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-rw-r--r--data/templates/snmp/etc.snmpd.conf.j231
-rw-r--r--data/templates/snmp/override.conf.j23
-rw-r--r--interface-definitions/snmp.xml.in25
-rwxr-xr-xsmoketest/scripts/cli/test_service_snmp.py22
-rwxr-xr-xsrc/conf_mode/snmp.py4
-rwxr-xr-xsrc/migration-scripts/snmp/2-to-357
6 files changed, 128 insertions, 14 deletions
diff --git a/data/templates/snmp/etc.snmpd.conf.j2 b/data/templates/snmp/etc.snmpd.conf.j2
index 47bf6878f..155ee2822 100644
--- a/data/templates/snmp/etc.snmpd.conf.j2
+++ b/data/templates/snmp/etc.snmpd.conf.j2
@@ -59,28 +59,47 @@ agentaddress unix:/run/snmpd.socket{{ ',' ~ options | join(',') if options is vy
{% if comm_config.client is vyos_defined %}
{% for client in comm_config.client %}
{% if client | is_ipv4 %}
-{{ comm_config.authorization }}community {{ comm }} {{ client }}
+{{ comm_config.authorization }}community {{ comm }} {{ client }} -V RESTRICTED
{% elif client | is_ipv6 %}
-{{ comm_config.authorization }}community6 {{ comm }} {{ client }}
+{{ comm_config.authorization }}community6 {{ comm }} {{ client }} -V RESTRICTED
{% endif %}
{% endfor %}
{% endif %}
{% if comm_config.network is vyos_defined %}
{% for network in comm_config.network %}
{% if network | is_ipv4 %}
-{{ comm_config.authorization }}community {{ comm }} {{ network }}
+{{ comm_config.authorization }}community {{ comm }} {{ network }} -V RESTRICTED
{% elif network | is_ipv6 %}
-{{ comm_config.authorization }}community6 {{ comm }} {{ network }}
+{{ comm_config.authorization }}community6 {{ comm }} {{ network }} -V RESTRICTED
{% endif %}
{% endfor %}
{% endif %}
{% if comm_config.client is not vyos_defined and comm_config.network is not vyos_defined %}
-{{ comm_config.authorization }}community {{ comm }}
-{{ comm_config.authorization }}community6 {{ comm }}
+{{ comm_config.authorization }}community {{ comm }} -V RESTRICTED
+{{ comm_config.authorization }}community6 {{ comm }} -V RESTRICTED
{% endif %}
{% endfor %}
{% endif %}
+# Default RESTRICTED view
+view RESTRICTED included .1 80
+{% if 'ip-route-table' not in oid_enable %}
+# ipRouteTable oid: excluded
+view RESTRICTED excluded .1.3.6.1.2.1.4.21
+{% endif %}
+{% if 'ip-net-to-media-table' not in oid_enable %}
+# ipNetToMediaTable oid: excluded
+view RESTRICTED excluded .1.3.6.1.2.1.4.22
+{% endif %}
+{% if 'ip-net-to-physical-phys-address' not in oid_enable %}
+# ipNetToPhysicalPhysAddress oid: excluded
+view RESTRICTED excluded .1.3.6.1.2.1.4.35
+{% endif %}
+{% if 'ip-forward' not in oid_enable %}
+# ipForward oid: excluded
+view RESTRICTED excluded .1.3.6.1.2.1.4.24
+{% endif %}
+
{% if contact is vyos_defined %}
# system contact information
SysContact {{ contact }}
diff --git a/data/templates/snmp/override.conf.j2 b/data/templates/snmp/override.conf.j2
index 5d787de86..443ee64db 100644
--- a/data/templates/snmp/override.conf.j2
+++ b/data/templates/snmp/override.conf.j2
@@ -1,5 +1,4 @@
{% set vrf_command = 'ip vrf exec ' ~ vrf ~ ' ' if vrf is vyos_defined else '' %}
-{% set oid_route_table = ' ' if oid_enable is vyos_defined('route-table') else '-I -ipCidrRouteTable,inetCidrRouteTable' %}
[Unit]
StartLimitIntervalSec=0
After=vyos-router.service
@@ -8,7 +7,7 @@ After=vyos-router.service
Environment=
Environment="MIBDIRS=/usr/share/snmp/mibs:/usr/share/snmp/mibs/iana:/usr/share/snmp/mibs/ietf:/usr/share/vyos/mibs"
ExecStart=
-ExecStart={{ vrf_command }}/usr/sbin/snmpd -LS0-5d -Lf /dev/null -u Debian-snmp -g Debian-snmp {{ oid_route_table }} -f -p /run/snmpd.pid
+ExecStart={{ vrf_command }}/usr/sbin/snmpd -LS0-5d -Lf /dev/null -u Debian-snmp -g Debian-snmp -f -p /run/snmpd.pid
Restart=always
RestartSec=10
diff --git a/interface-definitions/snmp.xml.in b/interface-definitions/snmp.xml.in
index 7ec60b2e7..bb6e91167 100644
--- a/interface-definitions/snmp.xml.in
+++ b/interface-definitions/snmp.xml.in
@@ -123,18 +123,31 @@
</leafNode>
<leafNode name="oid-enable">
<properties>
- <help>Enable specific OIDs</help>
+ <help>Enable specific OIDs that by default are disable</help>
<completionHelp>
- <list>route-table</list>
+ <list>ip-forward ip-route-table ip-net-to-media-table ip-net-to-physical-phys-address</list>
</completionHelp>
<valueHelp>
- <format>route-table</format>
- <description>Enable routing table OIDs (ipCidrRouteTable inetCidrRouteTable)</description>
+ <format>ip-forward</format>
+ <description>Enable oid .1.3.6.1.2.1.4.24</description>
+ </valueHelp>
+ <valueHelp>
+ <format>ip-route-table</format>
+ <description>Enable oid .1.3.6.1.2.1.4.21</description>
+ </valueHelp>
+ <valueHelp>
+ <format>ip-net-to-media-table</format>
+ <description>Enable oid .1.3.6.1.2.1.4.22</description>
+ </valueHelp>
+ <valueHelp>
+ <format>ip-net-to-physical-phys-address</format>
+ <description>Enable oid .1.3.6.1.2.1.4.35</description>
</valueHelp>
<constraint>
- <regex>(route-table)</regex>
+ <regex>(ip-forward|ip-route-table|ip-net-to-media-table|ip-net-to-physical-phys-address)</regex>
</constraint>
- <constraintErrorMessage>OID must be 'route-table'</constraintErrorMessage>
+ <constraintErrorMessage>OID must be one of the liste options</constraintErrorMessage>
+ <multi/>
</properties>
</leafNode>
#include <include/snmp/protocol.xml.i>
diff --git a/smoketest/scripts/cli/test_service_snmp.py b/smoketest/scripts/cli/test_service_snmp.py
index e80c689cc..b18b9e7a1 100755
--- a/smoketest/scripts/cli/test_service_snmp.py
+++ b/smoketest/scripts/cli/test_service_snmp.py
@@ -123,6 +123,28 @@ class TestSNMPService(VyOSUnitTestSHIM.TestCase):
self.assertTrue(process_named_running(PROCESS_NAME))
self.cli_delete(['interfaces', 'dummy', dummy_if])
+ ## Check communities and default view RESTRICTED
+ for auth in ['ro', 'rw']:
+ community = 'VyOS' + auth
+ for addr in clients:
+ if is_ipv4(addr):
+ entry = auth + 'community ' + community + ' ' + addr + ' -V'
+ else:
+ entry = auth + 'community6 ' + community + ' ' + addr + ' -V'
+ config = get_config_value(entry)
+ expected = 'RESTRICTED'
+ self.assertIn(expected, config)
+ for addr in networks:
+ if is_ipv4(addr):
+ entry = auth + 'community ' + community + ' ' + addr + ' -V'
+ else:
+ entry = auth + 'community6 ' + community + ' ' + addr + ' -V'
+ config = get_config_value(entry)
+ expected = 'RESTRICTED'
+ self.assertIn(expected, config)
+ # And finally check global entry for RESTRICTED view
+ config = get_config_value('view RESTRICTED included .1')
+ self.assertIn('80', config)
def test_snmpv3_sha(self):
# Check if SNMPv3 can be configured with SHA authentication
diff --git a/src/conf_mode/snmp.py b/src/conf_mode/snmp.py
index 5cd24db32..addfb9e26 100755
--- a/src/conf_mode/snmp.py
+++ b/src/conf_mode/snmp.py
@@ -166,6 +166,10 @@ def verify(snmp):
if 'community' not in trap_config:
raise ConfigError(f'Trap target "{trap}" requires a community to be set!')
+ if 'oid_enable' in snmp:
+ Warning(f'Custom oids are enabled and may lead to system instability and high resource consumption')
+
+
verify_vrf(snmp)
# bail out early if SNMP v3 is not configured
diff --git a/src/migration-scripts/snmp/2-to-3 b/src/migration-scripts/snmp/2-to-3
new file mode 100755
index 000000000..5f8d9c88d
--- /dev/null
+++ b/src/migration-scripts/snmp/2-to-3
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2022 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# T4857: Implement FRR SNMP recomendations
+# cli changes from:
+# set service snmp oid-enable route-table
+# To
+# set service snmp oid-enable ip-forward
+
+import re
+
+from sys import argv
+from sys import exit
+
+from vyos.configtree import ConfigTree
+from vyos.ifconfig import Section
+
+if (len(argv) < 1):
+ print("Must specify file name!")
+ exit(1)
+
+file_name = argv[1]
+
+with open(file_name, 'r') as f:
+ config_file = f.read()
+
+base = ['service snmp']
+config = ConfigTree(config_file)
+
+if not config.exists(base):
+ # Nothing to do
+ exit(0)
+
+if config.exists(base + ['oid-enable']):
+ config.delete(base + ['oid-enable'])
+ config.set(base + ['oid-enable'], 'ip-forward')
+
+
+try:
+ with open(file_name, 'w') as f:
+ f.write(config.to_string())
+except OSError as e:
+ print("Failed to save the modified config: {}".format(e))
+ exit(1)
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-21 21:24:38 +0000