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34 lines
1.2 KiB
Diff
34 lines
1.2 KiB
Diff
From 4a7df7d8c4e40fd2ce0d9f125755249dee17a8bd Mon Sep 17 00:00:00 2001
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From: Yousong Zhou <yszhou4tech@gmail.com>
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Date: Fri, 24 Jul 2020 12:52:59 +0800
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Subject: [PATCH] zones: apply tcp mss clamping also on ingress path
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Fixes FS#3231
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Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
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Acked-by: Jo-Philipp Wich <jo@mein.io>
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(cherry picked from commit e9b90dfac2225927c035f6a76277b850c282dc9a)
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---
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zones.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/zones.c b/zones.c
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index 01fb706..3d54a76 100644
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--- a/zones.c
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+++ b/zones.c
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@@ -552,6 +552,14 @@ print_interface_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
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fw3_ipt_rule_target(r, "TCPMSS");
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fw3_ipt_rule_addarg(r, false, "--clamp-mss-to-pmtu", NULL);
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fw3_ipt_rule_replace(r, "FORWARD");
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+
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+ r = fw3_ipt_rule_create(handle, &tcp, dev, NULL, sub, NULL);
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+ fw3_ipt_rule_addarg(r, false, "--tcp-flags", "SYN,RST");
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+ fw3_ipt_rule_addarg(r, false, "SYN", NULL);
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+ fw3_ipt_rule_comment(r, "Zone %s MTU fixing", zone->name);
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+ fw3_ipt_rule_target(r, "TCPMSS");
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+ fw3_ipt_rule_addarg(r, false, "--clamp-mss-to-pmtu", NULL);
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+ fw3_ipt_rule_replace(r, "FORWARD");
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}
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}
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else if (handle->table == FW3_TABLE_RAW)
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