Hi Guys,

I am trying to find out if the Kernel does/can put a filter on a NIC?

The thread i am trying to follow, is that i have a small theory that the filter may only allow packets who's Destination MAC match the MAC of the NIC they are trying to cross.

Thanks,

Rich.

Hey Jabirali,

Yes i am aware that the Linux Kernel can filter packets based on MAC. I have seen that ipatbles is capable of doing this via Source MAC.
I have just ventured through many pages ;) (including yours) to get a better understanding of the Proc settings that facilitate switching on/off the 'other' networking settings such as "rp_filter", "log_martians", "accept_source_route", .... and it does not look like i need any of these.

What i am trying to do is quite difficult, and im still learning Linux :), but i was asking a specific question to see if i could understand more about what my NIC would be doing....

Instead of re-writing everything, i will post a link instead ----> http://www.linux.com/community/forums?func=view&catid=28&id=9847

Thanks.

I have gone through all of these settings (in Image) and i think that i have tuned them appropriately (Some are automatically set).

I found that the ones labelled as redirect refer to ICMP (ping) and would not effect my TCP packets, is this correct?
Is it also correct that the ones that would affect routing of my packets are: rp_filter, arp_filter, arp_ignore, proxy_arp, accept_source_route, forwarding?

FYI - I coloured everything Yellow that has a value other than Zero.