On 07-09-15 19:50, Pablo Neira Ayuso wrote:
>
> Could you illustrate with examples what you would like to have and the
> limitations you currently hitting?
>
So what I was trying to do is define sets with my local + trusted
networks. So for example:
define local = {
192.168.0.0/24,
2001:888:1001:1::/64,
}
define trusted = {
$local
87.198.233.214,
2001:888:1001::/48,
}
So I'd use these as whitelists, could use $trusted as a wider whitelist
for all my networks and $local as just for completely local traffic.
Containing IPv4 and IPv6 addresses/networks.
Now I'd love to be able to just, for example (and apologies for the
likely wrong syntax, I have not been able to start using nftables in
full, just experimenting):
table inet filter {
chain forward {
type filter hook forward priority 0;
...
# (Mostly) don't filter traffic from my trusted nets
inet saddr $trusted accept;
# Filter the rest more strictly.
...
}
}
This won't work because inet is not an existing match rule. I can have
an "inet" table but it still needs to have ip and ip6 match rules
separately. It is nice that many other rules just work like for example
tcp/udp and ct.
Now if I could just do:
# (Mostly) don't filter traffic from my trusted nets
ip saddr $trusted accept;
ip6 saddr $trusted accept;
somehow and have nft take just the v4 and just the v6 addresses for each
line, that would also be workable. Or what I tried doing (but then I ran
into the crash bug I've just reported), is separate the two whitelists
completely and do:
# (Mostly) don't filter traffic from my trusted nets
ip saddr $trusted4 accept;
ip6 saddr $trusted6 accept;
The latter would work and is not bad, just kludgy. Being able to just
refer to a single mixed set of addresses from a single rule would
certainly be the most convenient, as one more step towards fully
unifying IPv4 + IPv6 filtering.
Kind regards,
Wilmer van der Gaast.
--
+-------- .''`. - -- ---+ + - -- --- ---- ----- ------+
| wilmer : :' : gaast.net | | OSS Programmer www.bitlbee.org |
| lintux `. `~' debian.org | | Full-time geek wilmer.gaast.net |
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