The noip2 program from the net-dns/noip-updater package is failing with the error message "Can't gethostbyname for dynupdate.no-ip.com", although name resolution is working in my system. Reproducible: Always Steps to Reproduce: 1. 2. 3. # emerge --info Portage 2.0.50-r1 (default-x86-1.4, gcc-3.3.2, glibc-2.3.3_pre20040207-r0, 2.6.3-rc2-gentoo) ================================================================= System uname: 2.6.3-rc2-gentoo i686 AMD Athlon(tm) XP 2000+ Gentoo Base System version 1.4.3.13 Autoconf: sys-devel/autoconf-2.59 Automake: sys-devel/automake-1.8.2 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CFLAGS="-O2 -march=athlon-xp -funroll-loops -fprefetch-loop-arrays -pipe" CHOST="i686-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3/share/config /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" CXXFLAGS="-O2 -march=athlon-xp -funroll-loops -fprefetch-loop-arrays -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs buildpkg ccache sandbox" GENTOO_MIRRORS="http://www.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.namerica.gentoo.org/gentoo-portage" USE="3dnow X aalib acl acpi alsa apm arts artswrappersuid avi berkdb bonobo cdr crypt cups dvd encode esd fbcon foomaticdb gdbm gif gnome gpm gracenote gtk gtk2 gtkhtml guile imap imlib imlib2 java javascript jpeg kde libg++ libwww linguas_de linguas_en linguas_fr linguas_pt lirc mad mbox mikmod mmx motif mozilla mozsvg mpeg mysql ncurses nls oggvorbis opengl oss pam pdflib perl png python qt quicktime readline rplay samba sdl slang spell sse ssl stroke svga tcltk tcpd tetex tiff truetype usb wmf x86 xface xml xml2 xmms xv zlib"
Created attachment 25626 [details] Simple test program for the gethostbyname() function To test the gethostbyname() function, I have written this small C program. Running it in my systems gives me: $ ./gh name = dynupdate.no-ip.com addrtype = 2 length = 4 63.215.241.204. So where is the problem with noip2 from net-dns/noip-updater ?
*** Bug 41597 has been marked as a duplicate of this bug. ***
try install net-misc/host
net-misc/host-991529 is already installed: # qpkg -i -I net-misc/host net-misc/host-991529 * the standalone host tool, supports LOC reporting (RFC1876) [ http://www.dtek.chalmers.se/~d3august/xt/ ] Name resolution is also working: # hostx dynupdate.no-ip.com dynupdate.no-ip.com A 63.215.241.204 But noip2 insists in not work, with the error message in /var/log/messages: Feb 18 14:21:37 gentoo noip2[4767]: Can't gethostbyname for dynupdate.no-ip.com
Your test program is bugus. Check the manpage (last sentence): -- RETURN VALUE The gethostbyname() and gethostbyaddr() functions return the hostent structure or a NULL pointer if an error occurs. On error, the h_errno variable holds an error number. When non-NULL, the return value may point at static data, see the Notes below. -- Meaning, you should _only_ test h_errno.
I do not see why the test program is incorrect. It tests the value returned by gethostbyname(). As mentioned in the man page: "The gethostbyname() [...] functions return the hostent structure or a NULL pointer if an error occurs." Therefore if an error occurs, the returned value is NULL. The test program has the lines if (! h) { herror("ERROR FOUND: "); return 1; } which just test that. I do not agree with the idea that "[...] you should _only_ test h_errno." This is neither explicit nor implicit in the man page. It is just the oposite: h_errno is meaningfull only in error conditions, and an error condition is signeld by a NULL return value. But independently of this test program, the fact is that noip2 is not working and it logs a message indicating that the problem is that gethostbyname() can not resolve dynupdate.no-ip.com, although DNS is working in this system, as shown by the command $ hostx dynupdate.no-ip.com dynupdate.no-ip.com A 63.215.241.204
I just installed noip-updater, created a noip account and ran it. It seems to work and it created a noip subdomain for me (jhhudso.no-ip.com)
noip-updater continus to not work for me. For some reasons I had to reinstall my Gentoo Linux system and I was hoping that with the new install it would work correctly again. But it does not. I really do not understand why it is not working for me. The message left in /var/log/messages is the same: Mar 26 16:34:04 gentoo noip2[3043]: Can't gethostbyname for dynupdate.no-ip.com althoug other programs that resolve DNS names is working flawlesslly. If I am not wrong, the gethostbyname() is implemented in glibc. Could it be something related to the glibc version I have installed (sys-libs/glibc-2.3.3_pre20040207)? Maybe downgrading glibc then would solve the problem. Any more comments?
Same behaviour with sys-libs/glibc-2.3.2-r9.
I am having a problem with cvs that seems to be related to this problem with noip-updater. If called directly in the command line, cvs succeeds. But when called by emerge to install a package whose source is to be retrieved using cvs, it fails with a unknown host message. See bug #46377.
At the outset I will say that I am not sure exactly what I am doing and I may be doing a bad thing but I was getting the 'gethostbyname()' error. This may help others find the problem. I was looking through the code and found the following piece of code at line 528 /* drop root privileges after reading config */ if (geteuid() == 0) { if ((nobody = getpwnam("nobody")) != NULL) { // if "nobody" exists setgid(nobody->pw_gid); setegid(nobody->pw_gid); setuid(nobody->pw_uid); seteuid(nobody->pw_uid); } } I commented it out completely then recompiled and ran it. The error disappeared and it was updating successfuly. This seems a little insecure for me but I do not have the skills to work out why this happens.
What are your permissions on / /etc /etc/resolv.conf /etc/nsswitch.conf This seems to be a bug in the way your systems resolver is setup. If you're anything but root noip-updater seems unable to looks up dns resolutions. What do the two above files look like?
Is this what you are after? -rw-r--r-- 1 root root 37 Jul 5 17:29 /etc/resolv.conf -rw-r--r-- 1 root root 497 Jul 5 19:15 /etc/nsswitch.conf
What is the contents of your nsswitch.conf and resolv.conf file?
/etc/resolv.conf domain home.loc nameserver 172.1.1.2 /etc/nsswitch.conf # /etc/nsswitch.conf: # $Header: /var/cvsroot/gentoo-src/rc-scripts/etc/nsswitch.conf,v 1.4 2002/11/18 19:39:22 azarah Exp $ passwd: compat shadow: compat group: compat # passwd: db files nis # shadow: db files nis # group: db files nis hosts: files dns networks: files dns services: db files protocols: db files rpc: db files ethers: db files netmasks: files netgroup: files bootparams: files automount: files aliases: files
Ok - I was getting this problem too using my new address of new.no-ip.com. Fixed it by fettling my system's resolver config, including: * changed /etc/dnsdomainname (and nisdomainname) from old.no-ip.com to no-ip.com * changed domain line at top of /etc/resolv.conf from old.no-ip.com to no-ip.com * amended entry corresponding to value of /etc/hostname in /etc/hosts - "hostname -i" now returns the correct local address Serve me right for being lazy when transferring networks... Hope this helps someone... Jesu
I'm having this problem too ;) I can't figure out how to make noip-updater working again...
I have added the line 63.215.241.204 dynupdate.no-ip.com to /etc/hosts.
what if anything needs to be done for this to be closed? Please summarise for slow old me.
I do not know why the noip2 program is failing to resolve dynupdate.no-ip.com. But it is not working yet. So the bug should not be closed right now, without a solution, although I do not know the solution. As a workaround, I have added the following line to /etc/hosts: 63.215.241.204 dynupdate.no-ip.com Some information from my system: # ls -d -l / /etc /etc/resolv.conf /etc/nsswitch.conf drwxr-xr-x 26 root root 4096 Nov 13 21:15 / drwxr-xr-x 82 root root 8192 Dec 3 08:37 /etc -rw-r--r-- 1 root root 498 Nov 8 23:32 /etc/nsswitch.conf -rw-r----- 1 root users 79 Dec 3 08:18 /etc/resolv.conf # cat /etc/dnsdomainname malaquias.no-ip.org # cat /etc/hostname gentoo # cat /etc/resolv.conf nameserver 200.225.197.34 nameserver 200.225.197.37 domain malaquias.no-ip.org # cat /etc/nsswitch.conf # /etc/nsswitch.conf: # $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/nsswitch.conf,v 1.4 2002/11/18 19:39:22 azarah Exp $ passwd: compat shadow: compat group: compat # passwd: db files nis # shadow: db files nis # group: db files nis hosts: files dns networks: files dns services: db files protocols: db files rpc: db files ethers: db files netmasks: files netgroup: files bootparams: files automount: files aliases: files
Does Tom's solution in comment 16 work?
The solution from commment #16 does not solve the problem for me: # rc-update show | grep "name " domainname | default hostname | boot # grep '^[^#]' /etc/conf.d/domainname OVERRIDE=1 DNSDOMAIN="no-ip.org" # grep '^[^#]' /etc/conf.d/hostname HOSTNAME="malaquias" # cat /etc/resolv.conf nameserver 200.225.197.34 nameserver 200.225.197.37 domain no-ip.org # grep '^[^#]' /etc/hosts 127.0.0.1 malaquias.no-ip.org malaquias localhost.localdomain localhost # hostname -i 127.0.0.1 # hostx dynupdate.no-ip.com dynupdate.no-ip.com A 63.215.241.204 # /etc/init.d/noip restart * Stopping noip ... [ ok ] * Setting noip addresses to 0.0.0.0 ... * Failed to set noip addresses to 0.0.0.0, error 255 [ !! ] * Starting noip ... [ ok ] # grep noip /var/log/messages | tail -n 5 Dec 5 08:05:36 malaquias noip2[11294]: v2.1.1 daemon ended. Dec 5 08:05:36 malaquias rc-scripts: Failed to set noip addresses to 0.0.0.0, error 255 Dec 5 08:05:37 malaquias noip2[11369]: v2.1.1 daemon started Dec 5 08:05:37 malaquias noip2[11369]: Can't gethostbyname for dynupdate.no-ip.com Dec 5 08:06:37 malaquias noip2[11369]: Can't gethostbyname for dynupdate.no-ip.com # epm -q baselayout baselayout-1.11.7-r2 Note that some configuration files have changed from /etc to /etc/conf.d with the latest baselayout.
Check to see if you get the same answer using dig? dig probes the servers 1st ignoring /etc/hosts. bash-2.05b$ dig @200.225.197.34 no-ip.com bash-2.05b$ dig @200.225.197.37 no-ip.com
dig succeeds in resolving dynupdate.no-ip.com and no-ip.com with the DNS servers from /etc/resolv.conf. This name lookup seems to fail only when done by the /usr/sbin/noip2 program. $ dig @200.225.197.34 dynupdate.no-ip.com ; <<>> DiG 9.2.2-P1 <<>> @200.225.197.34 dynupdate.no-ip.com ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6263 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3 ;; QUESTION SECTION: ;dynupdate.no-ip.com. IN A ;; ANSWER SECTION: dynupdate.no-ip.com. 86220 IN A 63.215.241.204 ;; AUTHORITY SECTION: no-ip.com. 85525 IN NS nf1.no-ip.com. no-ip.com. 85525 IN NS nf2.no-ip.com. no-ip.com. 85525 IN NS nf3.no-ip.com. ;; ADDITIONAL SECTION: nf1.no-ip.com. 74481 IN A 63.215.241.225 nf2.no-ip.com. 10237 IN A 63.208.74.227 nf3.no-ip.com. 171919 IN A 216.66.37.13 ;; Query time: 31 msec ;; SERVER: 200.225.197.34#53(200.225.197.34) ;; WHEN: Sun Dec 5 16:53:11 2004 ;; MSG SIZE rcvd: 155 $ dig @200.225.197.37 dynupdate.no-ip.com ; <<>> DiG 9.2.2-P1 <<>> @200.225.197.37 dynupdate.no-ip.com ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6179 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3 ;; QUESTION SECTION: ;dynupdate.no-ip.com. IN A ;; ANSWER SECTION: dynupdate.no-ip.com. 58480 IN A 63.215.241.204 ;; AUTHORITY SECTION: no-ip.com. 58247 IN NS nf3.no-ip.com. no-ip.com. 58247 IN NS nf1.no-ip.com. no-ip.com. 58247 IN NS nf2.no-ip.com. ;; ADDITIONAL SECTION: nf1.no-ip.com. 58209 IN A 63.215.241.225 nf2.no-ip.com. 58209 IN A 63.208.74.227 nf3.no-ip.com. 144608 IN A 216.66.37.13 ;; Query time: 25 msec ;; SERVER: 200.225.197.37#53(200.225.197.37) ;; WHEN: Sun Dec 5 16:53:17 2004 ;; MSG SIZE rcvd: 155
I have a little theory after looking at strace and what happens when you issue gethostbyname what are your permissions on /lib/libnss* /lib/libresolv* these files are not linked until you actually need them, and if they have some wierd permissions, setuid and friends might block your access. You could attach a strace if you are able and log what happens.
I have not used strace before. Here is the permissions on the mentioned files: # ls -l /lib/libnss* /lib/libresolv* -rwxr-xr-x 1 root root 31088 Nov 5 17:46 /lib/libnss_compat-2.3.4.so lrwxrwxrwx 1 root root 22 Nov 5 17:46 /lib/libnss_compat.so.2 -> libnss_compat-2.3.4.so -rwxr-xr-x 1 root root 18428 Nov 5 17:46 /lib/libnss_dns-2.3.4.so lrwxrwxrwx 1 root root 19 Nov 5 17:46 /lib/libnss_dns.so.2 -> libnss_dns-2.3.4.so -rwxr-xr-x 1 root root 35544 Nov 5 17:46 /lib/libnss_files-2.3.4.so lrwxrwxrwx 1 root root 21 Nov 5 17:46 /lib/libnss_files.so.2 -> libnss_files-2.3.4.so -rwxr-xr-x 1 root root 18664 Nov 5 17:46 /lib/libnss_hesiod-2.3.4.so lrwxrwxrwx 1 root root 22 Nov 5 17:46 /lib/libnss_hesiod.so.2 -> libnss_hesiod-2.3.4.so -rwxr-xr-x 1 root root 35756 Nov 5 17:46 /lib/libnss_nis-2.3.4.so lrwxrwxrwx 1 root root 19 Nov 5 17:46 /lib/libnss_nis.so.2 -> libnss_nis-2.3.4.so -rwxr-xr-x 1 root root 43860 Nov 5 17:46 /lib/libnss_nisplus-2.3.4.so lrwxrwxrwx 1 root root 23 Nov 5 17:46 /lib/libnss_nisplus.so.2 -> libnss_nisplus-2.3.4.so -rwxr-xr-x 1 root root 64964 Nov 5 17:46 /lib/libresolv-2.3.4.so lrwxrwxrwx 1 root root 18 Nov 5 17:46 /lib/libresolv.so.2 -> libresolv-2.3.4.so
When configuring squid-2.5.7 I am having similar problems: # squid -NCd1 2005/01/15 10:34:33| Starting Squid Cache version 2.5.STABLE7 for i686-pc-linux-gnu... 2005/01/15 10:34:33| Process ID 21427 2005/01/15 10:34:33| With 1024 file descriptors available 2005/01/15 10:34:33| Performing DNS Tests... FATAL: ipcache_init: DNS name lookup tests failed. Aborted # grep dns_testnames /etc/squid/squid.conf.default # TAG: dns_testnames # dns_testnames netscape.com internic.net nlanr.net microsoft.com From the Squid FAQ (http://www.squid-cache.org/Doc/FAQ/FAQ-11.html#ss11.21): ----------------------------------------------------------------- FATAL: ipcache_init: DNS name lookup tests failed Squid normally tests your system's DNS configuration before it starts server requests. Squid tries to resolve some common DNS names, as defined in the dns_testnames configuration directive. If Squid cannot resolve these names, it could mean: 1. your DNS nameserver is unreachable or not running. 2. your /etc/resolv.conf file may contain incorrect information. 3. your /etc/resolv.conf file may have incorrect permissions, and may be unreadable by Squid. ----------------------------------------------------------------- The host names tested by squid (netscape.com internic.net nlanr.net microsoft.com) are all resolved by dig, nslookup and host. So definitely there is something wrong in name resolution in my box, but only with certain applications like noip2, squid and cvs. But I can not find what it is. I am needing help to solve this bug.
emerge strace, read the man page, and attach output.
I have upgraded my hardware from an athlon-xp to an athlon-64, reinstalled Gentoo Linux (for the amd64 archtecture this time) and the bug is not present anymore in the new system.
gald its working for you now.
(In reply to comment #0) > The noip2 program from the net-dns/noip-updater package is failing with the > error message "Can't gethostbyname for dynupdate.no-ip.com", although name > resolution is working in my system. I too am having problems with noip-updater. Mine is setting the IP to 0.0.0.0 It started doing this out of the blue after workign fine for ages. I have tried re-install, re-config, restart. Nothing works. Any idea's? Ken - vk4akp@yahoo.com.au .-.-.
Suddenly ran into this problem too. Solution for me came out comment #3 : emerge net-misc/host
