diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-06-03 01:46:06 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-06-07 21:35:27 +0200 |
| commit | 1c934617f661dc0bc471c0f0b4ace254c55182df (patch) | |
| tree | 9ff04e608ed4565a6514b73c87338a65a4c111c0 /extensions/libxt_tcp.txlate | |
| parent | bb01e33d3828d08cd77cc3c9664b2a995ee150cc (diff) | |
extensions: libxt_tcp: rework translation to use flags match representation
Use the new flags match representation available since nftables 0.9.9
to simplify the translation.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'extensions/libxt_tcp.txlate')
| -rw-r--r-- | extensions/libxt_tcp.txlate | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/extensions/libxt_tcp.txlate b/extensions/libxt_tcp.txlate index bba63324..921d4af0 100644 --- a/extensions/libxt_tcp.txlate +++ b/extensions/libxt_tcp.txlate @@ -11,13 +11,13 @@ iptables-translate -I OUTPUT -p tcp --dport 1020:1023 --sport 53 -j ACCEPT nft insert rule ip filter OUTPUT tcp sport 53 tcp dport 1020-1023 counter accept iptables -A INPUT -p tcp --tcp-flags ACK,FIN FIN -j DROP -nft add rule ip filter INPUT tcp flags & fin|ack == fin counter drop +nft add rule ip filter INPUT tcp flags fin / fin,ack counter drop iptables-translate -A INPUT -p tcp --syn -j ACCEPT -nft add rule ip filter INPUT tcp flags & (fin|syn|rst|ack) == syn counter accept +nft add rule ip filter INPUT tcp flags syn / fin,syn,rst,ack counter accept iptables-translate -A INPUT -p tcp --syn --dport 80 -j ACCEPT -nft add rule ip filter INPUT tcp dport 80 tcp flags & (fin|syn|rst|ack) == syn counter accept +nft add rule ip filter INPUT tcp dport 80 tcp flags syn / fin,syn,rst,ack counter accept iptables-translate -A INPUT -f -p tcp nft add rule ip filter INPUT ip frag-off & 0x1fff != 0 ip protocol tcp counter |