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%pI4 also exists in the Linux kernel.
It would be good to have some generic functions to convert binary data
to address string. Later.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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How to use this helper in a few steps:
1) You can enable this helper via:
nfct helper add rpc inet tcp
nfct helper add rpc inet udp
2) Configure /etc/conntrackd/conntrackd.conf and launch it.
3) You can test this helper locally with the following rule-set:
iptables -A OUTPUT -t raw -p udp -m udp --dport 111 -j CT --helper rpc
iptables -A OUTPUT -t raw -p tcp -m tcp --dport 111 -j CT --helper rpc
iptables -A OUTPUT -p tcp -m state --state NEW,ESTABLISHED -m tcp --dport 111 -j ACCEPT
iptables -A OUTPUT -p udp -m state --state NEW,ESTABLISHED -m udp --dport 111 -j ACCEPT
iptables -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -P OUTPUT DROP
4) Configure NFS and export some local directory. Then, mount it with version 3.
mount.nfs -onfsvers=3 127.0.0.1:/srv/cvs /mnt/
You should see permanent expectations created for this.
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds the user-space helper infrastructure. It also
contains the implementation of the FTP helper in user-space.
There's one example file that you can use to configure conntrackd
as user-space connection tracking helper under:
doc/helper/conntrackd.conf
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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