emerge --sync error with gatech mirror

[skiwarz]

I have my repos.conf set up to use rsync with rsync://rsync.us.gentoo.org/gentoo-portage. Half the time, the mirror it chooses is rsync.gtlib.gatech.edu. That particular mirror fails 100% of the tine with:

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---------------------------------------------------------------------------

GEORGIA TECH SOFTWARE LIBRARY

Unauthorized use is prohibited.  Your access is being logged.

GTlib is hosted by the Partnership for an Advanced Computing Environment
(PACE) at the Georgia Institute of Technology in Atlanta, Georgia, USA.

     http://www.pace.gatech.edu

GTLib is operated as a "best effort" service.  We _strongly_ recommend
against depending on the availability of this service in a critical context.

If you run a publicly accessible mirror, and are interested in
mirroring from us, please contact gtlib@gtlib.gatech.edu.

If you run a mirror that is not accessible to the public, please mirror
from the modules listed at rsync://rsync.gtlib.gatech.edu.

----------------------------------------------------------------------------

@ERROR: access denied to gentoo-portage from UNKNOWN ($MY_IP_ADDRESS)
rsync error: error starting client-server protocol (code 5) at main.c(1863) [Receiver=3.2.7]

I know I can select a specific mirror if I want, but I prefer to use the whole "pool." Can I blacklist a specific mirror instead?
Or, does anyone know what might be causing this error? I sent an email to the address in this message but received no response.

[miket]

You had me worried for a bit: I use Geogia Tech's mirror as my primary mirror. Just now I tried an emerge --sync with it just now and it worked fine.

Your report made me suspect that Gentoo's mirror configuration (at https://www.gentoo.org/downloads/mirrors/) for that mirror changed, but I see that it is still what I have configured in my make.conf: http://www.gtlib.gatech.edu/pub/gentoo. So much for that theory.

Here is what I suspect is going on: the Georgia Tech site is listed as IPv4 only. Could it be the case that your ISP is IPv6 only or your own host is configured for IPv6 only?

[skiwarz]

You had me worried for a bit: I use Geogia Tech's mirror as my primary mirror. Just now I tried an emerge --sync with it just now and it worked fine.

Your report made me suspect that Gentoo's mirror configuration (at https://www.gentoo.org/downloads/mirrors/) for that mirror changed, but I see that it is still what I have configured in my make.conf: http://www.gtlib.gatech.edu/pub/gentoo. So much for that theory.

Here is what I suspect is going on: the Georgia Tech site is listed as IPv4 only. Could it be the case that your ISP is IPv6 only or your own host is configured for IPv6 only?

Two different things. I think you're referring to your GENTOO_MIRRORS variable, which is for downloading distfiles, disc images, etc. I'm referring to the repo mirrors (https://www.gentoo.org/support/rsync-mirrors/)
Anyways, when I plug in the rsync://rsync3.us.gentoo.org/gentoo-portage uri into my repos.conf, I still get the same failure.
See https://bugs.gentoo.org/946124 for more info on this error.

[miket]

Anyways, when I plug in the rsync://rsync3.us.gentoo.org/gentoo-portage uri into my repos.conf, I still get the same failure.
See https://bugs.gentoo.org/946124 for more info on this error.

Yes, I can see where you would get the wrong address--but I also see in your bug report that it appears that you complained to the wrong people.

Indeed, the listing of the page of hosts for the GENTOO_MIRRORS variable shows both the http: and rsync: protocols for the host name that Georgia Tech provided for the purpose, www.gtlib.gatech.edu. This resolves to the same IP address that you cite from the rsync-host page on the Gentoo site: rsync3.us.gentoo.org. Here are the DNS-lookup reports for the two:

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$ host www.gtlib.gatech.edu
www.gtlib.gatech.edu has address 128.61.111.7
www.gtlib.gatech.edu has address 128.61.111.11
www.gtlib.gatech.edu has address 128.61.111.9

$ host rsync3.us.gentoo.org
rsync3.us.gentoo.org has address 128.61.111.7
rsync3.us.gentoo.org has address 128.61.111.9
rsync3.us.gentoo.org has IPv6 address 2610:148:1f00:6f00:250:56ff:fe92:434b
rsync3.us.gentoo.org has IPv6 address 2610:148:1f00:6f00:216:36ff:fe8e:1308

So OK, both IPv4 addresses that us.gentoo.org reports are common to www.gtlib.gatech.edu.

Look again at the domain name you've been using: rsync3.us.gentoo.org. This is not a Georgia Tech problem; it's a Gentoo problem. Gentoo's zone file needs to stop reporting those two IPv6 addresses (which actually do belong to Georgia Tech, but for a different purpose) and report just the three IPv4 addresses that Georgia Tech reports for www.gtlib.gatech.edu.

In the meantime before they get that fixed, I'd suggest using www.gtlib.gatech.edu for your rsyncs.

[skiwarz]

Yes, I can see where you would get the wrong address--but I also see in your bug report that it appears that you complained to the wrong people.

To clarify, that was not my bug report. I only made the last comment. I linked it simply to show for anyone reading that it's a more widespread issue.

Indeed, the listing of the page of hosts for the GENTOO_MIRRORS variable shows both the http: and rsync: protocols for the host name that Georgia Tech provided for the purpose, www.gtlib.gatech.edu.

I hadn't noticed the rsync entries on that page... thanks.

So OK, both IPv4 addresses that us.gentoo.org reports are common to www.gtlib.gatech.edu.

Look again at the domain name you've been using: rsync3.us.gentoo.org. This is not a Georgia Tech problem; it's a Gentoo problem. Gentoo's zone file needs to stop reporting those two IPv6 addresses (which actually do belong to Georgia Tech, but for a different purpose) and report just the three IPv4 addresses that Georgia Tech reports for www.gtlib.gatech.edu.

In the meantime before they get that fixed, I'd suggest using www.gtlib.gatech.edu for your rsyncs.

I'm fairly certain this is not an IP or DNS problem. I'm connecting to the gatech server just fine. It's the server that's rejecting me. See my initial post.

[miket]

I'm fairly certain this is not an IP or DNS problem. I'm connecting to the gatech server just fine. It's the server that's rejecting me. See my initial post.

It seems that both are true. I tested rsync with both the rsync3.us.gentoo.org and www.gtlib.gatech.edu domains and with various rsync paths (with the thought that /gentoo-portage might not be the path to use on the Georgia Tech servers) and consistently had either the authorization error or an invalid-rsync-path error. I also found that the IPv6 hosts didn't respond at all. That means that, yes, there is a configuration issue on Georgia Tech's rsync servers as well as a couple of spurious IPv6 DNS entries on the Gentoo zone file.