SnapGear 1.7.8 manual Network configuration

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Click Configure the server settings on the DHCP Server Configuration screen to:

•Check the Enable DHCP server checkbox.

•Enter the Gateway Address to be distributed to DHCP clients. This is normally the IP address of the LAN interface of the SnapGear appliance.

•Enter the DNS Address to be distributed to DHCP clients. Leave this field blank for automatic DNS server assignment. If your SnapGear appliance is configured for DNS masquerading, you should either leave this field blank, or enter the IP address of the LAN interface of the SnapGear appliance.

•Enter IP address of the WINS server to be distributed to DHCP clients in the WINS Address field.

•Enter the Default Lease Time and Maximum Lease Time in seconds. The lease time is the time that a dynamically assigned IP address is valid.

•Click Configure the IP addresses to be handed out to enter the addresses from where the DHCP server will allocate IP addresses to machines on the local network.

To reserve a particular IP address for a specific machine click Configure the IP addresses to be reserved for particular hosts. For each reserved IP address, you must enter the Hostname and MAC Address of the machine as well as the IP Address that will be allocated to the machine.

To take advantage of the SnapGear appliance’s DHCP server functionality, you should configure the other machines on your local network to get their IP addresses dynamically from the SnapGear appliance. Please refer the documentation for the other machines for instructions on how to configure the local network interface.

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Network configuration

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Contents Rev May 2nd Table of contents Virtual Private Networking Introduction Term Meaning TerminologyLAN TCP/IP Document conventionsStep Chapter Installing and configuring your SnapGear applianceLabel Activity Description Your SnapGear applianceLEDs SnapGear appliance back panels Network interconnections Software features SnapGear appliance featuresDial-in connection features Internet link featuresLAN link features Environmental features Getting started Static IP reset10.0.0.0 10.255.255.255 10/8 prefix New Networks192.168.0.0 192.168.0.255 192.168.0/24 prefix Configuring the SnapGear appliance on your network Page Set up IP addresses Multiple SnapGear appliances were found on the network Your SnapGear appliance was found on the networkYour SnapGear appliance needs an IP address SnapGear Management Console web administration pages Administrative passwordUsing linsetip Initial setup using LinuxPing -b subnet broadcast address Arp -a Using an existing local Dhcp or Bootp serverEdit the /etc/inetd.conf file Configuring a new local Dhcp or Bootp serverSnapGear Quick Setup LAN port quick setup LAN port quick setupISP connection quick setup ISP connection quick setupGetting started Configuring the PCs on your network TCP/IP properties Physically connect modem device Connecting to the InternetConnect to Internet Adsl Select Internet connectionConnect to Internet cable modem Connect to Internet modem Connect to Internet directField Description ISP. The Password and Confirm Password fields mustInternet failover Advanced configuration optionFollowing figure shows the failover configuration screen Failed connection Establishing the connection Configure PCs to use SnapGear appliance Internet gatewayDial-in server configuration Dial-in server configuration Dial-in setup Dial-in setupField Description Dial-in user account creation Dial-in user accountsFollowing figure shows the user maintenance screen Account list Dial-in password errorFor Windows 95 and Windows Remote user configurationServer types Connect to dialogue box WindowsClick Next to continue 11 Connection availability 13 Remote access login screen IP configuration Network configurationNetwork configuration Advanced IP configuration Advanced IP configurationNetwork configuration Dhcp server Dhcp server configurationNetwork configuration Additional routes Advanced networkingTraffic shaping Firewall Incoming accessIncoming access configuration Incoming access administration servicesConfigure external access to services External access to servicesPort forwarding Port forwarding configurationSecurity group classes configuration Outgoing accessFirewall rules Outgoing access settingsIntrusion detection and blocking Intrusion detection and blocking configurationPage Content filtering Content filtering Filtering Level Description Filtering levels and reportingVirtual Private Networking 1VPN tunneling using the Pptp serverPptp client setup Pptp client configuration Pptp server setup Pptp server setup Enable and configure the Pptp VPN serverField Description 4PPTP VPN server accounts screen Configuring user accounts for VPN serverVirtual Private Networking VPN Pptp IP address Configuring the remote VPN clientVirtual Private Networking Windows 95 and Windows VPN client setupYour VPN client is now set up correctly Windows NT Network and dial-up connections This displays the Destination Address window Connecting the remote VPN client 12 IPSec setup IPSec setup13 Add new IPSec connection Virtual Private Networking 14 Automatic keying setup Technique Description Aggressive mode phase 1 settingsIPSec interoperability Time server PasswordSystem Advanced DiagnosticsReset button Flash upgradeTechnical support Technical supportLED Pattern Status Action Appendix a LED status patternsAppendix B System Log Access LoggingPpp Default DenyEth0 Eth1Creating Custom Log Rules Forward Iptables -I Forward -j LOG -i eth+ -o eth+ -p tcp Rate Limiting Administrative Access LoggingBoot Log Messages