elmeg T444 User Manual page 11

Rou ter functions
Portmapping
You wish to ac cess your PC from an ex ter nal lo ca ti on via In ter net. Nor mal ly, ac cess via the fi re wall should be pro hi -
bi ted. When you use port map ping, ac cess to a rou ter port that you have en ab led is per mit ted from an ex ter nal lo ca ti -
on. The rou ter then for wards the ac cess re quest to the de fi ned port of the PC in the net work. A fi xed IP-ad dress must
be as sig ned to this PC. When the PC re turns data pa ckets the IP ad dress and port num ber of the PC are re pla ced by
the rou ter with the num ber for the port map ping port and the rou ter IP. For "out si ders" on the In ter net it then ap pe -
ars as though the re is only one con nec ti on to the rou ter.
Note
Plea se note that when you use port map ping the fi re wall for the ports en ab led for this functi on is inef fec ti ve. The
tar get PC in your LAN may then be sus cep ti ble to any po ten ti al at tacks.
Port map ping is prac ti cal when you wish to run a game ser ver on your own, for ex am ple.
·
You can make this ser ver ac ces si ble via the In ter net to ot her users.
·
Or, if you re qui re cer tain peer-to-peer file sha ring soft wa re that pro vi des grea ter downlo ad band width.
·
When the cor re spon ding PC in your LAN is to be ac ces si ble from the In ter net (not pos si ble in the stan dard
con fi gu ra ti on with NAT). In this case, cer tain UDP and TCP ports must be re rou ted to a PC in the LAN.
RAS-Server
Using the Re mo te Ac cess Ser ver (RAS) a field re pre sen ta ti ve, for ex am ple, can call into the lo cal net work from an ex -
ter nal lo ca ti on and then via the lo cal net work ac cess the In ter net. Ac cess from an ex ter nal lo ca ti on is also pos si ble via
an ISDN con nec ti on.
Ex ter nal ac cess is pro vi ded with user-name and pass word pro tec ti on. If the call is made from an ex ter nal lo ca ti on
only, the pho ne num ber can also be mo ni to red as an ad ded pro tec ti on fea tu re. Ac cess can be en ab led for se ve ral
users. A Wind ows en ab le (ac cess to com pu ter, fi les or prin ters) and In ter net en ab le can also be con fi gu red for each
user.
Note
Note that this ac cess por tal is not pro tec ted by a fi re wall!
A PC that di als into the lo cal net work via RAS is au to ma ti cal ly as sig ned an IP ad dress by the in te gra ted DHCP ser ver.
Time-controlled router inhibition
With the aid of the ca len dar, or a ma nu al functi on of the PABX sys tem, you can set the time(s) of day when In ter net
ac cess is pos si ble (per mit ted). The se ti mes are de fi ned via the ca len dar as sig ned to the rou ter in the con fi gu ra ti on.
Here, it is sti pu la ted that In ter net con nec tions can not be set up du ring night-time ope ra ti on. You should the re fo re
set the swit ching ti mes ac cor ding ly. Star ting with Ver si on 4 of sys tem pho nes CS290/CS410, the te le pho nes can be
swit ched using functi on keys on the pho ne; this set ting is then re tai ned un til the next ca len dar-ba sed swit cho ver.
LAN-CAPI
The pa cka ge in clu des a pro gram cal led »CAPI for LANs« for use in your net work. This soft wa re can be in stal led on
any PC in the net work. This gi ves you the pos si bi li ty of run ning your CAPI ap pli ca ti on from a cen tral lo ca ti on via an
in ter fa ce, i. e. the PABX sys tem. The re is no ISDN card re qui red for the PCs. Plea se note that soft wa re used for the
CAPI ap pli ca ti on may re qui re cer tain li cen se agree ments with the soft wa re ma nu fac tu rer. The pro gram »CAPI in
LAN« does not re qui re a li cen se to run.
In tro duc ti on
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