Unverified Commit cd77eba4 authored by Michal 'vorner' Vaner's avatar Michal 'vorner' Vaner
Browse files

Merge #1948

This is the guide update to mention the listen_on workaround for multi-homed
parents 21d3d1aa b75e92de
......@@ -1352,6 +1352,24 @@ This may be a temporary setting until then.
and <varname>port</varname> number.
By default, <command>b10-auth</command> listens on port 53
on the IPv6 (::) and IPv4 ( wildcard addresses.
The default configuration is currently not appropriate for a multi-homed host.
In case you have multiple public IP addresses, it is possible the
query UDP packet comes through one interface and the answer goes out
through another. The answer will probably be dropped by the client, as it
has a different source address than the one it sent the query to. The
client would fallback on TCP after several attempts, which works
well in this situation, but is clearly not ideal.
There are plans to solve the problem such that the server handles
it by itself. But until it is actually implemented, it is recommended to
alter the configuration &mdash; remove the wildcard addresses and list all
addresses explicitly. Then the server will answer on the same
interface the request came on, preserving the correct address.
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