diff options
Diffstat (limited to 'src/conf_mode/firewall.py')
| -rwxr-xr-x | src/conf_mode/firewall.py | 308 |
1 files changed, 102 insertions, 206 deletions
diff --git a/src/conf_mode/firewall.py b/src/conf_mode/firewall.py index f68acfe02..c3b1ee015 100755 --- a/src/conf_mode/firewall.py +++ b/src/conf_mode/firewall.py @@ -23,7 +23,6 @@ from sys import exit from vyos.base import Warning from vyos.config import Config -from vyos.configdict import dict_merge from vyos.configdict import node_changed from vyos.configdiff import get_config_diff, Diff from vyos.configdep import set_dependents, call_dependents @@ -31,13 +30,12 @@ from vyos.configdep import set_dependents, call_dependents from vyos.firewall import fqdn_config_parse from vyos.firewall import geoip_update from vyos.template import render -from vyos.util import call -from vyos.util import cmd -from vyos.util import dict_search_args -from vyos.util import dict_search_recursive -from vyos.util import process_named_running -from vyos.util import rc_cmd -from vyos.xml import defaults +from vyos.utils.process import call +from vyos.utils.process import cmd +from vyos.utils.dict import dict_search_args +from vyos.utils.dict import dict_search_recursive +from vyos.utils.process import process_named_running +from vyos.utils.process import rc_cmd from vyos import ConfigError from vyos import airbag airbag.enable() @@ -56,7 +54,6 @@ sysfs_config = { 'log_martians': {'sysfs': '/proc/sys/net/ipv4/conf/all/log_martians'}, 'receive_redirects': {'sysfs': '/proc/sys/net/ipv4/conf/*/accept_redirects'}, 'send_redirects': {'sysfs': '/proc/sys/net/ipv4/conf/*/send_redirects'}, - 'source_validation': {'sysfs': '/proc/sys/net/ipv4/conf/*/rp_filter', 'disable': '0', 'strict': '1', 'loose': '2'}, 'syn_cookies': {'sysfs': '/proc/sys/net/ipv4/tcp_syncookies'}, 'twa_hazards_protection': {'sysfs': '/proc/sys/net/ipv4/tcp_rfc1337'} } @@ -65,7 +62,8 @@ valid_groups = [ 'address_group', 'domain_group', 'network_group', - 'port_group' + 'port_group', + 'interface_group' ] nested_group_types = [ @@ -96,19 +94,22 @@ def geoip_updated(conf, firewall): updated = False for key, path in dict_search_recursive(firewall, 'geoip'): - set_name = f'GEOIP_CC_{path[1]}_{path[3]}' - if path[0] == 'name': + set_name = f'GEOIP_CC_{path[1]}_{path[2]}_{path[4]}' + if (path[0] == 'ipv4'): out['name'].append(set_name) - elif path[0] == 'ipv6_name': + elif (path[0] == 'ipv6'): + set_name = f'GEOIP_CC6_{path[1]}_{path[2]}_{path[4]}' out['ipv6_name'].append(set_name) + updated = True if 'delete' in node_diff: for key, path in dict_search_recursive(node_diff['delete'], 'geoip'): - set_name = f'GEOIP_CC_{path[1]}_{path[3]}' - if path[0] == 'name': + set_name = f'GEOIP_CC_{path[1]}_{path[2]}_{path[4]}' + if (path[0] == 'ipv4'): out['deleted_name'].append(set_name) - elif path[0] == 'ipv6-name': + elif (path[0] == 'ipv6'): + set_name = f'GEOIP_CC_{path[1]}_{path[2]}_{path[4]}' out['deleted_ipv6_name'].append(set_name) updated = True @@ -124,54 +125,17 @@ def get_config(config=None): conf = Config() base = ['firewall'] - firewall = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True, - no_tag_node_value_mangle=True) - - # We have gathered the dict representation of the CLI, but there are - # default options which we need to update into the dictionary retrived. - # XXX: T2665: we currently have no nice way for defaults under tag - # nodes, thus we load the defaults "by hand" - default_values = defaults(base) - for tmp in ['name', 'ipv6_name']: - if tmp in default_values: - del default_values[tmp] - - if 'zone' in default_values: - del default_values['zone'] - - firewall = dict_merge(default_values, firewall) - - # Merge in defaults for IPv4 ruleset - if 'name' in firewall: - default_values = defaults(base + ['name']) - for name in firewall['name']: - firewall['name'][name] = dict_merge(default_values, - firewall['name'][name]) - - # Merge in defaults for IPv6 ruleset - if 'ipv6_name' in firewall: - default_values = defaults(base + ['ipv6-name']) - for ipv6_name in firewall['ipv6_name']: - firewall['ipv6_name'][ipv6_name] = dict_merge(default_values, - firewall['ipv6_name'][ipv6_name]) - - if 'zone' in firewall: - default_values = defaults(base + ['zone']) - for zone in firewall['zone']: - firewall['zone'][zone] = dict_merge(default_values, firewall['zone'][zone]) + firewall = conf.get_config_dict(base, key_mangling=('-', '_'), + no_tag_node_value_mangle=True, + get_first_key=True, + with_recursive_defaults=True) + firewall['group_resync'] = bool('group' in firewall or node_changed(conf, base + ['group'])) if firewall['group_resync']: # Update nat and policy-route as firewall groups were updated set_dependents('group_resync', conf) - if 'config_trap' in firewall and firewall['config_trap'] == 'enable': - diff = get_config_diff(conf) - firewall['trap_diff'] = diff.get_child_nodes_diff_str(base) - firewall['trap_targets'] = conf.get_config_dict(['service', 'snmp', 'trap-target'], - key_mangling=('-', '_'), get_first_key=True, - no_tag_node_value_mangle=True) - firewall['geoip_updated'] = geoip_updated(conf, firewall) fqdn_config_parse(firewall) @@ -190,11 +154,20 @@ def verify_rule(firewall, rule_conf, ipv6): raise ConfigError('jump-target defined, but action jump needed and it is not defined') target = rule_conf['jump_target'] if not ipv6: - if target not in dict_search_args(firewall, 'name'): + if target not in dict_search_args(firewall, 'ipv4', 'name'): raise ConfigError(f'Invalid jump-target. Firewall name {target} does not exist on the system') else: - if target not in dict_search_args(firewall, 'ipv6_name'): - raise ConfigError(f'Invalid jump-target. Firewall ipv6-name {target} does not exist on the system') + if target not in dict_search_args(firewall, 'ipv6', 'name'): + raise ConfigError(f'Invalid jump-target. Firewall ipv6 name {target} does not exist on the system') + + if 'queue_options' in rule_conf: + if 'queue' not in rule_conf['action']: + raise ConfigError('queue-options defined, but action queue needed and it is not defined') + if 'fanout' in rule_conf['queue_options'] and ('queue' not in rule_conf or '-' not in rule_conf['queue']): + raise ConfigError('queue-options fanout defined, then queue needs to be defined as a range') + + if 'queue' in rule_conf and 'queue' not in rule_conf['action']: + raise ConfigError('queue defined, but action queue needed and it is not defined') if 'fragment' in rule_conf: if {'match_frag', 'match_non_frag'} <= set(rule_conf['fragment']): @@ -272,6 +245,24 @@ def verify_rule(firewall, rule_conf, ipv6): if rule_conf['protocol'] not in ['tcp', 'udp', 'tcp_udp']: raise ConfigError('Protocol must be tcp, udp, or tcp_udp when specifying a port or port-group') + if 'port' in side_conf and dict_search_args(side_conf, 'group', 'port_group'): + raise ConfigError(f'{side} port-group and port cannot both be defined') + + if 'log_options' in rule_conf: + if 'log' not in rule_conf or 'enable' not in rule_conf['log']: + raise ConfigError('log-options defined, but log is not enable') + + if 'snapshot_length' in rule_conf['log_options'] and 'group' not in rule_conf['log_options']: + raise ConfigError('log-options snapshot-length defined, but log group is not define') + + if 'queue_threshold' in rule_conf['log_options'] and 'group' not in rule_conf['log_options']: + raise ConfigError('log-options queue-threshold defined, but log group is not define') + + for direction in ['inbound_interface','outbound_interface']: + if direction in rule_conf: + if 'interface_name' in rule_conf[direction] and 'interface_group' in rule_conf[direction]: + raise ConfigError(f'Cannot specify both interface-group and interface-name for {direction}') + def verify_nested_group(group_name, group, groups, seen): if 'include' not in group: return @@ -289,10 +280,6 @@ def verify_nested_group(group_name, group, groups, seen): verify_nested_group(g, groups[g], groups, seen) def verify(firewall): - if 'config_trap' in firewall and firewall['config_trap'] == 'enable': - if not firewall['trap_targets']: - raise ConfigError(f'Firewall config-trap enabled but "service snmp trap-target" is not defined') - if 'group' in firewall: for group_type in nested_group_types: if group_type in firewall['group']: @@ -300,95 +287,45 @@ def verify(firewall): for group_name, group in groups.items(): verify_nested_group(group_name, group, groups, []) - for name in ['name', 'ipv6_name']: - if name in firewall: - for name_id, name_conf in firewall[name].items(): - if 'jump' in name_conf['default_action'] and 'default_jump_target' not in name_conf: - raise ConfigError('default-action set to jump, but no default-jump-target specified') - if 'default_jump_target' in name_conf: - target = name_conf['default_jump_target'] - if 'jump' not in name_conf['default_action']: - raise ConfigError('default-jump-target defined,but default-action jump needed and it is not defined') - if name_conf['default_jump_target'] == name_id: - raise ConfigError(f'Loop detected on default-jump-target.') - ## Now need to check that default-jump-target exists (other firewall chain/name) - if target not in dict_search_args(firewall, name): - raise ConfigError(f'Invalid jump-target. Firewall {name} {target} does not exist on the system') - - if 'rule' in name_conf: - for rule_id, rule_conf in name_conf['rule'].items(): - verify_rule(firewall, rule_conf, name == 'ipv6_name') - - if 'interface' in firewall: - for ifname, if_firewall in firewall['interface'].items(): - # verify ifname needs to be disabled, dynamic devices come up later - # verify_interface_exists(ifname) - - for direction in ['in', 'out', 'local']: - name = dict_search_args(if_firewall, direction, 'name') - ipv6_name = dict_search_args(if_firewall, direction, 'ipv6_name') - - if name and dict_search_args(firewall, 'name', name) == None: - raise ConfigError(f'Invalid firewall name "{name}" referenced on interface {ifname}') - - if ipv6_name and dict_search_args(firewall, 'ipv6_name', ipv6_name) == None: - raise ConfigError(f'Invalid firewall ipv6-name "{ipv6_name}" referenced on interface {ifname}') - - local_zone = False - zone_interfaces = [] - - if 'zone' in firewall: - for zone, zone_conf in firewall['zone'].items(): - if 'local_zone' not in zone_conf and 'interface' not in zone_conf: - raise ConfigError(f'Zone "{zone}" has no interfaces and is not the local zone') - - if 'local_zone' in zone_conf: - if local_zone: - raise ConfigError('There cannot be multiple local zones') - if 'interface' in zone_conf: - raise ConfigError('Local zone cannot have interfaces assigned') - if 'intra_zone_filtering' in zone_conf: - raise ConfigError('Local zone cannot use intra-zone-filtering') - local_zone = True - - if 'interface' in zone_conf: - found_duplicates = [intf for intf in zone_conf['interface'] if intf in zone_interfaces] - - if found_duplicates: - raise ConfigError(f'Interfaces cannot be assigned to multiple zones') - - zone_interfaces += zone_conf['interface'] - - if 'intra_zone_filtering' in zone_conf: - intra_zone = zone_conf['intra_zone_filtering'] - - if len(intra_zone) > 1: - raise ConfigError('Only one intra-zone-filtering action must be specified') - - if 'firewall' in intra_zone: - v4_name = dict_search_args(intra_zone, 'firewall', 'name') - if v4_name and not dict_search_args(firewall, 'name', v4_name): - raise ConfigError(f'Firewall name "{v4_name}" does not exist') - - v6_name = dict_search_args(intra_zone, 'firewall', 'ipv6_name') - if v6_name and not dict_search_args(firewall, 'ipv6_name', v6_name): - raise ConfigError(f'Firewall ipv6-name "{v6_name}" does not exist') - - if not v4_name and not v6_name: - raise ConfigError('No firewall names specified for intra-zone-filtering') - - if 'from' in zone_conf: - for from_zone, from_conf in zone_conf['from'].items(): - if from_zone not in firewall['zone']: - raise ConfigError(f'Zone "{zone}" refers to a non-existent or deleted zone "{from_zone}"') - - v4_name = dict_search_args(from_conf, 'firewall', 'name') - if v4_name and not dict_search_args(firewall, 'name', v4_name): - raise ConfigError(f'Firewall name "{v4_name}" does not exist') - - v6_name = dict_search_args(from_conf, 'firewall', 'ipv6_name') - if v6_name and not dict_search_args(firewall, 'ipv6_name', v6_name): - raise ConfigError(f'Firewall ipv6-name "{v6_name}" does not exist') + if 'ipv4' in firewall: + for name in ['name','forward','input','output']: + if name in firewall['ipv4']: + for name_id, name_conf in firewall['ipv4'][name].items(): + if 'jump' in name_conf['default_action'] and 'default_jump_target' not in name_conf: + raise ConfigError('default-action set to jump, but no default-jump-target specified') + if 'default_jump_target' in name_conf: + target = name_conf['default_jump_target'] + if 'jump' not in name_conf['default_action']: + raise ConfigError('default-jump-target defined, but default-action jump needed and it is not defined') + if name_conf['default_jump_target'] == name_id: + raise ConfigError(f'Loop detected on default-jump-target.') + ## Now need to check that default-jump-target exists (other firewall chain/name) + if target not in dict_search_args(firewall['ipv4'], 'name'): + raise ConfigError(f'Invalid jump-target. Firewall name {target} does not exist on the system') + + if 'rule' in name_conf: + for rule_id, rule_conf in name_conf['rule'].items(): + verify_rule(firewall, rule_conf, False) + + if 'ipv6' in firewall: + for name in ['name','forward','input','output']: + if name in firewall['ipv6']: + for name_id, name_conf in firewall['ipv6'][name].items(): + if 'jump' in name_conf['default_action'] and 'default_jump_target' not in name_conf: + raise ConfigError('default-action set to jump, but no default-jump-target specified') + if 'default_jump_target' in name_conf: + target = name_conf['default_jump_target'] + if 'jump' not in name_conf['default_action']: + raise ConfigError('default-jump-target defined, but default-action jump needed and it is not defined') + if name_conf['default_jump_target'] == name_id: + raise ConfigError(f'Loop detected on default-jump-target.') + ## Now need to check that default-jump-target exists (other firewall chain/name) + if target not in dict_search_args(firewall['ipv6'], 'name'): + raise ConfigError(f'Invalid jump-target. Firewall name {target} does not exist on the system') + + if 'rule' in name_conf: + for rule_id, rule_conf in name_conf['rule'].items(): + verify_rule(firewall, rule_conf, True) return None @@ -396,18 +333,16 @@ def generate(firewall): if not os.path.exists(nftables_conf): firewall['first_install'] = True - if 'zone' in firewall: - for local_zone, local_zone_conf in firewall['zone'].items(): - if 'local_zone' not in local_zone_conf: - continue - - local_zone_conf['from_local'] = {} + # Determine if conntrack is needed + firewall['ipv4_conntrack_action'] = 'return' + firewall['ipv6_conntrack_action'] = 'return' - for zone, zone_conf in firewall['zone'].items(): - if zone == local_zone or 'from' not in zone_conf: - continue - if local_zone in zone_conf['from']: - local_zone_conf['from_local'][zone] = zone_conf['from'][local_zone] + for rules, path in dict_search_recursive(firewall, 'rule'): + if any(('state' in rule_conf or 'connection_status' in rule_conf) for rule_conf in rules.values()): + if path[0] == 'ipv4': + firewall['ipv4_conntrack_action'] = 'accept' + elif path[0] == 'ipv6': + firewall['ipv6_conntrack_action'] = 'accept' render(nftables_conf, 'firewall/nftables.j2', firewall) return None @@ -417,9 +352,8 @@ def apply_sysfs(firewall): paths = glob(conf['sysfs']) value = None - if name in firewall: - conf_value = firewall[name] - + if name in firewall['global_options']: + conf_value = firewall['global_options'][name] if conf_value in conf: value = conf[conf_value] elif conf_value == 'enable': @@ -432,42 +366,6 @@ def apply_sysfs(firewall): with open(path, 'w') as f: f.write(value) -def post_apply_trap(firewall): - if 'first_install' in firewall: - return None - - if 'config_trap' not in firewall or firewall['config_trap'] != 'enable': - return None - - if not process_named_running('snmpd'): - return None - - trap_username = os.getlogin() - - for host, target_conf in firewall['trap_targets'].items(): - community = target_conf['community'] if 'community' in target_conf else 'public' - port = int(target_conf['port']) if 'port' in target_conf else 162 - - base_cmd = f'snmptrap -v2c -c {community} {host}:{port} 0 {snmp_trap_mib}::{snmp_trap_name} ' - - for change_type, changes in firewall['trap_diff'].items(): - for path_str, value in changes.items(): - objects = [ - f'mgmtEventUser s "{trap_username}"', - f'mgmtEventSource i {snmp_event_source}', - f'mgmtEventType i {snmp_change_type[change_type]}' - ] - - if change_type == 'add': - objects.append(f'mgmtEventCurrCfg s "{path_str} {value}"') - elif change_type == 'delete': - objects.append(f'mgmtEventPrevCfg s "{path_str} {value}"') - elif change_type == 'change': - objects.append(f'mgmtEventPrevCfg s "{path_str} {value[0]}"') - objects.append(f'mgmtEventCurrCfg s "{path_str} {value[1]}"') - - cmd(base_cmd + ' '.join(objects)) - def apply(firewall): install_result, output = rc_cmd(f'nft -f {nftables_conf}') if install_result == 1: @@ -492,8 +390,6 @@ def apply(firewall): print('Updating GeoIP. Please wait...') geoip_update(firewall) - post_apply_trap(firewall) - return None if __name__ == '__main__': |