Siemens Unix V4.0 - Manual (Page 206)

Implementing WINS Name Resolution Services
Product Manual U7613-J-Z815-6-76
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10
10.1.2.2 WINS Proxy
A WINS proxy is a WINS-enabled computer that helps resolve name queries for non-WINS
enabled computers in routed TCP/IP intranets. By default, non-WINS enabled computers
are configured as b-node which uses IP broadcasts for name queries. The WINS proxy
computer listens on the local subnet for IP broadcast name queries.
When a non-WINS enabled computer sends an IP name query broadcast, the WINS proxy
accepts the broadcast and checks its cache for the appropriate NetBIOS computer name-
to-IP-address mapping. If the WINS proxy has the correct mapping in its cache, the WINS
proxy sends this information to the non-WINS computer. If the name-to-IP-address
mapping is not in cache, the WINS proxy queries a WINS server for the name-to-IP-address
mapping.
If a WINS server is not available on the local subnet, the WINS proxy can query a WINS
server across a router. The WINS proxy caches (stores in memory) computer name-to-IP-
address mappings it receives from the WINS server. These mappings are used to respond
to subsequent IP broadcast name queries from b-node computers on the local subnet.
The name-to-IP-address mappings that the WINS proxy receives from the WINS server are
stored in the WINS proxy cache for a limited time. (By installation default this value is 6
minutes. The minimum value is 1 minute.)
When the WINS proxy receives a response from the WINS server, it stores the mapping in
its cache and responds to any subsequent name query broadcasts with the mapping
received from the WINS server.
Because the WINS server does not respond to broadcasts, a computer configured as a
WINS proxy should be installed on subnets which contain computers that use broadcasts
for name resolution.
To configure a Windows NT, Version 4.0, computer as a WINS proxy, you must
manually edit that computer’s registry. The
EnableProxy keyword must be set to 1
(REG_DWORD). This keyword is located in the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netbt\Parameters
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