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own queries. The proxy then takes the response from the external network and forwards it to the LAN client that pla-
ced the original query. In addition, the result from the query is stored for a defined time (configurable) to answer any
subsequent queries of the same type.

Dynamic DNS

Using Dynamic DNS you can also offer your own Internet services (e.g. WEB, FTP or e-mail servers). Usually you
must have a fixed line or a set IP address for this so that you can always be reached at the same URL (For example:
www.Funkwerk-ec.com).
You are assigned a new IP address by the ISP each time you dial in to the Internet however. Using Dynamic DNS you
can link this automatic (dynamic) IP address with a set name. The router will then inform your Dynamic DNS service
provider (e.g. www.dyndns.org) automatically of the new IP address. Internet enquiries for your Web services are
then automatically forwarded to your dynamic IP address via your service provider.

Using Dynamic DNS

·

Configure an Internet address (URL) at a Dynamic DNS service provider. For example, at
“www.dyndns.org” configure the address “www.my-homepage.dyndns.org”.

·

Configure the LAN client of the network in which you wish to offer your Web services with a set IP address.
For example, let’s say we want to configure a Web server with the IP address 192.168.1.200.

·

Activate the Dynamic DNS function in the router and enter the Internet address (URL) for your Dynamic
DNS provider (in the example here www.dyndns.org).
Add the necessary filters in the firewall to allow the PC with the Web services to be reached from an external
location.
- Configure port mapping for Port 80 (HTTP protocol) to IP address 192.168.1.200.
- Configure the filters that permit incoming and outgoing WAN connections at Port 80.

·

The router will automatically inform your Dynamic DNS provider of your current dynamic IP address each
time a connection is set up with the Internet. The information about the IP address is transferred after set-
ting up a new Internet connection, as well as during an ongoing Internet connection.

·

A PC in the Internet enters the address (URL) “www.my-homepage.dyndns.org”. In this way it reaches
your Dynamic DNS service provider. Your service provider reroutes the connection to your current
dynamic IP address.

·

Any incoming connection is handled in accordance with the configured filters. In the example given here
the incoming WAN connection at port 80 is forwarded to the LAN client with the IP address 192.168.1.200.
The available Internet sites of your Web server are displayed on the external PC.

NAT

NAT (Network Adress Translation) protects the connected LAN-clients against attacks from the Internet. Here, the
internal IP addresses are not passed on to the Internet. The router carries out the transfer to the Internet and distribu-
tes the incoming data packets in the internal system. This only requires one external IP address. The internal IP ad-
dresses are protected from attacks from outside. The internal IP addresses can not be targeted by hackers, as these IP
addresses are non-accessible.

Packet Filter Firewall

The integrated filter firewall packet also provides you with enhanced security against attacks from the Internet. A fi-
rewall acts as a logical wall for data packets between the Internet and the LAN which has »holes« for certain packets
(firewall rules, also known as filters), allowing these packets to pass through the wall. The filters are described by ru-
les whose configuration requires expert knowledge about the TCP/IP protocol family. The firewall of your PABX sys-
tem can be easily configured using a Filter Wizard in which you need to indicate (in plain text) whether you wish to
allow defined applications access to the Internet.

Introduction

Router functions

6

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Страница 1: ......

Страница 2: ...atanappropriatewastedisposalfacilityattheendof itsusefulservicelife Youwillfindadditionalinformationonanindividualreturningoftheoldappli ances under www funkwerk ec com 2009 Funkwerk Enterprise Commun...

Страница 3: ...DHCP Recommended configuration Default setting 9 Things to note for this configuration 9 AddressassignmentwithoutDHCP set mixedIPaddresses 11 Things to note for this configuration 12 LAN Client PC Con...

Страница 4: ...Realplayer Filter 28 Mediaplayer Filter 28 Filter update 28 2...

Страница 5: ...erouter AllLANclientsthatarelinkedareintegratedintothelocalnetworkviatheTCP IPproto col Further PCs can be linked to your network via RAS access Here the IP address is always assigned by the telephone...

Страница 6: ...in your list fall back When anInternetconnectionis terminated the first ISP in the list is usedwhen the next connectionattempt is initi ally carried out Note For more information about configuring ISP...

Страница 7: ...nwhichtherouterisintegra ted The router DHCP must be de activated in the configuration for this Default setting of the PABX Default IP addresses for the local area network In its basic setting you can...

Страница 8: ...within thesameIPnetwork APCwiththeIPaddress192 168 2 1islocatedinadifferentnetwork APCfromthePABXnet would not be able to locate this other PC if it is not within its own network In addition the same...

Страница 9: ...ox or cell phone without a B channel of the telephone system being allocated Normal call distribution OneBchannelisde activatedandthecallsignaledatthesubscriberenteredunder Callallocation forthe Exter...

Страница 10: ...tomaticallyinformyourDynamicDNS provider ofyourcurrentdynamicIPaddresseach timeaconnectionissetupwith theInternet TheinformationabouttheIPaddressistransferredafterset tingupanewInternetconnection aswe...

Страница 11: ...xternal access is provided with user name and password protection If the call is made from an external location only the phone number can also be monitored as an added protection feature Access can be...

Страница 12: ...inthePABXsystem YoucanthenmanuallysetupaconnectiontotheInternetviatheControlCenterandthe results for this connection are then displayed after a few seconds No actual Internet connection is established...

Страница 13: ...ettings for address assignment via DHCP If other means of Internet connection for example modem or an ISDN card have already been configured on the LAN client PC observe the information given in the s...

Страница 14: ...ControlPanelfromtheWindowsStartMenu UnderWindows2000 openthefolder NetworkandDial up Connections UnderWindowsXPopenthefolder Networkconnections Selectthe LANConnection forthePABXbypressingtherightmous...

Страница 15: ...omatically via DHCP Intheexamplegivenhere theIPaddressesfortheclients PCs canliewithinarangefromIP192 168 1 50to192 168 1 69 TheIPaddressesareassignedintheorderthattheclients PCs requestthem forexampl...

Страница 16: ...You must make the following minimum settings manually IPaddressfortheLANclient PC Netmask Subnetmask whichisalsoenteredinthePABXrouter IPaddressofthePABXsystemasthegateway interfacetoothernetworks fo...

Страница 17: ...h setaddressassignmentonthefollowing pages Confirm yoursettingsbyclickingOK Example Windows 2000 and Windows XP OpentheControlPanelfromtheWindowsStartMenu UnderWindows2000 openthefolder NetworkandDial...

Страница 18: ...8 1 91 Gateway 192 168 1 250 DNSserver 192 168 1 250 Subnetmask 255 255 255 0 PC2 FixedIP 192 168 1 93 Gateway 192 168 1 250 DNSserver 192 168 1 250 Subnetmask 255 255 255 0 PC3 IPviaDHCP 192 168 1 50...

Страница 19: ...DHCP server is off NumberofDHCPaddresses DHCP server is off PC1 FixedIP 192 168 1 81 Gateway 192 168 1 250 DNSserver 192 168 1 250 Subnetmask 255 255 255 0 PC3 FixedIP 192 168 1 83 Gateway 192 168 1 2...

Страница 20: ...ave beenconfiguredcorrectlyinyourPC seePagein section SettingsimInternetExplorer InternetoptionenofWindows Ifyouhavemadethesettingsasdescribedabove thetelephonesystemwill establishaconnectiontotheIn t...

Страница 21: ...ngefrom192 168 1 50 to 192 168 69 Whenthesevaluesaredisplayed thenetworkadapterandtheWindowsnetworksettingshave beenconfiguredcorrectly Should theprogram Winipcfg showothervalues clickthebuttons Enabl...

Страница 22: ...lueforthephysicaladdressisdifferent foreachnetworkadapter Thevaluesfortheleasedependon whenthePCisswitchedon If other data are shown this may be due to the following reasons Changeshavealreadybeenmade...

Страница 23: ...rent foreachnetworkadapter Thevaluesfortheleasedependon whenthePCisswitchedon If other data continues to be shown this may be due to the following reasons Changeshavealreadybeenmadetotheinitial settin...

Страница 24: ...ystem s Configurator Internet Explorer settings Windows Internet options ThefollowingdescriptionillustratesthesettingsforInternetconnectionsforthevariousoperatingsystems Proceed as described below for...

Страница 25: ...Configuring Internet access on a PC Checking the TCP IP Configuration 21...

Страница 26: ...s of data security and are an ideal compliment to one another but can not replace one another To configure self defined filters click the button New or change an existing entry in the filter list by d...

Страница 27: ...s located in the same IP subnetwork as the WAN port This parameter is currently not used and will not be significant for future software updates You can configure the following parameters Nameofthefil...

Страница 28: ...the WAN address of the PABX system Configuration example for a portmapping entry into the firewall for the ssh protocol Thesshprotocol secureshell isusedamongother thingsfor webserveradministration o...

Страница 29: ...ileges in exchange networks using port mapping by your telephone system router enter the name of the appli cation and the terms port and firewall in an Internet search engine configuration instruction...

Страница 30: ...that a large region of the firewall be enabled Outgoingconnectionsatports20and21andincomingonesfromtheseportstonon privilegedportsareenabled Passive FTP Filter This filter permits file transfer via FT...

Страница 31: ...incoming packets from that port to non privileged ports TELNET Filter ThisfilterpermitstheuseofthetelnetserviceprogrammeatcomputersintheInternetbyenablingpacketstoport23 for outgoing connections and i...

Страница 32: ...r Wizard operates using a descriptive file that you can easily update without necessarily having to update the software in your PABX your router or PC Check at regular intervals whether new descriptio...

Страница 33: ...beforethisbuttonisactivated Thebutton Help islocatedintheconfigurationbranch Network Filters Thetextthatisdisplayedwhenyouclickthisbuttonistakendirectlyfromthefile Filter_Info txt allowing the Help f...

Страница 34: ...S 6 Dynamic ISDN 4 Dynamic ISDN for outgoing calls 5 F Fallback 4 Filter Wizard 25 26 27 Firewall 6 I Internet Explorer settings 20 Internet options of Windows 20 Internet connections 1 IP address all...

Страница 35: ...31...

Страница 36: ...cations GmbH S dwestpark 94 D 90449 N rnberg For information on support and service offerings please visit our Website at www Funkwerk ec com where you will find a Service Support area Subject to modi...

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