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Filename : network-firewall
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# Description: Can configure firewall. This is restricted because it gives
# privileged access to networking and should only be used with trusted apps.
# Usage: reserved

#include <abstractions/nameservice>

capability net_admin,

/{,usr/}{,s}bin/iptables{,-save,-restore} ixr,
/{,usr/}{,s}bin/ip6tables{,-save,-restore} ixr,
/{,usr/}{,s}bin/iptables-apply ixr,
/{,usr/}{,s}bin/xtables-multi ixr, # ip[6]tables*

# ping - child profile would be nice but seccomp causes problems with that
/{,usr/}{,s}bin/ping ixr,
/{,usr/}{,s}bin/ping6 ixr,
capability net_raw,
capability setuid,
network inet raw,
network inet6 raw,

# iptables (note, we don't want to allow loading modules, but
# we can allow reading @{PROC}/sys/kernel/modprobe). Also,
# snappy needs to have iptable_filter and ip6table_filter loaded,
# they don't autoload.
unix (bind) type=stream addr="@xtables",
@{PROC}/sys/kernel/modprobe r,

@{PROC}/@{pid}/net/ r,
@{PROC}/@{pid}/net/** r,

# sysctl
/{,usr/}{,s}bin/sysctl ixr,
@{PROC}/sys/ r,
@{PROC}/sys/net/ r,
@{PROC}/sys/net/core/ r,
@{PROC}/sys/net/core/** r,
@{PROC}/sys/net/ipv{4,6}/ r,
@{PROC}/sys/net/ipv{4,6}/** r,
@{PROC}/sys/net/netfilter/ r,
@{PROC}/sys/net/netfilter/** r,
@{PROC}/sys/net/nf_conntrack_max r,

# various firewall related sysctl files
@{PROC}/sys/net/ipv4/conf/*/rp_filter w,
@{PROC}/sys/net/ipv{4,6}/conf/*/accept_source_route w,
@{PROC}/sys/net/ipv{4,6}/conf/*/accept_redirects w,
@{PROC}/sys/net/ipv4/icmp_echo_ignore_broadcasts w,
@{PROC}/sys/net/ipv4/icmp_ignore_bogus_error_responses w,
@{PROC}/sys/net/ipv4/icmp_echo_ignore_all w,
@{PROC}/sys/net/ipv4/ip_forward w,
@{PROC}/sys/net/ipv4/conf/*/log_martians w,
@{PROC}/sys/net/ipv4/tcp_syncookies w,
@{PROC}/sys/net/ipv6/conf/*/forwarding w,