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From c513cc3dd10231f267548d644dcb7632516a2348 Mon Sep 17 00:00:00 2001
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From: Thomas Woerner <twoerner@redhat.com>
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Date: Fri, 10 Jun 2016 14:57:58 +0200
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Subject: ip6tables: Warn about use of DROP in nat table
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Clone of 1eada72b with 9bb76094 and e0390bee on top.
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Signed-off-by: Thomas Woerner <twoerner@redhat.com>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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---
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iptables/ip6tables.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/iptables/ip6tables.c b/iptables/ip6tables.c
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index 2731209..c48ddf9 100644
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--- a/iptables/ip6tables.c
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+++ b/iptables/ip6tables.c
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@@ -1720,6 +1720,13 @@ int do_command6(int argc, char *argv[], char **table,
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cs.invert = FALSE;
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}
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+ if (strcmp(*table, "nat") == 0 &&
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+ ((policy != NULL && strcmp(policy, "DROP") == 0) ||
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+ (cs.jumpto != NULL && strcmp(cs.jumpto, "DROP") == 0)))
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+ xtables_error(PARAMETER_PROBLEM,
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+ "\nThe \"nat\" table is not intended for filtering, "
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+ "the use of DROP is therefore inhibited.\n\n");
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+
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for (matchp = cs.matches; matchp; matchp = matchp->next)
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xtables_option_mfcall(matchp->match);
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if (cs.target != NULL)
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--
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cgit v0.12
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