* [nftables PATCH] doc: fix tcpdump example
@ 2025-10-13 17:17 georg
2025-10-13 19:19 ` Fernando Fernandez Mancera
0 siblings, 1 reply; 3+ messages in thread
From: georg @ 2025-10-13 17:17 UTC (permalink / raw)
To: netfilter-devel; +Cc: Georg Pfuetzenreuter
From: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>
The expression needs to be enclosed in a single string and combined with
a logical AND to have the desired effect.
Fixes: 1188a69604c3 ("src: introduce SYNPROXY matching")
Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>
---
doc/statements.txt | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/doc/statements.txt b/doc/statements.txt
index 6226713ba389..834f95fbb2a8 100644
--- a/doc/statements.txt
+++ b/doc/statements.txt
@@ -691,8 +691,7 @@ needed for selective acknowledgement and window scaling).
---------------------------------------
Determine tcp options used by backend, from an external system
- tcpdump -pni eth0 -c 1 'tcp[tcpflags] == (tcp-syn|tcp-ack)'
- port 80 &
+ tcpdump -pni eth0 -c 1 'tcp[tcpflags] == (tcp-syn|tcp-ack) && port 80' &
telnet 192.0.2.42 80
18:57:24.693307 IP 192.0.2.42.80 > 192.0.2.43.48757:
Flags [S.], seq 360414582, ack 788841994, win 14480,
--
2.50.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [nftables PATCH] doc: fix tcpdump example
2025-10-13 17:17 [nftables PATCH] doc: fix tcpdump example georg
@ 2025-10-13 19:19 ` Fernando Fernandez Mancera
2025-10-13 19:43 ` Florian Westphal
0 siblings, 1 reply; 3+ messages in thread
From: Fernando Fernandez Mancera @ 2025-10-13 19:19 UTC (permalink / raw)
To: georg, netfilter-devel; +Cc: Georg Pfuetzenreuter
On 10/13/25 7:17 PM, georg@syscid.com wrote:
> From: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>
>
> The expression needs to be enclosed in a single string and combined with
> a logical AND to have the desired effect.
>
> Fixes: 1188a69604c3 ("src: introduce SYNPROXY matching")
> Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>
> ---
> doc/statements.txt | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
Thank you Georg!
Reviewed-by: Fernando Fernandez Mancera <fmancera@suse.de>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [nftables PATCH] doc: fix tcpdump example
2025-10-13 19:19 ` Fernando Fernandez Mancera
@ 2025-10-13 19:43 ` Florian Westphal
0 siblings, 0 replies; 3+ messages in thread
From: Florian Westphal @ 2025-10-13 19:43 UTC (permalink / raw)
To: Fernando Fernandez Mancera; +Cc: georg, netfilter-devel, Georg Pfuetzenreuter
Fernando Fernandez Mancera <fmancera@suse.de> wrote:
> > The expression needs to be enclosed in a single string and combined with
> > a logical AND to have the desired effect.
> Reviewed-by: Fernando Fernandez Mancera <fmancera@suse.de>
Applied, thanks everyone.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2025-10-13 17:17 [nftables PATCH] doc: fix tcpdump example georg
2025-10-13 19:19 ` Fernando Fernandez Mancera
2025-10-13 19:43 ` Florian Westphal
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