.201.255 Mask:255.255.255.0



inet6 addr: fe80::21e:42ff:fe24:4c10/64 Scope:Link



UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1



RX packets:256206 errors:0 dropped:0 overruns:0 frame:0



TX packets:51582 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:0



RX bytes:66180798 (63.1 MiB) TX bytes:17226948 (16.4 MiB)



br-lan_pixel Link encap:Ethernet HWaddr 00:1E:42:24:4C:10



inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0



inet6 addr: fe80::21e:42ff:fe24:4c10/64 Scope:Link



UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1



RX packets:2775 errors:0 dropped:0 overruns:0 frame:0



TX packets:450 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:0



RX bytes:659540 (644.0 KiB) TX bytes:64159 (62.6 KiB)



eth0 Link encap:Ethernet HWaddr 00:1E:42:24:4C:10



UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1



RX packets:202070 errors:0 dropped:0 overruns:0 frame:0



TX packets:11191 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:1000



RX bytes:20602515 (19.6 MiB) TX bytes:3443658 (3.2 MiB)



Interrupt:5



eth0.1 Link encap:Ethernet HWaddr 00:1E:42:24:4C:10



UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1



RX packets:0 errors:0 dropped:0 overruns:0 frame:0



TX packets:2647 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:0



RX bytes:0 (0.0 B) TX bytes:642669 (627.6 KiB)



eth1 Link encap:Ethernet HWaddr 00:1E:42:24:4C:11



UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1



RX packets:15722 errors:0 dropped:0 overruns:0 frame:0



TX packets:19983 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:1000



RX bytes:5417057 (5.1 MiB) TX bytes:10734942 (10.2 MiB)



Interrupt:4



lo Link encap:Local Loopback



inet addr:127.0.0.1 Mask:255.0.0.0



inet6 addr: ::1/128 Scope:Host



UP LOOPBACK RUNNING MTU:65536 Metric:1



RX packets:183 errors:0 dropped:0 overruns:0 frame:0



TX packets:183 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:0



RX bytes:19658 (19.1 KiB) TX bytes:19658 (19.1 KiB)



wlan0 Link encap:Ethernet HWaddr 00:1E:42:24:4C:12



inet6 addr: fe80::21e:42ff:fe24:4c12/64 Scope:Link



UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1



RX packets:22112 errors:0 dropped:0 overruns:0 frame:0



TX packets:16339 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:0



RX bytes:17422222 (16.6 MiB) TX bytes:5930365 (5.6 MiB)



wlan0-1 Link encap:Ethernet HWaddr 02:1E:42:24:4C:12



inet6 addr: fe80::1e:42ff:fe24:4c12/64 Scope:Link



UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1



RX packets:14029 errors:0 dropped:0 overruns:0 frame:0



TX packets:12113 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:0



RX bytes:9553529 (9.1 MiB) TX bytes:4456601 (4.2 MiB)



wwan0 Link encap:Ethernet HWaddr 9E:47:18:3E:08:4C



inet addr:10.145.115.86 Bcast:10.145.115.87 Mask:255.255.255.252



inet6 addr: fe80::9c47:18ff:fe3e:84c/64 Scope:Link



UP BROADCAST RUNNING NOARP MULTICAST MTU:1500 Metric:1



RX packets:44378 errors:0 dropped:0 overruns:0 frame:0



TX packets:72876 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:1000



RX bytes:11850668 (11.3 MiB) TX bytes:50683992 (48.3 MiB)




































by 














Please can someone help me with this?



I just want to have 2 separates networks (one using LAN port 1 and wifi and the other on port WAN as LAN of RUT240). And I want to forward UDP packets from one network to the other. It seems like all the rules I try are not working.



Best




















 












by 














Please can anyone help me with this? I really can't make my two networks communicate with each other. Even if I use the same subnet and set all forward rules to accept in the firewall I can't manage to forward any packet.




















 

 
 

 





 






 





1 Answer











 
 





0 votes 


























by 
anonymous









Hello!






Try to create SNAT rules.



You could learn more about them here.






BR



Aliaksandr






























by 














Hi Alex,



Thanks for your help. I tried to create SNAT rules but still don't manage to get it work. To be honest I have the feeling the rules I create are not active. Is there a way to read the generated IPtable and/or follow the rule chain in the RUT240. I already tried to reset the router and start from scratch, but can' see any effect of the forward rules. Plus, I don't really see why it should be a SNAT rule?



Best,