* nflog_bind_group() question
@ 2009-12-01 10:44 Fred Leeflang
2009-12-01 10:49 ` Patrick McHardy
0 siblings, 1 reply; 2+ messages in thread
From: Fred Leeflang @ 2009-12-01 10:44 UTC (permalink / raw)
To: netfilter-devel; +Cc: vuurmuur-devel
Hi devs,
We've recently implemented NFLOG support in vuurmuur, I've written an
article on the effort here
http://wordpress.3dn.nl/2009/11/25/iptabes-nflog-support-in-vuurmuur/
I'm curious about something I found out in the process. I've had
ulogd2 running alongside vuurmuur for a while and configured it to
listen to a specific nflog-group. When I had ulogd2 running I would
not be able to run vuurmuur_log which also listens to an nflog-group.
It took me a while to realize that it would not work because of having
ulogd2 running and both trying to listen to the SAME nflog-group.
Does this mean that it's not possible for two applications at the same
time to get netfilter_log messages from the same nflog-group?
-Fred
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: nflog_bind_group() question
2009-12-01 10:44 nflog_bind_group() question Fred Leeflang
@ 2009-12-01 10:49 ` Patrick McHardy
0 siblings, 0 replies; 2+ messages in thread
From: Patrick McHardy @ 2009-12-01 10:49 UTC (permalink / raw)
To: Fred Leeflang; +Cc: netfilter-devel, vuurmuur-devel
Fred Leeflang wrote:
> Hi devs,
>
> We've recently implemented NFLOG support in vuurmuur, I've written an
> article on the effort here
> http://wordpress.3dn.nl/2009/11/25/iptabes-nflog-support-in-vuurmuur/
>
> I'm curious about something I found out in the process. I've had
> ulogd2 running alongside vuurmuur for a while and configured it to
> listen to a specific nflog-group. When I had ulogd2 running I would
> not be able to run vuurmuur_log which also listens to an nflog-group.
> It took me a while to realize that it would not work because of having
> ulogd2 running and both trying to listen to the SAME nflog-group.
>
> Does this mean that it's not possible for two applications at the same
> time to get netfilter_log messages from the same nflog-group?
That is correct, nfnetlink_log uses unicast messages to the process
bound to the group. I'd also prefer if we had used multicast messaging,
but that can't be easily changed now.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2009-12-01 10:44 nflog_bind_group() question Fred Leeflang
2009-12-01 10:49 ` Patrick McHardy
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