Tavve zoneranger User Manual page 82

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The SNMP Proxy service consults the Proxy Map service in the Ranger Gateway to
determine the list of ZoneRangers that manage the target device (ZR-2, and ZR-3). One of
the ZoneRangers (ZR-2) is selected, and the request is forwarded to the selected
ZoneRanger [3].
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The selected ZoneRanger forwards the request to the target device [4].
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The target device replies back to the ZoneRanger [5], which relays the response to the
Ranger Gateway [6]. The SNMP Proxy service relays the response to the GVI driver [7].
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The GVI driver forwards the response to the management application [8].
The primary advantage of GVI and RGVI is that the existence of the SNMP proxy is completely
transparent to the management application. Common routing mechanisms within the underlying
operating system are used to intercept traffic bound for devices in firewall-partitioned networks, so
there is no need to modify or reconfigure the management application in any way. Another
advantage is that the same mechanism can be used for other proxy services, such as ICMP proxy, or
TCP proxy.
SOCKS
SOCKS is a standard protocol for generic TCP and UDP proxy services that can be used to redirect
management traffic from the management application to a SOCKS server integrated within the
Ranger Gateway. In order to use SOCKS, either the management application must include built-in
support for SOCKS, or generic SOCKS "shim" software must be installed on the management
application server. The shim software inserts itself between the management application and the
server's TCP/IP stack, and redirects traffic for specified IP addresses and ports to a SOCKS server,
based on configuration information.
When using the SOCKS mechanism, the management application sends SNMP requests intended
for a managed device to the actual address of the target device, or an address that can be uniquely
mapped to the target device. The built-in SOCKS client or the SOCKS shim redirects these requests
to the SOCKS server integrated within the Ranger Gateway.
ZoneRanger 5.5 User's Guide 82