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Operating modes and functions
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LANCOM Wireless L-11/IL-11
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EN
ule/passw.required menu. In this case, the password itself is set
with the command passwd.
Login barring
The configuration in the LANCOM Wireless is protected against “brute force
attacks” by barring logins. A brute-force attack is the attempt of an unautho-
rized person to crack a password to gain access to a network, a computer or
another device. In order to do so, a computer can, for example, go through all
the possible combinations of letters and numbers until the right password is
found.
As a measure of protection against such attacks, the maximum allowed num-
ber of unsuccessful attempts to login can be set. If this limit is reached, the
access will be barred for a certain length of time.
These parameters apply globally to all configuration options (outband, Telnet,
TFTP/LANconfig and SNMP). These parameters apply globally to all config-
uration options (Telnet, TFTP/LANconfig and SNMP). If barring is activated
on one port all other ports are automatically barred too.
The following entries are provided in the LANconfig for configuring login bar-
ring in the 'Management' configuration area on the 'Security' tab or under /
Setup/Config-module in the menu:
'Lock configuration after' (Login errors)
'Lock configuration for' (Lock-minutes)
Access control via TCP/IP
Access to the internal functions of the devices through TCP/IP can be
restricted using a special filter list. Internal functions in this case refer to
configuration sessions via LANconfig, WEBconfig, SNMP or Telnet.
This table is empty by default and so access to the router can therefore be
obtained by TCP/IP from computers with any IP address. The filter is acti-
vated when the first IP address with its associated network mask is entered
and from that point on only those IP addresses contained in this initial entry
will be permitted to use the internal functions. The circle of authorized users
can be expanded by inputting further entries. The filter entries can describe
both individual computers and whole networks.
The access list can be found in LANconfig in the 'TCP/IP' configuration sec-
tion on the 'General' tab, or in the /Setup/TCP-IP-module/
Access-list menu.
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