netdev - Re: What is the correct behavior ipv4/ipv6

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <1500354494.5566.36.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Mon, 17 Jul 2017 22:08:14 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Rao Shoaib <rao.shoaib@...cle.com>
Cc:     netdev@...r.kernel.org
Subject: Re: What is the correct behavior ipv4/ipv6

On Mon, 2017-07-17 at 11:28 -0700, Rao Shoaib wrote:
> I am looking at a system which is configured for IPv6 only but sits in a 
> network that serves both IPv4 and IPv6. When an IPv4 packet with a 
> destination  broadcast address is sent out (in this case DHCP) the 
> system accepts it and since it does not have any route to the sender it 
> prints the Martian message.

Which message exactly is printed ?

> 
> Sure, we can turn off the Martian message and maybe the system should be 
> in an IPv6 only network.
> 
> The question that is being asked is that why is the system accepting an 
> IPv4 broadcast packet in the first place ?  Is this behavior incorrect 
> and should I submit a patch ?
> 
> Thanks,
> 
> Shoaib
>