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Re: Default value of net.ipv6.bindv6only should revert to 0

On Sunday 11 April 2010 23:32:01 Marco d'Itri wrote:
> After months, you *still* do not understand the issue...

> If a kernel without IPv6 support is used then e.g. an ACL will contain
> plain IPv4 addresses as expected, but when a kernel with IPv6 support is
> installed in your scenario then that ACL will not work anymore (without
> special code) because now the IPv4 addresses would need to be converted
> to v6-mapped addresses.
1 - In a kernel without IPv6 support, trying to accept IPv6 connections will 
simply fail, so for the server program to work without it, it is safe to 
assume it is using dual stack and setsockopt ipv6only=1 (manually set, of 
So we can also assume it has some code to determine if an address is IPv6 or 

2 - The debian kernel has IPv6 support, so if one is using a custom kernel, is 
safe to assume that he knows what is he doing.

Salvo Tomaselli

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