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3 Commits
9f84c50869 ... 7782c861cb

Author SHA1 Message Date
Daniel Micay 7782c861cb nftables: reorder rule for rejecting SSH via anycast 2024-04-15 23:54:17 -04:00
Daniel Micay 8caa777e11 add connection limit allowlist for mail server 2024-04-15 23:21:26 -04:00
Daniel Micay dade50c832 nftables: drop unnecessary ssh localhost allowlist 2024-04-15 22:38:36 -04:00
9 changed files with 38 additions and 80 deletions
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16
nftables/nftables-attestation.conf
View File

@ -3,14 +3,6 @@
flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
}
define ip6-allowlist-ssh = {
::1,
}
set ip-connlimit-ssh {
type ipv4_addr
flags dynamic
@ -84,8 +76,8 @@ table inet filter {
# add connections established without synproxy to connection limit sets with limits enforced
chain input-tcp-service-established {
ct mark 0x1 accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 80, 443 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 80, 443 } 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
@ -94,8 +86,8 @@ table inet filter {
# add connections established with synproxy to connection limit sets with limits enforced
chain input-tcp-service-loopback {
tcp flags != syn accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 80, 443 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 80, 443 } 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

16
nftables/nftables-discuss.conf
View File

@ -3,14 +3,6 @@
flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
}
define ip6-allowlist-ssh = {
::1,
}
set ip-connlimit-ssh {
type ipv4_addr
flags dynamic
@ -84,8 +76,8 @@ table inet filter {
# add connections established without synproxy to connection limit sets with limits enforced
chain input-tcp-service-established {
ct mark 0x1 accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 80, 443 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 80, 443 } 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
@ -94,8 +86,8 @@ table inet filter {
# add connections established with synproxy to connection limit sets with limits enforced
chain input-tcp-service-loopback {
tcp flags != syn accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 80, 443 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 80, 443 } 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

28
nftables/nftables-mail.conf
View File

@ -3,12 +3,16 @@
flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
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-ssh = {
::1,
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 {
@ -84,20 +88,20 @@ table inet filter {
# add connections established without synproxy to connection limit sets with limits enforced
chain input-tcp-service-established {
ct mark 0x1 accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 { 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 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 } 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
}
# add connections established with synproxy to connection limit sets with limits enforced
chain input-tcp-service-loopback {
tcp flags != syn accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 { 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 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 } 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
}

16
nftables/nftables-matrix.conf
View File

@ -3,14 +3,6 @@
flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
}
define ip6-allowlist-ssh = {
::1,
}
set ip-connlimit-ssh {
type ipv4_addr
flags dynamic
@ -84,8 +76,8 @@ table inet filter {
# add connections established without synproxy to connection limit sets with limits enforced
chain input-tcp-service-established {
ct mark 0x1 accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 80, 443 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 80, 443 } 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
@ -94,8 +86,8 @@ table inet filter {
# add connections established with synproxy to connection limit sets with limits enforced
chain input-tcp-service-loopback {
tcp flags != syn accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 80, 443 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 80, 443 } 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

2
nftables/nftables-network.conf
View File

@ -4,12 +4,10 @@ flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
51.222.159.116, # 0.grapheneos.network
}
define ip6-allowlist-ssh = {
::1,
2607:5300:205:200::2584, # 0.grapheneos.network
}

16
nftables/nftables-ns1.conf
View File

@ -3,14 +3,6 @@
flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
}
define ip6-allowlist-ssh = {
::1,
}
set ip-connlimit-ssh {
type ipv4_addr
flags dynamic
@ -87,8 +79,8 @@ table inet filter {
# add connections established without synproxy to connection limit sets with limits enforced
chain input-tcp-service-established {
ct mark 0x1 accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 53, 80, 443, 853 } add @ip-connlimit-main { ip saddr ct count over 16 } counter reject with tcp reset
tcp dport { 53, 80, 443, 853 } add @ip6-connlimit-main { ip6 saddr and ffff:ffff:ffff:ffff:: ct count over 16 } counter reject with tcp reset
ct mark set 0x1 accept
@ -97,8 +89,8 @@ table inet filter {
# add connections established with synproxy to connection limit sets with limits enforced
chain input-tcp-service-loopback {
tcp flags != syn accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 53, 80, 443, 853 } add @ip-connlimit-main { ip saddr ct count over 16 } counter reject with tcp reset
tcp dport { 53, 80, 443, 853 } add @ip6-connlimit-main { ip6 saddr and ffff:ffff:ffff:ffff:: ct count over 16 } counter reject with tcp reset
ct mark set 0x1 accept

6
nftables/nftables-ns2.conf
View File

@ -4,12 +4,10 @@ flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
198.98.53.141, # 0.ns2.grapheneos.org
}
define ip6-allowlist-ssh = {
::1,
2605:6400:10:102e:95bc:89ef:2e7f:49bb, # 0.ns2.grapheneos.org
}
@ -46,11 +44,11 @@ table inet filter {
# ordered after accepting loopback to permit using external IPs via loopback
fib daddr . iif type != { local, broadcast, multicast } counter drop
udp dport 53 notrack accept
# reject SSH packets via anycast IP
tcp dport 22 ip daddr 198.251.90.93 reject with tcp reset
udp dport 53 notrack accept
# handle new TCP connections beyond rate limit via synproxy to avoid conntrack table exhaustion
tcp dport { 22, 53, 80, 443, 853 } tcp flags syn limit rate over 1024/second burst 128 packets counter notrack accept

16
nftables/nftables-social.conf
View File

@ -3,14 +3,6 @@
flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
}
define ip6-allowlist-ssh = {
::1,
}
set ip-connlimit-ssh {
type ipv4_addr
flags dynamic
@ -84,8 +76,8 @@ table inet filter {
# add connections established without synproxy to connection limit sets with limits enforced
chain input-tcp-service-established {
ct mark 0x1 accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 80, 443 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 80, 443 } 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
@ -94,8 +86,8 @@ table inet filter {
# add connections established with synproxy to connection limit sets with limits enforced
chain input-tcp-service-loopback {
tcp flags != syn accept
tcp dport 22 ip saddr != $ip-allowlist-ssh add @ip-connlimit-ssh { ip saddr ct count over 1 } counter reject with tcp reset
tcp dport 22 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 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 { 80, 443 } add @ip-connlimit-main { ip saddr ct count over 32 } counter reject with tcp reset
tcp dport { 80, 443 } 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

2
nftables/nftables-web.conf
View File

@ -4,13 +4,11 @@ flush ruleset
table inet filter {
define ip-allowlist-ssh = {
127.0.0.1,
51.222.156.101, # 0.grapheneos.org
167.114.114.114, # 0.releases.grapheneos.org
}
define ip6-allowlist-ssh = {
::1,
2607:5300:205:200::29c6, # 0.grapheneos.org
2607:5300:201:3100::6210, # 0.releases.grapheneos.org
}