Multitech RF760 User's Guide Page 103
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Chapter 6 – RouteFinder Software
Multi-Tech Systems, Inc. RouteFinderVPN RF760/660/600VPN User Guide (PN S000323D) 103
Packet Filters > ICMP
Packet Filters > ICMP
ICMP (Internet Control Message Protocol) is necessary to test network connections and to test functionality of your firewall. It
is also used for diagnostic purposes.
ICMP-forwarding and ICMP-on-firewall always apply to all IP addresses (“Any”). When these are enabled, all IPs can ping
the firewall (ICMP-on-firewall) or the network behind it (ICMP-forwarding). Separate IP addresses can then no longer be
ruled out with packet filter rules. If the ICMP settings are disabled, separate IPs and networks can be allowed to send ICMP
packets through the firewall by using appropriate packet filter rules.
ICMP Forwarding
Check the ICMP Forward checkbox to enable the forwarding of ICMP packets through the RouteFinder into the
local network and all connected DMZs. In this way you select whether an ICMP packet should be dropped or
passed through to the local network and all connected DMZs.
If ICMP forward is enabled, ICMP packets go through all connected networks. Another use of ICMP
forwarding is to allow ICMP packets to be forwarded to individual networks (set in Packet Filter > Rules). For
this, ICMP forward in Packet Filter > ICMP must be disabled.
The status is activated by clicking the Save button.
ICMP on Firewall
Check the ICMP on LAN, ICMP on WAN, and/or ICMP on DMS firewall checkbox to enable the direct sending
and receiving of ICMP packets by the RouteFinder. Then click the Save button.
Note: To be able to use the tools Trace Route and Ping, the function ICMP on firewall must be enabled. After
a successful startup of the RouteFinder, it is recommended that you disable this rule so that the RouteFinder
cannot be pinged anymore.
- RF760/660/600VPN 1
- Internet Security Appliance 1
- User Guide 1
- Contents 3
- Features, and Overview 7
- Feature Highlights 8
- Ship Kit Contents 9
- License Keys 10
- Safety Warnings 11
- RouteFinder Front Panels 12
- RF600VPN 13
- RouteFinder Back Panels 14
- Specifications 15
- Power & Physical 16
- Description 16
- RF760VPN RF660VPN RF600VPN 16
- The Firewall 17
- Protection Mechanisms 18
- Typical Applications 20
- Chapter 2 – Installation 21
- Planning the Network 22
- Installation Overview 23
- RouteFinder VPN 24
- Sub-Menu 27
- Menus and Sub-Menus 27
- Chapter 3 – Configuration 28
- Second Configuration Step 29
- The Wizard Setup Screen 30
- Set Packet Filters 33
- Set VPN IPSec Protocol 34
- Configuring Site B 35
- Using DNAT and Aliasing 37
- Tunneling 38
- Important Settings 39
- Menu Bar 42
- Administration 43
- System Logging 44
- System Time 44
- SNMP Agent – Community Name 44
- Administration > SSH 45
- SNTP Client 46
- SNTP Server Address 46
- Click Save 49
- Intrusion Detection 51
- Network Intrusion Detection 51
- Administration > Tools 52
- Trace Route 53
- TCP Connect 53
- Prerequisite 55
- RADIUS Prerequisite 56
- SAM Prerequisite 57
- Administration > Restart 58
- Administration > Shutdown 58
- Networks & Services 59
- Add Services 61
- Notes About Protocols 62
- About the Screen 63
- Add Network Group 63
- Add Service Group 64
- Proxy > HTTP Proxy 66
- Add Custom URL List 69
- Proxy > SMTP Proxy 71
- SMTP SPAM Filtering 74
- Proxy > POP3 Proxy 77
- POP3 SPAM Protection 78
- POP3 SPAM Filtering 78
- Proxy > SOCKS Proxy 80
- Proxy > DNS Proxy 82
- Network Setup 83
- Network Setup > Interface 84
- Network Cards 85
- IP Aliases 85
- Network Setup > PPP 86
- Network Setup > PPPoE 87
- Dynamic DNS Settings 89
- Network Setup > Routes 90
- Masquerading 91
- Network Setup > SNAT 92
- Network Setup > DNAT 93
- DHCP Server 94
- Tracking 95
- System Update Server 96
- Virus Update Server 96
- Update Services 97
- System Update - Livelog 97
- Virus Update - Livelog 97
- Tracking > Backup 98
- CVS Settings 100
- Examples 100
- Packet Filters 101
- System Defined Rules 102
- Packet Filters > ICMP 103
- Packet Filters > Advanced 104
- Enable/Disable Logging 105
- VPN > IPSec 106
- Add an IKE Connection 107
- Add a Manual Connection 109
- VPN > x.509 Certificates 111
- VPN > IPSec Bridging 111
- VPN > PPTP 112
- PPTP Settings 113
- User Authentication 113
- Wizard Setup 114
- Packet Filter Rule 115
- Modem Settings 115
- Password Settings 115
- Save or Cancel 115
- Statistics & Logs 116
- Uptime 117
- Statistics and Logs 118
- Networks 118
- Network Connections 119
- Interfaces 120
- SMTP Proxy 121
- Self Monitor 123
- Packet Filter 125
- Port Scans 126
- HTTP Access 127
- Methods 130
- Authentication Setup 131
- Chapter 8 – Frequently Asked 133
- Questions (FAQs) 133
- Chapter 9 – Troubleshooting 139
- 1. Abstract 142
- II. Inbound Access Log 143
- III. Outbound Access Log 145
- VII. Admin Port Access Log 147
- VIII. Startup History Log 147
- IX. User Log 147
- X. Fragmented Dropped Log 147
- XI. ICMP Information 148
- What Is a Rescue Kernel? 149
- Before You Start 149
- ISO Image Directions 149
- External Server 150
- External FTP Server 151
- Software Add-ons, Overnight 153
- Replacement 153
- Top Cover Removal 154
- RF660VPN Processor Upgrade 154
- Software Add-ons 156
- CD-ROM Drive Adapter Pin Out 157
- Housekeeping 158
- Monitoring 158
- Updating 159
- Technical Support Contacts 161
- GNU GENERAL PUBLIC LICENSE 168
- ANY REMEDY HEREUNDER 172
- Support 173
- Limited Warranty 174
- Limitation of Liability 174
- Glossary 176
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