> From: André Warnier [mailto:a...@ice-sa.com] > Subject: Re: Re : Re : Re : Tomcat 5.5.29 does not accept connections > from outside > > that IPv4 addresses had somehow been mapped to a sub-range > of IPv6 addresses, and that there was always some kind of > "automatic IPv4 to IPv6 translation" going on in the background.
Unfortunately, that's an optional part of the IPv6 RFC, and even when available on a given platform, is usually off by default. When supported, most comm stacks appear to allow the IPv4 mapping on a socket-by-socket basis. > Another impression I'm getting now, is that Tomcat-wise, things are not > very clear in that respect. It really shouldn't be a Tomcat issue, just a JVM and platform one. > - if you are using APR for the HTTP Connector, then it is always IPv4 > (or maybe only up to version X) No, APR has IPv6 capability, and it's on by default, at least in recent versions. > - if you are using the non-APR HTTP Connector, then it is IPv6 by > default, if this is the platform's default ? No, it *should* be both IPv4 and IPv6, and under control of JVM system properties. The fact that we have an observed case or two where only IPv6 was active is very strange. > - the SHUTDOWN connector (default port 8005) seems to be always IPv4, > probably because internally it forces listen address 127.0.0.1 This is correct. > - what about the AJP Connector ? Does that one also depend on whether > you are using APR or not ? Probably suffers from the same constraints that the HTTP connectors do; same underlying code. > - is there a way to force the JVM to use one or the other ? Yes, via system property settings. > I saw the -D parameter indicated by Chuck before, but the OP seemed > to say it had no effect. On what does that depend ? An indication that the OP was likely using APR. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
