| Commit message (Collapse) | Author | Age | Files | Lines |
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Some distributions, such as Gentoo and Chrome OS, try to link all
programs with `-z now` as a security hardening measure. This breaks
nfct, because nfct cannot satisfy all of the helper modules' symbols.
Therefore nfct implicitly depends on lazy binding.
Have autoconf probe the linker to see if `-z lazy` works, and if so,
use it to link nfct and the helpers.
conntrackd itself is unaffected, and should still work with `-z now`.
Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This allows unicast replies to multicast DNS (mDNS / RFC6762) queries.
These queries are often used when a full-featured mDNS service (such as
avahi-daemon) is not running, or if an mDNS client does not have
permission to bind to port 5353.
Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Here is a patch which adds a userspace conntrack helper for the SSDP
protocol. This is based on the code found at:
http://marc.info/?t=132945775100001&r=1&w=2
I'm not sure how to get my laptop to play at IPv6, so I've not tested
this part, but I've tested the IPv4 section and it works.
Signed-off-by: Ash Hughes <ashley.hughes@blueyonder.co.uk>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds a userspace port of the amanda helper that is
currently implemented in the kernel.
Signed-off-by: Pablo Neira Ayuso <pablo@soleta.eu>
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This patch adds an userspace port of the TFTP helper that is currently
implemented in the kernel. This includes NAT support. It requires a
Linux kernel 3.12.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds an userspace port of the SANE helper that is currently
implemented in the kernel. This requires Linux kernel 3.12 to work.
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This patch adds support for the DHCPv6 helper.
1) nfct helper add dhcpv6 inet6 udp
2) ip6tables -I OUTPUT -t raw -p udp --sport 546 -j CT --helper dhcpv6
3) run conntrackd
You should see:
% conntrack -L exp -f ipv6
279 proto=17 src=:: dst=ff02::1:2 sport=0 dport=546 mask-src=:: mask-dst=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff sport=0 dport=65535 master-src=fe80::221:ccff:fe4a:7f9c master-dst=ff02::1:2 sport=546 dport=547 PERMANENT class=0 helper=dhcpv6
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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