The workflow for network access certification systems starts with the end-access network and ends with the full process of obtaining network access rights. It seems simple, but it involves multiple links such as identification, terminal inspection, strategic decision-making, and equipment connection. Understanding the workflow for network access helps businesses to quickly locate problems in deployment and transport dimensions and optimize their experiences.
Step 1: Terminal access and network discovery
The terminal (notebook, cell phone, printer, etc.) is connected to the enterprise network (Cable Insert Exchange Port or Wireless Connect to AP), starting with basic communications on the network layer: access to IP addresses via DHCP (or use static IPs) and ARP parsing. At this point, depending on how you have access, the terminal has different network access status: in 802.1X, the switchboard port is closed by default, the terminal cannot get an IP address, but only carries out the IP protocol communication 802.1X; in Portal mode, the terminal can obtain an IP address but only access Portal server and limited network resources, which are heavily targeted; In the MAC mode, the terminal has normal access to an IP address and the system carries out MAC identification and authentication backstage. This step is a starting point for the access process, where the network discovery state of the terminal directly affects subsequent certification experiences. Many users complain."You're not even online."The problem is often one of failure in DHCP acquisition, error in VLAN allocation, weak wireless signals, etc. rather than access to the system itself.
Step 2: Identification request initiated
The terminal access network is used to initiate authentication requests depending on how they are accessed. In 802.1X, the terminal ' s 802.1X client (or a sublicant in an operating system) initiates the EAPOL (EAP over LAN) certification request to the switchboard, which transmits it to the RADIUS server for web access authentication system; in Portal, the user opens the browser to any page that is selected and redirected to the Portal authentication page, where the user submits the authentication request after entering the account password on the page, the Portal server forwards the request to the authentication system; In MAC mode, the switchboards initiate a request for MAC authentication from the RADIUS server without user operations. The way identity requests are initiated depends on access, with wide variations in user experiences between different modes: 802.1X requires end configuration client, Portal needs manual input and MAC is completely unconscious. Enterprises should take due account of user practices and terminal support when choosing access options.
Step 3: Identification and authorization
After authentication, the system determines the user/endpoint's access to the network based on its profile (local database, AD domain, LDAP, unified identification platform, etc.) whether the user's account number is correct or whether the terminal MAC address is in a white list. Once authentication has been completed, the system makes an authorization judgement as to which level of access to the network should be determined by the user's identity (department, role, position, etc.). The delegation of authority usually includes: VLAN, bandwidth limits, ACL, and session length. Identification and authorization are central to the access process, and systems need to complete validation and decision-making in a short time to ensure speed of authentication response. If identification sources (e.g., AD domain) respond slowly or fail, they can cause certification to be overtimed or failed, affecting user experiences. Thus, high availability and optimization of identity sources are issues that require priority attention during deployment. For large enterprises, it is often recommended that multiple RADIUS servers be deployed for load balance and high availability, avoiding single point failures.
Step 4: terminal compliance check
After authentication is completed, the system conducts end compliance checks (if a compliance check policy is configured). The terminal compliance inspections can be performed before certification, during authentication or after authentication, depending on how the system is configured and accessed. In proxy mode, the proxy software installed at the terminal collects information about the safety status of the terminal (operational system version, patch level, poison-killing software state, software list, process list, external use etc.) and sends it to the access system; in non-agent mode, the system obtains terminal information through network scanning, WMI queries, SNMP etc. The system checks the endpoints for compliance according to predefined compliance strategies: whether the designated anti-virus software has been installed, whether the viral library is in service, whether there are high-risk patches, whether a non-compliance process has been implemented and whether it has access to an outsider. Based on compliance, the system divides the terminal into full compliance, partial compliance, non-compliance levels, corresponding to complete access, restricted access (isolated repair area) and denial of access to three rights. It is important to note that compliance inspections increase the time for certification and that the more items are certified, the slower they need to be balanced between security and experience.
Step 5: Linking strategy to equipment
After the identification, authorization and compliance check is completed, the system makes final access decisions and sends a strategy to network equipment for implementation. Under 802.1X, the system returns to the switchboard acceptance message via RADIUS protocol, which carries authorized properties such as VLAN, ACL, bandwidth, and allows the switchboard to configure ports based on these attributes, open network access; under Portal mode, the system informs the Portal server and the switch/AC release traffic through the terminal, with regular access to the network; In the MAC mode, the system returns authentication acceptance through RADIUS and exchanges access to its counterpart. For non-compliant terminals, the system sends a isolation strategy: distribution of the terminal to VLAN insulated, with only access to repair resources such as patch servers, poison-killers, etc., and no access to other resources of the enterprise’s intranet. Common problems include: RADIFUS properties are not supported by the device (which results in a policy not being effective), VLAN configuration errors (which leads to an end-point not having access to the correct IP), equipment connections delays (which leads to a terminal being connected but the strategy not yet in effect).
Step 6: online status monitoring and dynamic adjustment
The terminal is in online status when it has access to the network. The system continuously monitors the end ' s online state and security: tracking the terminal ' s online time and traffic via RADIUS billing (Accounding-Start/Interim/Stop); regularly reporting the terminal safety status through proxy software (whether the poison-killer software is closed or new non-compliant software installed); monitoring anomalies through web traffic. When the terminal ' s security state changes (e.g., users shut down the anti-virus software, access the irregular Udisk), the system can dynamically adjust its network privileges: from full access to restricted access, or directly disconnects the network. Online state monitoring and dynamic adjustment are continuous control capabilities for network access, which allows access control to be different"A certified life."This capability is particularly important for inner network security: many safety incidents occur not in the instant of access, but in the post-end access process. The system also supports detection of abnormal behaviour: a multi-entry account, an irregular terminal traffic flow, irregular time access etc., and prompt warning or restriction.
Step 7: End of session on down line
The terminal disconnects the network (extraction of the web, break WiFi, switch off), cancels it voluntarily or ends the access session when the session is time-consuming. Under 802.1X, after the switch has detected a break to the port, the system closes the session and releases the resources by sending a bill stop message to the RADIUS server; under Portal, after there is no flow of terminal traffic for some time, the system is determined to be downline and release authorization; under MAC mode, the switch detects the loss of the MAC address and alerts the system down. The downlink process allows the system to recover the terminal ' s network resources (VLAN, ACL, bandwidth etc.) for other end use. At the same time, the system generates complete access session records, including access times, access locations, terminal information, user identity, compliance status, online duration, and reasons for downlines, which are used for auditing and retroactive purposes. The downlink processing accuracy is important: if the terminal is offline but the system does not release resources in a timely manner, it may result in resource leakage (inflated number of online users, bandwidth unreleased); if the end is not down but the system misdirected, the user network may be disrupted.
From terminal access, identification, authorization judgement, end compliance check, strategy release to online monitoring and downlink processing, the web-access authentication system has a combination of workflows. Each step is related to security and experience: certification needs to be fast and steady, compliance checks are accurate and timely and reliable, and online monitoring must continue to be effective. Understanding this complete process link allows for selection of a network-access certification system appropriate to their own enterprise, as well as rapid positioning problems in deployment and transport, allowing network access to truly take advantage of Intranet security control. For enterprises, it is necessary to establish each part of the process so that access can be made from within the network."Deployment"Changed"It really works. It's working."。