Severity

C (critical)

Message text

Interface %s used for both directions

Description

The transparent broadcast mode with source-port is not allowed in the case when the incoming and outgoing interface is the same (e.g. in the case of two networks aliased to the same interface) and source-port forcing is on.

The proxy has implemented a check against re-processing datagrams sent to the target network by itself (the datagrams will appear on the proxy's listening interface again). However, in this case, the proxy cannot recognize and distinguish a new datagram from the client and a datagram sent by itself. All attributes (interface name, source address, source port, target address and target port) of both of them match.

If such a session occurs, proxy logs this message and rejects the session.

The communication must be redesigned.

See also

logging(7)

Authors