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TIBCO Rendezvous® 8.8.0

# Passive Neighbor

A routing daemon can declare that it passively accepts connections from its neighbor, but does not actively initiate the connection itself.

Consider these example situations:

| • | Unidirectional firewall.

Routing daemon `abc.homeNet.myDom.com` is located behind a firewall that allows connection requests in only one direction—outward. Active connection attempts by its neighbor, `mno.lyonNet.myDom.com`, would invariably fail, marking each attempt as a potential security violation at the firewall. When `mno.lyonNet.myDom.com` declares `abc.homeNet.myDom.com` as a neighbor, it can specify passive connect, reflecting its inability to initiate a connection to `abc.homeNet.myDom.com`. To become actual neighbors, `abc.homeNet.myDom.com` must initiate the connection to `mno.lyonNet.myDom.com`.

| • | Modem restriction.

Routing daemon `fgh.oshkoshNet.myDom.com` is located on a host that depends on a modem for network access; the modem settings permit `fgh.oshkoshNet.myDom.com` to dial out, but the modem does not accept incoming calls. Active connection attempts by its neighbor, `klm.chicagoNet.myDom.com`, would invariably fail, while wasting resources. When `klm.chicagoNet.myDom.com` declares `fgh.oshkoshNet.myDom.com` as a neighbor, it can specify passive connect, reflecting its inability to initiate a connection to `fgh.oshkoshNet.myDom.com`. To become actual neighbors, `fgh.oshkoshNet.myDom.com` must initiate the connection to `klm.chicagoNet.myDom.com`.

## Specifying Passive Neighbors

To specify a passive neighbor, you must supply this information:

| • | Remote Router Name

| • | Local Connect Port

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