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arp50

ARP-table.

ARP is a network level protocol, that transfers IP-addresses (network level addresses) into MAC-addresses (channel level addresses) in TCP/IP networks. ARP table shows IP and MAC addresses of all nodes connected to the server.

In most cases, ICS CUBE uses IP-address for user authentication. But sometimes user can change his workstation’s IP-address (for example, to obtain access for resources that are blocked for him), and MAC-address is harder to change because it’s a unique identifier of the network card. To prevent unauthorized change of IP-address, you can connect MAC-address with IP-address.

To do it, press “Add” - “IP and MAC address” and check the “Bind IP to MAC” checkbox. If user’s workstation is already in list with the proper IP-address, you can just press the “Bind IP to MAC” button. You can also perform such operation in User’s IP-addresses list.

If IP-address is set for a user, then in the line with the corresponding IP its name will be displayed. If you click on it, you will be redirected to his personal page.

ARP table addresses mapping is also used by DHCP-server: it checks the MAC-address to choose the IP for a user.

Note. If, in the ARP table, the User was defined, for example, the MAC address 0a: 1b: 2c: 3d: 4e: 5f and the corresponding IP address 192.168.1.1. And after some time the IP address was changed to another, for example, 10.0.0.1, then in the ICS CUBE for this User two IP addresses associated with one 0a: 1b: 2c: 3d: 4e: 5f will be displayed, since in the ARP system table will have both entries. An incorrect entry in the ARP table will be deleted automatically no later than 1200 seconds.

Log.

In the “Log” table you can find all the system messages from the ARP table. Log is divided to pages, you can use the “Next” and “Previous” buttons to navigate through it, or enter the page number to go to it directly.

Log messages are marked with colour depending on their type. Ordinary system messages are white, system status messages (turning on/off) - green, and errors are red.

In the top right corner there is a search line. You can use it to find specific messages in the log.

Log is always showing messages of the current date. To view other day’s messages, pick a date in the calendar in the top left corner of the module.

If necessary, you can save log into a file using the “Export” button.

arp50.txt · Last modified: 2020/03/11 16:34 by zog