diff options
| -rw-r--r-- | interface-definitions/include/firewall/tcp-flags.xml.i | 17 | ||||
| -rw-r--r-- | python/vyos/firewall.py | 5 | ||||
| -rwxr-xr-x | smoketest/scripts/cli/test_firewall.py | 8 |
3 files changed, 29 insertions, 1 deletions
diff --git a/interface-definitions/include/firewall/tcp-flags.xml.i b/interface-definitions/include/firewall/tcp-flags.xml.i index b99896687..5a7b5a8d3 100644 --- a/interface-definitions/include/firewall/tcp-flags.xml.i +++ b/interface-definitions/include/firewall/tcp-flags.xml.i @@ -114,6 +114,23 @@ </node> </children> </node> + <leafNode name="mss"> + <properties> + <help>Maximum segment size (MSS)</help> + <valueHelp> + <format>u32:1-16384</format> + <description>Maximum segment size</description> + </valueHelp> + <valueHelp> + <format><min>-<max></format> + <description>TCP MSS range (use '-' as delimiter)</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-16384"/> + <validator name="range" argument="--min=1 --max=16384"/> + </constraint> + </properties> + </leafNode> </children> </node> <!-- include end --> diff --git a/python/vyos/firewall.py b/python/vyos/firewall.py index 3e2de4c3f..663c4394a 100644 --- a/python/vyos/firewall.py +++ b/python/vyos/firewall.py @@ -297,6 +297,11 @@ def parse_rule(rule_conf, fw_name, rule_id, ip_name): if tcp_flags: output.append(parse_tcp_flags(tcp_flags)) + # TCP MSS + tcp_mss = dict_search_args(rule_conf, 'tcp', 'mss') + if tcp_mss: + output.append(f'tcp option maxseg size {tcp_mss}') + output.append('counter') if 'set' in rule_conf: diff --git a/smoketest/scripts/cli/test_firewall.py b/smoketest/scripts/cli/test_firewall.py index 4de90e1ec..684a07681 100755 --- a/smoketest/scripts/cli/test_firewall.py +++ b/smoketest/scripts/cli/test_firewall.py @@ -177,6 +177,7 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase): self.verify_nftables(nftables_search, 'ip filter') def test_basic_rules(self): + mss_range = '501-1460' self.cli_set(['firewall', 'name', 'smoketest', 'default-action', 'drop']) self.cli_set(['firewall', 'name', 'smoketest', 'enable-default-log']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'action', 'accept']) @@ -203,6 +204,10 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase): self.cli_set(['firewall', 'name', 'smoketest', 'rule', '4', 'destination', 'port', '22']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '4', 'recent', 'count', '10']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '4', 'recent', 'time', 'minute']) + self.cli_set(['firewall', 'name', 'smoketest', 'rule', '5', 'action', 'accept']) + self.cli_set(['firewall', 'name', 'smoketest', 'rule', '5', 'protocol', 'tcp']) + self.cli_set(['firewall', 'name', 'smoketest', 'rule', '5', 'tcp', 'flags', 'syn']) + self.cli_set(['firewall', 'name', 'smoketest', 'rule', '5', 'tcp', 'mss', mss_range]) self.cli_set(['interfaces', 'ethernet', 'eth0', 'firewall', 'in', 'name', 'smoketest']) @@ -214,7 +219,8 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase): ['tcp flags & (syn | ack) == syn', 'tcp dport { 8888 }', 'log prefix "[smoketest-2-R]" level err', 'ip ttl > 102', 'reject'], ['tcp dport { 22 }', 'limit rate 5/minute', 'return'], ['log prefix "[smoketest-default-D]"','smoketest default-action', 'drop'], - ['tcp dport { 22 }', 'add @RECENT_smoketest_4 { ip saddr limit rate over 10/minute burst 10 packets }', 'drop'] + ['tcp dport { 22 }', 'add @RECENT_smoketest_4 { ip saddr limit rate over 10/minute burst 10 packets }', 'drop'], + [f'tcp flags & syn == syn tcp option maxseg size {mss_range}'] ] self.verify_nftables(nftables_search, 'ip filter') |