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add connection limit allowlist for mail server

This commit is contained in:
Daniel Micay 2024-04-15 23:20:05 -04:00
parent dade50c832
commit 8caa777e11
1 changed files with 16 additions and 4 deletions
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20
nftables/nftables-mail.conf
View File

@ -3,6 +3,18 @@
flush ruleset
table inet filter {
define ip-allowlist-main = {
51.79.66.27, # attestation.app
51.79.52.38, # discuss.grapheneos.org
51.79.51.42, # matrix.grapheneos.org
}
define ip6-allowlist-main = {
2607:5300:205:200::7e9, # attestation.app
2607:5300:205:200::3c4, # discuss.grapheneos.org
2607:5300:205:200::26e1, # matrix.grapheneos.org
}
set ip-connlimit-ssh {
type ipv4_addr
flags dynamic
@ -78,8 +90,8 @@ table inet filter {
ct mark 0x1 accept
tcp dport 22 add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 add @ip6-connlimit-ssh { ip6 saddr and ffff:ffff:ffff:ffff:ffff:: ct count over 1 } counter reject with tcp reset
tcp dport { 25, 80, 443, 465, 993 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 25, 80, 443, 465, 993 } add @ip6-connlimit-main { ip6 saddr and ffff:ffff:ffff:ffff:: ct count over 32 } counter reject with tcp reset
tcp dport { 25, 80, 443, 465, 993 } ip saddr != $ip-allowlist-main add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 25, 80, 443, 465, 993 } ip6 saddr != $ip6-allowlist-main add @ip6-connlimit-main { ip6 saddr and ffff:ffff:ffff:ffff:: ct count over 32 } counter reject with tcp reset
ct mark set 0x1 accept
}
@ -88,8 +100,8 @@ table inet filter {
tcp flags != syn accept
tcp dport 22 add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 add @ip6-connlimit-ssh { ip6 saddr and ffff:ffff:ffff:ffff:ffff:: ct count over 1 } counter reject with tcp reset
tcp dport { 25, 80, 443, 465, 993 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 25, 80, 443, 465, 993 } add @ip6-connlimit-main { ip6 saddr and ffff:ffff:ffff:ffff:: ct count over 32 } counter reject with tcp reset
tcp dport { 25, 80, 443, 465, 993 } ip saddr != $ip-allowlist-main add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 25, 80, 443, 465, 993 } ip6 saddr != $ip6-allowlist-main add @ip6-connlimit-main { ip6 saddr and ffff:ffff:ffff:ffff:: ct count over 32 } counter reject with tcp reset
ct mark set 0x1 accept
}