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firewall: enable incoming ssh and dhcp6

This commit is contained in:
Daniel Barlow 2023-06-28 22:20:45 +01:00
parent 25eecabc6d
commit a9848b9668
1 changed files with 12 additions and 2 deletions
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14
examples/rotuer-firewall.nix
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@ -3,6 +3,7 @@ let
accept = expr : "${expr} accept"; accept = expr : "${expr} accept";
mcast-scope = 8; mcast-scope = 8;
allow-incoming = false; allow-incoming = false;
in {
bogons-ip6 = { bogons-ip6 = {
type = "filter"; type = "filter";
family = "ip6"; family = "ip6";
@ -96,6 +97,15 @@ let
(accept "iifname \"int\" oifname \"ppp0\" ") (accept "iifname \"int\" oifname \"ppp0\" ")
]; ];
}; };
input-lan = {
type = "filter";
family = "ip6";
rules = [
(accept "udp dport 547") # dhcp, could restrict to daddr ff02::1:2
(accept "tcp dport 22")
];
};
input-ip6 = { input-ip6 = {
type = "filter"; type = "filter";
family = "ip6"; family = "ip6";
@ -103,10 +113,12 @@ let
hook = "input"; hook = "input";
rules = [ rules = [
(accept "meta l4proto icmpv6") (accept "meta l4proto icmpv6")
"iifname int jump input-lan"
(if allow-incoming (if allow-incoming
then accept "oifname \"int\" iifname \"ppp0\"" then accept "oifname \"int\" iifname \"ppp0\""
else "oifname \"int\" iifname \"ppp0\" jump incoming-allowed-ip6" else "oifname \"int\" iifname \"ppp0\" jump incoming-allowed-ip6"
) )
# how does this even make sense in an input chain?
(accept "oifname \"int\" iifname \"ppp0\" ct state established,related") (accept "oifname \"int\" iifname \"ppp0\" ct state established,related")
(accept "iifname \"int\" oifname \"ppp0\" ") (accept "iifname \"int\" oifname \"ppp0\" ")
]; ];
@ -120,6 +132,4 @@ let
# "oifname \"int\" ip6 daddr 2001:8b0:de3a:40de::e9d tcp dport 22" # "oifname \"int\" ip6 daddr 2001:8b0:de3a:40de::e9d tcp dport 22"
]; ];
}; };
in {
inherit input-ip6 forward-ip6 bogons-ip6 incoming-allowed-ip6;
} }