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move IP-based SUPL connection limits to nftables

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This commit is contained in:
Daniel Micay 2024-03-30 20:40:11 -04:00
parent e655732304
commit 457f0bf7e8
1 changed files with 19 additions and 4 deletions
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23
nftables-network.conf
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@ -23,6 +23,16 @@ table inet filter {
flags dynamic
}
set ip-connlimit-supl {
type ipv4_addr
flags dynamic
}
set ip6-connlimit-supl {
type ipv6_addr
flags dynamic
}
chain prerouting-raw {
type filter hook prerouting priority raw
@ -34,8 +44,8 @@ table inet filter {
# drop packets to address not configured on incoming interface (strong host model)
fib daddr . iif type != { local, broadcast, multicast } counter drop
tcp dport { 80, 443, 7275 } notrack accept
tcp dport 22 tcp flags syn notrack accept
tcp dport { 80, 443 } notrack accept
tcp dport { 22, 7275 } tcp flags syn notrack accept
udp dport 123 notrack accept
meta l4proto { icmp, ipv6-icmp } notrack accept
}
@ -44,7 +54,7 @@ table inet filter {
type filter hook output priority raw
oif lo notrack accept
tcp sport { 80, 443, 7275 } notrack accept
tcp sport { 80, 443 } notrack accept
udp sport 123 notrack accept
meta l4proto { icmp, ipv6-icmp } notrack accept
}
@ -54,7 +64,7 @@ table inet filter {
policy drop
iif lo goto input-loopback
tcp dport { 80, 443, 7275 } accept
tcp dport { 80, 443 } accept
udp dport 123 accept
meta l4proto { icmp, ipv6-icmp } accept
ct state vmap { established : accept, related : accept, new : goto graceful-reject }
@ -62,11 +72,16 @@ table inet filter {
tcp dport 22 ip saddr @ip-connlimit-ssh counter reject with tcp reset
tcp dport 22 ip6 saddr and ffff:ffff:ffff:ffff:ffff:: @ip6-connlimit-ssh counter reject with tcp reset
tcp dport 22 synproxy mss 1460 wscale 7 timestamp sack-perm
tcp dport 7275 ip saddr @ip-connlimit-supl counter reject with tcp reset
tcp dport 7275 ip6 saddr @ip6-connlimit-supl counter reject with tcp reset
tcp dport 7275 synproxy mss 1460 wscale 7 timestamp sack-perm
}
chain input-loopback {
tcp dport 22 tcp flags syn ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 tcp flags syn ip6 saddr != $ip6-allowlist-ssh add @ip6-connlimit-ssh { ip6 saddr and ffff:ffff:ffff:ffff:ffff:: ct count over 1 } counter reject with tcp reset
tcp dport 7275 tcp flags syn add @ip-connlimit-supl { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport 7275 tcp flags syn add @ip6-connlimit-supl { ip6 saddr ct count over 32 } counter reject with tcp reset
accept
}