[Exherbo-dev] Proper network sandboxing

Bryan Østergaard bryan.ostergaard at gmail.com
Tue Aug 25 23:13:16 BST 2009

On Tue, Aug 25, 2009 at 6:57 PM, Ali Polatel<polatel at gmail.com> wrote:
> In an attempt to implement proper network sandboxing for sydbox, I've
> added sydbox the ability to deny only non-local connections. This is
> very basic right now, we check the sockaddr argument of connect(2) and
> bind(2) calls and use the net_localhost()¹ function to find out if it's
> local. This function needs some work, currently it only allows
> and ::1 through. As always patches are welcome.
> Questions:
> 1. Do we want to check for system calls other than connect(2) and
>   bind(2)?
Don't think so.

> 2. Do we need some kind of network whitelisting? Like whitelisting
>   certain IP addresses. I'm not really sure if this is useful.
Don't think so.

> 3. Currently we only support ipv4 and ipv6 sockets. Do we need support
>   for other types of sockets, if so why?
It might be interesting to block NETLINK sockets as well although I'm
not convinced there's any real value to that.

Bryan Østergaard

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