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Description of problem: Recent installation of nss-mdns as a new dependency of the wine package breaks several features of name resolution including ssh-connections. Version-Release number of selected component (if applicable): wine i586 1.1.29-1.fc11 nss-mdns i586 0.10-7.fc11 How reproducible: Steps to Reproduce: 1. yum update (after Sep 14 or so) or yum install wine 2. ssh othernode Actual results: [root@thisnode ~]# host othernode othernode.company.local has address xxx.xxx.xxx.xxx [root@thisnode ~]# ssh othernode reverse mapping checking getaddrinfo for othernode.company.local [xxx.xxx.xxx.xxx] failed - POSSIBLE BREAK-IN ATTEMPT! Last login: Wed Sep 16 14:36:12 2009 from thisnode [root@othernode ~]# Expected results: [root@thisnode ~]# host othernode othernode.company.local has address xxx.xxx.xxx.xxx [root@thisnode ~]# ssh othernode Last login: Wed Sep 16 14:37:26 2009 from thisnode [root@othernode ~]# Additional info: Removing nss-mdns along with all the wine packages solves this problem.
'host' does not use NSS APIs, and hence is not influenced by nss-mdns. Not sure what this is about, but they way you present it this has nothing to do with nss-mdns...
Well, the 'host' command was there to show that the target address was valid. The real problem is with 'ssh' and other commands. Let me give some further examples that show that there is certainly something weird going on with 'nss-mdns': --- yum --- # rpm -i nss-mdns-0.10-7.fc11.i586.rpm # yum clean all Loaded plugins: refresh-packagekit Cleaning up Everything # yum makecache Loaded plugins: refresh-packagekit http://reposerver.company.local/fedora/releases/11/Everything/i386/os/repodata/r epomd.xml: [Errno 4] IOError: <urlopen error [Errno -2] Name or service not known> Trying other mirror. Error: Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again # cat /etc/yum.repos.d/fedora.repo [fedora] name=Fedora $releasever - $basearch baseurl=http://reposerver.company.local/fedora/releases/$releasever/Everything/$ basearch/os/ enabled=1 ... # rpm -e nss-mdns # yum clean all Loaded plugins: refresh-packagekit Cleaning up Everything # yum makecache Loaded plugins: refresh-packagekit fedora | 3.8 kB 00:00 fedora/group_gz | 370 kB 00:00 ... ---- wget ---- # PROXY=proxyserver.company.local # USER=anonymous%40ftp.funet.fi # HOST=ftp://$USER@$PROXY # FEDORA=pub/mirrors/fedora.redhat.com/pub/fedora/linux # RELEASES=$FEDORA/releases # wget -nH $HOST/$RELEASES/11/Fedora/i386/os/isolinux/splash.jpg --2009-09-17 10:11:52-- ftp://anonymous%40ftp.funet.fi@proxyserver.company.loca l/pub/mirrors/fedora.redhat.com/pub/fedora/linux/releases/11/Fedora/i386/os/isol inux/splash.jpg => `splash.jpg' Resolving proxyserver.company.local... xxx.xxx.xxx.xxx Connecting to proxyserver.company.local|xxx.xxx.xxx.xxx|:21... connected. Logging in as anonymous@ftp.funet.fi ... Logged in! ==> SYST ... done. ==> PWD ... done. ==> TYPE I ... done. ==> CWD /pub/mirrors/fedora.redhat.com/pub/fedora/linux/re leases/11/Fedora/i386/os/isolinux ... done. ==> SIZE splash.jpg ... 775160 ==> PASV ... done. ==> RETR splash.jpg ... done. Length: 775160 (757K) 100%[======================================>] 775,160 4.37M/s in 0.2s 2009-09-17 10:11:53 (4.37 MB/s) - `splash.jpg' saved [775160] # rpm -i nss-mdns-0.10-7.fc11.i586.rpm # wget -nH $HOST/$RELEASES/11/Fedora/i386/os/isolinux/splash.jpg --2009-09-17 10:13:35--ftp://anonymous%40ftp.funet.fi@proxyserver.company.local/pub/mirrors/fedora.redhat.com/pub/fedora/linux/releases/11/Fedora/i386/os/isolinux/splash.jpg => `splash.jpg.1' Resolving proxyserver.company.local... failed: Name or service not known. wget: unable to resolve host address `proxyserver.company.local' # rpm -e nss-mdns
There is a workaround! The nss-mdns package inserts its own method of name resolving into /etc/nsswitch.conf I changed the line hosts: files mdns4_minimal [NOTFOUND=return] dns into hosts: files dns After this everything is back to normal. If I only remove the "[NOTFOUND...]" part, there is a delay (about 15 seconds) before the query is routed to the DNS.
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Fedora 11 changed to end-of-life (EOL) status on 2010-06-25. Fedora 11 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.