Document limitations when in use with INPUT until we found a better solution. Also fix up indent in the example section. Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx> --- extensions/libxt_cgroup.man | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/extensions/libxt_cgroup.man b/extensions/libxt_cgroup.man index 456a031..d0eb09b 100644 --- a/extensions/libxt_cgroup.man +++ b/extensions/libxt_cgroup.man @@ -2,13 +2,21 @@ [\fB!\fP] \fB\-\-cgroup\fP \fIfwid\fP Match corresponding cgroup for this packet. -Can be used to assign particular firewall policies for aggregated -task/jobs on the system. This allows for more fine-grained firewall -policies that only match for a subset of the system's processes. -fwid is the maker set through the net_cls cgroup's id. +Can be used in the OUTPUT chain to assign particular firewall +policies for aggregated task/jobs on the system. This allows +for more fine-grained firewall policies that only match for a +subset of the system's processes. fwid is the maker set through +the net_cls cgroup's id. + +\fBIMPORTANT\fP: when being used in the INPUT chain, the cgroup +matcher is currently only of limited functionality, meaning it +will only match on packets that are processed for local sockets +through early socket demuxing. Therefore, general usage on the +INPUT chain is disadviced unless the implications are well +understood. .PP Example: -.PP +.IP iptables \-A OUTPUT \-p tcp \-\-sport 80 \-m cgroup ! \-\-cgroup 1 \-j DROP .PP -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
