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Bryan Pendleton edited comment on DERBY-7107 at 3/16/21, 2:14 PM: ------------------------------------------------------------------ INADDR_ANY means the socket will be bound to all local interfaces. See: [https://man7.org/linux/man-pages/man7/ip.7.html] Why do you think this behavior is a bug? It seems to me that if you have security software which is blocking this, you should simply specify an explicit interface on which to listen. was (Author: bpendleton): INADDR_ANY means the socket will be bound to all local interfaces. See: [https://man7.org/linux/man-pages/man7/ip.7.html] Why do you think this behavior is a bug? > NetworkServerControl fails to connect to server started on INADDR_ANY > --------------------------------------------------------------------- > > Key: DERBY-7107 > URL: https://issues.apache.org/jira/browse/DERBY-7107 > Project: Derby > Issue Type: Bug > Components: Network Server > Affects Versions: 10.14.2.0, 10.15.2.0 > Reporter: Holger Rehn > Priority: Critical > > If starting a NetworkServerControl on INADDR_ANY (0.0.0.0) it also uses this > address when connecting to the running server instance (e.g. in method > ping(), ...). > Strictly speaking, INADDR_ANY isn't a valid target address. However, under > normal circumstances, this works anyway. But if you have any "security" > software in place that blocks such connections (Firewall or VPN, e.g. Cisco > AnyConnect), you end up with an IOException: > {code}Could not connect to Derby Network Server on host 0.0.0.0, port 1527: > Permission denied: connect.{code} > One simple fix would be to explicitly check the host address 'hostAddress' in > NetworkServerControlImpl.setUpSocket() and if this is INADDR_ANY, use > 'localhost' instead. -- This message was sent by Atlassian Jira (v8.3.4#803005)