Bug 436280
Summary: | Some domains do not resolve on rhel5. For example: uci.cu | ||||||
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Product: | Red Hat Enterprise Linux 5 | Reporter: | Center <techparis> | ||||
Component: | bind | Assignee: | Adam Tkac <atkac> | ||||
Status: | CLOSED NOTABUG | QA Contact: | |||||
Severity: | urgent | Docs Contact: | |||||
Priority: | low | ||||||
Version: | 5.1 | CC: | ovasik | ||||
Target Milestone: | rc | ||||||
Target Release: | --- | ||||||
Hardware: | All | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||
Doc Text: | Story Points: | --- | |||||
Clone Of: | Environment: | ||||||
Last Closed: | 2008-03-10 12:51:00 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: | |||||||
Attachments: |
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Description
Center
2008-03-06 11:02:25 UTC
Are you able to query root servers from affected machine? (Try dig @a.root-servers.net uci.cu for example). Also please try comment out query-source and query-source-v6 options in /etc/named.caching-nameserver.conf and if this doesn't help try set "edns-udp-size 512;" option. System log will also help, would it be possible to attach it, please? Created attachment 297420 [details]
dig @a.root-servers.net uci.cu
Here is the result of the query to the root name servers
Dig root nameservers: Attachment #297420 [details]
Commenting out: "query-source port 53" solved the problem!
edns-udp-size 512; => Did not solve the problem
edns-enable no; => Did not solve the problem
No particuliar error message in system log or named.run.
When running tcpdump, it just looks like no answer packet is coming back after
the queries.
The "query-source" trick did solve the issue, so I suppose this is not a bug in
bind itself, but on the firewall configuration on the other side?
Thanks anyway,
xx
There were bug opened for same issue (https://bugzilla.redhat.com/show_bug.cgi?id=209954) but we never discover where exactly problem is. I expect some misconfigured router or firewall somewhere which drops packets with source port 53. If you find where exactly problem is please write comment here. Closing as notabug |