diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-07-22 13:04:34 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-07-24 13:21:41 +0200 |
| commit | 26ec09bf6b9b674a7e3a65fc9c12599bd81dfe0f (patch) | |
| tree | e5cc9b98e88c73c860af7fca4122561e479623c8 /extensions | |
| parent | 5105e844c2ff6a3e320bf8cdadc5094d4eaef2b7 (diff) | |
extensions: libxt_conntrack: provide translation for DNAT and SNAT --ctstate
iptables-translate -t filter -A INPUT -m conntrack --ctstate DNAT -j ACCEPT
nft add rule ip filter INPUT ct status dnat counter accept
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'extensions')
| -rw-r--r-- | extensions/libxt_conntrack.c | 18 | ||||
| -rw-r--r-- | extensions/libxt_conntrack.txlate | 7 |
2 files changed, 20 insertions, 5 deletions
diff --git a/extensions/libxt_conntrack.c b/extensions/libxt_conntrack.c index 6f350393..7734509c 100644 --- a/extensions/libxt_conntrack.c +++ b/extensions/libxt_conntrack.c @@ -1249,11 +1249,19 @@ static int _conntrack3_mt_xlate(struct xt_xlate *xl, } if (sinfo->match_flags & XT_CONNTRACK_STATE) { - xt_xlate_add(xl, "%sct state %s", space, - sinfo->invert_flags & XT_CONNTRACK_STATE ? - "!= " : ""); - state_xlate_print(xl, sinfo->state_mask); - space = " "; + if ((sinfo->state_mask & XT_CONNTRACK_STATE_SNAT) || + (sinfo->state_mask & XT_CONNTRACK_STATE_DNAT)) { + xt_xlate_add(xl, "%sct status %s%s", space, + sinfo->invert_flags & XT_CONNTRACK_STATUS ? "!=" : "", + sinfo->state_mask & XT_CONNTRACK_STATE_SNAT ? "snat" : "dnat"); + space = " "; + } else { + xt_xlate_add(xl, "%sct state %s", space, + sinfo->invert_flags & XT_CONNTRACK_STATE ? + "!= " : ""); + state_xlate_print(xl, sinfo->state_mask); + space = " "; + } } if (sinfo->match_flags & XT_CONNTRACK_STATUS) { diff --git a/extensions/libxt_conntrack.txlate b/extensions/libxt_conntrack.txlate index 8a3d0181..d374f8a0 100644 --- a/extensions/libxt_conntrack.txlate +++ b/extensions/libxt_conntrack.txlate @@ -42,3 +42,10 @@ nft add rule ip filter INPUT ct direction original counter accept iptables-translate -t filter -A INPUT -m conntrack --ctstate NEW --ctproto tcp --ctorigsrc 192.168.0.1 --ctorigdst 192.168.0.1 --ctreplsrc 192.168.0.1 --ctrepldst 192.168.0.1 --ctorigsrcport 12 --ctorigdstport 14 --ctreplsrcport 16 --ctrepldstport 18 --ctexpire 10 --ctstatus SEEN_REPLY --ctdir ORIGINAL -j ACCEPT nft add rule ip filter INPUT ct direction original ct original protocol 6 ct state new ct status seen-reply ct expiration 10 ct original saddr 192.168.0.1 ct original daddr 192.168.0.1 ct reply saddr 192.168.0.1 ct reply daddr 192.168.0.1 ct original proto-src 12 ct original proto-dst 14 ct reply proto-src 16 ct reply proto-dst 18 counter accept + +iptables-translate -t filter -A INPUT -m conntrack --ctstate SNAT -j ACCEPT +nft add rule ip filter INPUT ct status snat counter accept + +iptables-translate -t filter -A INPUT -m conntrack --ctstate DNAT -j ACCEPT +nft add rule ip filter INPUT ct status dnat counter accept + |