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