ELSA LANCOM Business Manuel De L'utilisateur page 236

R60 Description of the menu options
If the router is configured for access to the Internet via an Internet Service Provider, the
DNS server is usually given by the provider. There are then two possible settings in the
router:
'0.0.0.0' is entered as the address of the DNS server. All computers in the local
network can then use the provider's DNS server.
The router's own IP address is entered as the DNS server. Then he uses the DNS
information from the provider not only for its own local network but also forwards
this information (DNS forwarding). Remote stations such as computers that dial in
via remote access can then also access the provider's DNS server. This procedure
is also referred to as DNS forwarding.
DNS-backup With the entry DNS-Backup a second name server can be named, which is used if the
DNS fails.
NBNS-default
The entry NBNS-default (NetBIOS Name Server) is required to announce the NBNS
responsible for their own network for computers that have direct access via PPP to the
router.
NBNS With the entry NBNS-Backup a second name server can be named, which is used if the
NBNS fails.
Table-ARP
This option allows you to display the ARP table (ARP cache), which is managed
automatically for the purpose of mapping IP addresses onto physical terminal addresses.
Individual entries can be removed from this table but no new entries can be entered
manually.
The entries in the ARP table might, for example, have the following appearance if
different devices with different IP addresses (192.168.139.20, 192.168.130.30)
communicated with the router:
IP-address
192.168.130.20
192.168.130.30
ARP-aging-min.
This option allows you to enter a time (from 1 to 99 minutes) at the end of which the ARP
table is automatically updated, i.e. all IP addresses that have not been accessed since
the last automatic update are removed. The default setting is 15 minutes.
TCP-aging-min. If data transfer stops during a TCP connection to the router, e.g. if the user does not enter
any more data during the remote configuration, it will automatically release the TCP
connection on expiry of the time entered here. Possible settings are from 1 to 99 minutes;
The default setting is 15 minutes.
TCP-max.-conn.
The maximum number of allowable connections possible at the same time can be set
here. DEFAULT setting is '0', meaning the same as "any number".
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