Bug 208359
Summary: | spurious AAAA DNS query hurts performance and is anti-social | ||
---|---|---|---|
Product: | [Fedora] Fedora | Reporter: | Russell Coker <russell> |
Component: | exim | Assignee: | David Woodhouse <dwmw2> |
Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 8 | CC: | extras-qa, triage |
Target Milestone: | --- | Keywords: | Reopened |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | bzcl34nup | ||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2009-01-09 06:59:09 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Russell Coker
2006-09-28 00:19:13 UTC
See http://www.exim.org/exim-html-4.62/doc/html/spec_html/ch13.html#id2569429 for instructions on disabling all IPv6 support including AAAA lookups. But yes, I agree that if we have no IPv6 support (in fact, I'd go so far as to say if we have no non-link-local IPv6 addresses), Exim should probably do that automatically. Fedora apologizes that these issues have not been resolved yet. We're sorry it's taken so long for your bug to be properly triaged and acted on. We appreciate the time you took to report this issue and want to make sure no important bugs slip through the cracks. If you're currently running a version of Fedora Core between 1 and 6, please note that Fedora no longer maintains these releases. We strongly encourage you to upgrade to a current Fedora release. In order to refocus our efforts as a project we are flagging all of the open bugs for releases which are no longer maintained and closing them. http://fedoraproject.org/wiki/LifeCycle/EOL If this bug is still open against Fedora Core 1 through 6, thirty days from now, it will be closed 'WONTFIX'. If you can reporduce this bug in the latest Fedora version, please change to the respective version. If you are unable to do this, please add a comment to this bug requesting the change. Thanks for your help, and we apologize again that we haven't handled these issues to this point. The process we are following is outlined here: http://fedoraproject.org/wiki/BugZappers/F9CleanUp We will be following the process here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping to ensure this doesn't happen again. And if you'd like to join the bug triage team to help make things better, check out http://fedoraproject.org/wiki/BugZappers This bug is open for a Fedora version that is no longer maintained and will not be fixed by Fedora. Therefore we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen thus bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed. Below is the tcpdump output from using a machine named "test" (which has the name "TEST" in tcpdump output) using a machine named "DNSSERVER" for it's DNS. I send myself an email, it does two "AAAA" lookups for itself (doing two lookups is a bug in itself) and then an "AAAA" lookup for my machine nospam.coker.com.au. At the bottom of this report there is the ifconfig output showing that the machine in question has no IPv6 addresses and therefore no possibility of ever sending mail via IPv6. I can only wonder what it might do if it was to get a response to one of it's AAAA requests. This is from exim-4.68-1.fc8. 10:48:25.789466 IP TEST.filenet-nch > DNSSERVER.domain: 65297+ AAAA? test. (22) 10:48:25.790795 IP DNSSERVER.domain > TEST.filenet-nch: 65297 NXDomain 0/1/0 (97) 10:48:25.822382 IP TEST.filenet-nch > DNSSERVER.domain: 37395+ AAAA? test. (22) 10:48:25.823566 IP DNSSERVER.domain > TEST.filenet-nch: 37395 NXDomain 0/1/0 (97) 10:48:25.827032 IP TEST.filenet-nch > DNSSERVER.domain: 36442+ MX? coker.com.au. (30) 10:48:25.828610 IP DNSSERVER.domain > TEST.filenet-nch: 36442 1/2/3 MX[| domain] 10:48:25.829319 IP TEST.filenet-nch > DNSSERVER.domain: 64716+ AAAA? nospam.sws.net.au. (35) 10:48:25.830459 IP DNSSERVER.domain > TEST.filenet-nch: 64716 0/1/0 (79) 10:48:25.831066 IP TEST.filenet-nch > DNSSERVER.domain: 4689+ A? nospam.sws.net.au. (35) 10:48:25.832517 IP DNSSERVER.domain > TEST.filenet-nch: 4689 1/2/2 A 61.95.69.195 (132) eth0 Link encap:Ethernet HWaddr 00:02:A5:DE:52:B6 inet addr:192.168.0.100 Bcast:192.168.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:386 errors:0 dropped:0 overruns:0 frame:0 TX packets:312 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:37928 (37.0 KiB) TX bytes:39671 (38.7 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:1435 errors:0 dropped:0 overruns:0 frame:0 TX packets:1435 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:3445452 (3.2 MiB) TX bytes:3445452 (3.2 MiB) This message is a reminder that Fedora 8 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 8. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '8'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 8's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 8 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping Fedora 8 changed to end-of-life (EOL) status on 2009-01-07. Fedora 8 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed. |