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538daf7f3a
When the host is configured with very restrictive firewall (default policy is DROP for all chains, including OUTPUT), the bridge driver for Linux adds netfilter entries to allow DHCP and DNS requests to go from the VM to the dnsmasq of the host. The issue that this commit fixes is the fact that a DROP policy on the OUTPUT chain blocks the DHCP replies from the host’s dnsmasq to the VM. As DHCP replies are sent in UDP, they are not caught by any --ctstate ESTABLISHED rule and so, need to be explicitly allowed. Signed-off-by: Lénaïc Huard <lenaic@lhuard.fr.eu.org>
118 lines
6.2 KiB
C
118 lines
6.2 KiB
C
/*
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* viriptables.h: helper APIs for managing iptables
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*
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* Copyright (C) 2007, 2008 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Mark McLoughlin <markmc@redhat.com>
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*/
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#ifndef __QEMUD_IPTABLES_H__
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# define __QEMUD_IPTABLES_H__
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# include "virsocketaddr.h"
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int iptablesAddTcpInput (int family,
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const char *iface,
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int port);
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int iptablesRemoveTcpInput (int family,
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const char *iface,
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int port);
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int iptablesAddUdpInput (int family,
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const char *iface,
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int port);
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int iptablesRemoveUdpInput (int family,
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const char *iface,
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int port);
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int iptablesAddUdpOutput (int family,
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const char *iface,
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int port);
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int iptablesRemoveUdpOutput (int family,
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const char *iface,
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int port);
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int iptablesAddForwardAllowOut (virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev);
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int iptablesRemoveForwardAllowOut (virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev);
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int iptablesAddForwardAllowRelatedIn(virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev);
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int iptablesRemoveForwardAllowRelatedIn(virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev);
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int iptablesAddForwardAllowIn (virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev);
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int iptablesRemoveForwardAllowIn (virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev);
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int iptablesAddForwardAllowCross (int family,
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const char *iface);
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int iptablesRemoveForwardAllowCross (int family,
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const char *iface);
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int iptablesAddForwardRejectOut (int family,
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const char *iface);
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int iptablesRemoveForwardRejectOut (int family,
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const char *iface);
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int iptablesAddForwardRejectIn (int family,
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const char *iface);
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int iptablesRemoveForwardRejectIn (int family,
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const char *iface);
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int iptablesAddForwardMasquerade (virSocketAddr *netaddr,
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unsigned int prefix,
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const char *physdev,
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virSocketAddrRangePtr addr,
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virPortRangePtr port,
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const char *protocol);
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int iptablesRemoveForwardMasquerade (virSocketAddr *netaddr,
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unsigned int prefix,
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const char *physdev,
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virSocketAddrRangePtr addr,
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virPortRangePtr port,
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const char *protocol);
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int iptablesAddDontMasquerade (virSocketAddr *netaddr,
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unsigned int prefix,
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const char *physdev,
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const char *destaddr);
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int iptablesRemoveDontMasquerade (virSocketAddr *netaddr,
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unsigned int prefix,
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const char *physdev,
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const char *destaddr);
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int iptablesAddOutputFixUdpChecksum (const char *iface,
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int port);
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int iptablesRemoveOutputFixUdpChecksum (const char *iface,
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int port);
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#endif /* __QEMUD_IPTABLES_H__ */
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