CONFIGURE → VALIDATE → EXPLAIN
Build, convert and review IPv4 ACLs for Cisco IOS, Huawei VRP, H3C Comware and Juniper Junos with deterministic, source-line evidence.
No configuration analyzed yet.
The score has no PASS/FAIL threshold before policy calibration.
Endpoints accept any, host 10.0.0.1, an IPv4 host, or CIDR such as 10.0.0.0/8.
Generated or converted configuration will appear here.
Engineering content reviewed: 30 August 2026 · Rule bundle: 10 high-confidence ACL checks · Scope: IPv4 V1 supported subset
Choose Cisco IOS, Huawei VRP, H3C Comware, Juniper Junos or Arista EOS before pasting the ACL. The parser preserves source lines and reports unsupported syntax instead of guessing. If coverage is incomplete, treat every finding as limited to parsed rules.
The rules screen broad permits, exposed Telnet, unrestricted SSH or SNMP, first-match shadowing, duplicates, deny-only policies and misplaced reachable deny-all entries. Each result includes its rule ID, severity, reason, recommendation and evidence.
Conversion does not replace words directly. It parses supported traffic semantics into a versioned vendor-neutral ACL model, generates the selected target syntax, parses that output again and requires semantic equivalence.
Confirm direction, interface or security-zone attachment, object definitions, implicit behavior, change window and hit counters on the real device. The same rule can have different operational impact at different enforcement points.
V1 intentionally supports one named IPv4 ACL, explicit sequence values, ip/tcp/udp/icmp, any/host/network endpoints, numeric destination ports and logging. Named services, object groups, IPv6, time ranges, fragments, TCP flags and vendor extensions require separate reviewed support.
NIST SP 800-41 Rev. 1 provides firewall policy guidance. First-match behavior and syntax should be checked against the Cisco ACL overview and Juniper filter evaluation documentation.
Port-based findings use the IANA Service Name and Port Number Registry as a protocol indicator. A port number is not proof of the running application, and upstream controls may change exposure.
Analysis is local and deterministic. The Engineering score is a screening summary, not evidence of availability, security or compliance. No PASS/FAIL label is displayed while the score policy remains uncalibrated.
V1 supports a documented IPv4 subset for Cisco IOS named extended ACLs, Huawei VRP advanced named ACLs, H3C Comware advanced named ACLs, Juniper Junos set firewall family inet filters and Arista EOS IPv4 ACL configuration mode.
No. V1 parsing, generation, deterministic findings and scoring run locally in the browser. Raw configuration and findings are not sent to AI or analytics services.
No. It is a deterministic screening aid. Direction, attachment point, topology, object groups, application identity, hit counters and controls outside the pasted ACL can change the engineering conclusion.
The source configuration is parsed into a versioned vendor-neutral IPv4 ACL model, generated in the target syntax, parsed again and compared for semantic equivalence within the supported subset.
Unsupported lines are counted and reported as incomplete parser coverage. They are not silently treated as validated, and findings apply only to successfully parsed rules.
ENGINEERING WORKFLOW
Plan addressing, VLAN capacity, packet size, uplinks, optics, access policy and DNS behavior as one LAN design sequence.
