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A: By default, you cannot use SNMP from WAN side except you configure a Virtual Server with UDP Port 161 to the Router's LAN IP.

Please note:

  1. After upgrading to 4.20e or later, the SNMP communities have been moved to another database.
    Users have to manually add back the communities via CLI commands below:
    - 'snmp add access read public'
    - 'snmp add access write password'
  2. When added successfully, the new settings can be saved into flash via 'Save Config to FLASH', and then activated in each rebooting hereafter.
  3. The maximum access communities is up to 5.
  4. You can also add trap receiver by using CLI commands, 'snmp add trap'

SNMP version : SNMPv2c

(SNMPv2c is the combination of the enhanced protocol features of SNMPv2 without the SNMPv2 security. The "c" comes from the fact that SNMPv2c uses the SNMPv1 community string paradigm for "security", but is widely accepted as the SNMPv2 standard.) Trap supported: Cold Start, Authentification Failure. The following MIBs are supported:

RFC 1213 (MIB-II) System Group Interfaces Group SNMP Group IP Group
ICMP Group TCP Group UDP Group EGP (not applicable)
Transmission Address Translation Group .
RFC 1650 (Ether Link-MIB) dot3Stats
RFC 1493 (Bridge MIB) dot1dBase Group dot1dTp Group dot1dStp Group
(If configured as spanning tree)
RFC 1471 (PPP/LCP MIB) pppLink Group pppLqr Group
RFC 1472 (PPP/Security MIB) PPP Security Group
RFC 1473 (PPP/IP MIB) PPP IP Group
RFC 1474 (PPP/Bridge MIB) PPP Bridge Group
RFC 1573(IfMIB) IfMIBObjects Group
RFC 1695(atmMIB) AtmMIBObjects Group
RFC 1907 (SNMPv2) Only snmpSetSerialNo OID

This is a special service from ISP that ISP will assign a subnet (group IPs) negotiated in the IPCP, to subscriber through PPPoA or PPPoE connection. Then subscriber can use these public IPs to surf Internet directly.Pl ease follow the following steps to configure router to achieve this feature.

  1. Access router and click "Configuration" => "WAN" => "ISP" => "Edit" => "Advanced Options" => "PPP"
  2. Enable both functions "Give Subnet Mask to DHCP Server" and "Discover Subnet Mask"
  3. Disable the NAT in PPPoA/PPPoE WEB page
  4. Save the configuration to flash and restart to enable this setting.
A: If you are use DDNS with server "", please add packet filtering rule to allow outbound traffic with port 8245/TCP. For other servers, you have to add packet-filtering rule to allow outbound traffic with port 80/TCP.
A: When user enable the firewall, some of ports are needed to configure in the packet filter. The communication ports of MSN Messenger are 443/TCP, 1863/TCP and 7001/UDP. In this case, the outbound and inbound of the above ports should set "allowed". Then all MSN Messenger features would be working.
A: When user enables the firewall, some of ports are needed to configure in the packet filter. The communication port of ICQ and AIM is TCP 5190. In this case, the outbound and inbound of the port 5190 should set "allowed". Then ICQ and AIM would be working.
A: PPTP uses two protocols: TCP/1723 for session control and IP protocol 47 (GRE) for data phase. If firewall enabled, please add packet-filtering rule for both TCP/1723 and protocol/47.
A: Please add port (411) into the port filter and set ALLOW for inbound and outbound traffic. This port is used for DC++ application to communicate with server. Without this port ALLOWED, it is not possible to exchange information with server.