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mutluit
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Any routable protocols below the IP level?

Sun Apr 26, 2020 2:25 am

I want to reduce/limit/block the use of the many protocols in Ethernet which I don't need at the moment.
In Ethernet, are there any protocols below the IP level that are still routable to outside the LAN? Ie. can an Ethernet frame w/o IP/UDP/TCP on top be sent to beyond the LAN?
What about raw Ethernet packets: can these be sent also beyond the LAN?
 
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mutluit
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Re: Any routable protocols below the IP level?

Sun Apr 26, 2020 3:02 am

To answer my own question after some research on the web: no, Ethernet frames have only MAC addresses; ie. only packets with an IP header on top of the Ethernet frame are routable. So, raw Ethernet packets are not routable.
Raw sockets are a different thing: they are routable, cf. http://man7.org/linux/man-pages/man7/raw.7.html
S.a. https://networkengineering.stackexchang ... -to-raw-ip
 
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anav
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Re: Any routable protocols below the IP level?

Fri May 08, 2020 4:35 am

Can you keep your spam to a minimum please.
You already have this thread going here.....

viewtopic.php?f=13&t=160812

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