Technical data

10
Configuring MAC Encapsulated Routing: RFC 1483MER / RFC 1490MER with IP Routing 51
Configuring FRF8 with IP Routing 52
Configuring Mixed Network Protocols 53
Configuring a Dual Ethernet Router for IP Routing 54
Verify the Router Configuration 55
Test IP Routing 55
Test Bridging to a Remote Destination 55
Test IPX Routing 56
Sample Configurations 57
Sample Configuration 1 — PPP with IP and IPX 57
Sample Configuration 2 — RFC 1483 with IP and Bridging 65
Sample Configuration 3 — Configuring a Dual Ethernet Router for IP Routing 71
Chapter 4. Configuring Special Features 72
Bridging Filtering and IP Firewall 72
General Information 72
Configure Bridging Filtering 72
Enable/Disable Internet Firewall Filtering 73
IP (RIP) Protocol Controls 74
DHCP (Dynamic Host Configuration Protocol) 75
General Information 75
Manipulating Subnetworks and Explicit Client Leases 76
Setting Option Values 79
BootP 81
Defining Option Types 82
Configuring BootP/DHCP Relays 83
Other Information 84
NAT (Network Address Translation) 85
General NAT Rules 85
Masquerading (one single NAT IP address shared by many PC IP addresses) 85
Classic NAT (one NAT IP address assigned per one PC IP address) 89
Client Configuration 89
Management Security 92
Disable Telnet and SNMP 92
Restore Telnet and SNMP 92
Validation of Telnet and SNMP clients 92
Restrict Remote Access 93
Changing the SNMP Community Name 93
Disable WAN Management 93
Software Options Keys 94
Encryption 95
PPP DES (RFC 1969) Encryption 95
Diffie-Hellman Encryption 96
IP Filtering 98
Filters and Interfaces 98
Configuring Filters with Network Address Translation (NAT) Enabled 99
Filter Actions 99
IP filter commands 100
Special notes 100
L2TP Tunneling - Virtual Dial-Up 101
Introduction 101
L2TP Concepts 101
Configuration 104