Re: Debian squeeze (testing) dns problems
Sven Joachim svenj...@gmx.de writes: On 2009-05-08 14:28 +0200, Hugh Lawson wrote: My newly installed squeeze has problems with DNS. Specificially, Emacs gnus and evolution cannot reliably find their respective servers. Sven wrote: This seems to be a libc6 problem, see bugs #516218¹ and #517360². You may want to upgrade the libc6 package to the version in sid -- but avoid version 2.9-11, it is broken as well³. Either install 2.9-10 or wait for 2.9-12. Hugh again: Thanks to Sven and Bob for the help. I can work around this problem by configuring these programs with the IP of their respective servers. This works very well. Hugh -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Debian squeeze (testing) dns problems
Hello, I hope there will be some suggestions for this. This is a single-user box, managed by an amateur (me). This is surprising and baffling; it makes me suspect I've made some basic error in configuration, but I can't find it. My newly installed squeeze has problems with DNS. Specificially, Emacs gnus and evolution cannot reliably find their respective servers. If I configure the applications with 'pop-server.triad.rr.com', for example, they report that they cannot find the server. But if I configure them with the IP of the server,they work OK. OTOH iceweasel works fine. As far as I can tell, nslookup, ping, and host work as expected. A lenny install on the same hardware works fine. Things I've already tried: Configuring applications with IP rather that URL of server. Works Changing the name-servers in /etc/resolv.conf--makes no difference. Reinstalling squeeze with a later netinst cd--makes no difference. -- Hugh Lawson hlaw...@triad.rr.com -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Re: Debian squeeze (testing) dns problems
On Fri, May 08, 2009 at 08:28:15 -0400, Hugh Lawson (hlaw...@triad.rr.com) wrote: Hello, I hope there will be some suggestions for this. This is a single-user box, managed by an amateur (me). This is surprising and baffling; it makes me suspect I've made some basic error in configuration, but I can't find it. My newly installed squeeze has problems with DNS. Specificially, Emacs gnus and evolution cannot reliably find their respective servers. If I configure the applications with 'pop-server.triad.rr.com', for example, they report that they cannot find the server. But if I configure them with the IP of the server,they work OK. OTOH iceweasel works fine. As far as I can tell, nslookup, ping, and host work as expected. A lenny install on the same hardware works fine. Things I've already tried: Configuring applications with IP rather that URL of server. Works Changing the name-servers in /etc/resolv.conf--makes no difference. Reinstalling squeeze with a later netinst cd--makes no difference. Presumably, the applications you mention as having problems are using fetchmail to retrieve mail from pop-server.triad.rr.com? What do you see if you run fetchmail directly from the command line with fetchmail -vvv ? (I have just tried this from here with a dummy username and password and connected successfully with pop-server.triad.rr.com on the POP3 port, 110). fetchmail: 6.3.9-rc2 querying pop-server.triad.rr.com (protocol POP3) at Fri 08 May 2009 14:18:40 BST: poll started Trying to connect to 71.74.56.73/110...connected. fetchmail: POP3 +OK POP3 server ready. fetchmail: POP3 CAPA fetchmail: POP3 +OK Capability list follows fetchmail: POP3 TOP fetchmail: POP3 USER fetchmail: POP3 RESP_CODES fetchmail: POP3 PIPELINING fetchmail: POP3 EXPIRE NEVER fetchmail: POP3 UIDL fetchmail: POP3 . fetchmail: pop-server.triad.rr.com: opportunistic upgrade to TLS failed, trying to continue. fetchmail: POP3 USER test fetchmail: POP3 +OK please send PASS command fetchmail: POP3 PASS * fetchmail: POP3 -ERR invalid user name or password. -- Bob Cox. Stoke Gifford, near Bristol, UK. Please reply to the list only. Do NOT send copies directly to me. http://bobcox.com/ -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Re: Debian squeeze (testing) dns problems
Bob Cox debian-u...@lists.bobcox.com writes: [ snip ] Hugh wrote: My newly installed squeeze has problems with DNS. Specificially, Emacs gnus and evolution cannot reliably find their respective servers. Bob asks: What do you see if you run fetchmail directly from the command line with fetchmail -vvv ? Hugh replies: Thanks for the reply; here goes: hlaw...@desktop:~$ fetchmail -vv fetchmail: 6.3.9-rc2 querying pop-server.triad.rr.com (protocol POP3) at Fri 08 May 2009 09:50:07 AM EDT: poll started fetchmail: getaddrinfo(pop-server.triad.rr.com,pop3) error: Name or service not known POP3 connection to pop-server.triad.rr.com failed: No such file or directory fetchmail: 6.3.9-rc2 querying pop-server.triad.rr.com (protocol POP3) at Fri 08 May 2009 09:50:22 AM EDT: poll completed fetchmail: Query status=2 (SOCKET) fetchmail: normal termination, status 2 Occasionally fetchmail connects; the same is true with emacs gnus. Moreover the 'host' command works as expected. $ host pop-server.triad.rr.com pop-server.triad.rr.com has address 71.74.56.73 Now if I put '71.74.56.73' in the .fetchmailrc in place of 'pop-server.triad.rr.com' I get this in return: $ fetchmail -vv fetchmail: 6.3.9-rc2 querying 71.74.56.73 (protocol POP3) at Fri 08 May 2009 10:01:55 AM EDT: poll started Trying to connect to 71.74.56.73/110...connected. fetchmail: POP3 +OK POP3 server ready. fetchmail: POP3 USER hlawson fetchmail: POP3 +OK please send PASS command fetchmail: POP3 PASS * fetchmail: POP3 +OK hlawson is welcome here fetchmail: selecting or re-polling default folder and so on, a normal reply. With the IP service is very fast. With the name, there is a delay of 20 seconds or so before error message. Hugh -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Re: Debian squeeze (testing) dns problems
Hugh Lawson writes: Bob Cox debian-u...@lists.bobcox.com writes: [ snip ] fetchmail: getaddrinfo(pop-server.triad.rr.com,pop3) error: Name or I tried the following: host -a pop-server.triad.rr.com to see what sort of DNS lookup we get: Trying pop-server.triad.rr.com pop-server.triad.rr.com. 232IN A 71.74.56.73 triad.rr.com. 3532IN NS dns-sec-01.southeast.rr.com. triad.rr.com. 3532IN NS dns-pri-01.southeast.rr.com. dns-pri-01.southeast.rr.com. 3007 INA 24.25.4.103 dns-sec-01.southeast.rr.com. 3007 INA 24.25.4.104 pop-server.triad.rr.com's DNS TTL or time to live is only about 5 minutes. This is the amount of time that your cache will remember it after having looked it up. Actually, in my example, it is 232 seconds or 2 minutes and 12 seconds so it could be anything up to around 5 minutes. There is nothing wrong with that if you have good communications with one of the DNS's shown as authoritative for that domain. If you don't, you've got an intermittent problem as your resolver is doing exactly what it is supposed to do. It remembers for up to 5 minutes and then does another lookup after that to refresh itself and, if it can't contact one of the DNS's listed there, the lookup fails. The short TTL for the pop server may be a load balancing strategy so this isn't necessarily a bad thing but it turns bad if connectivity to the authoritative DNS's or functionality of the DNS's is poor. My apology if this sounds like no help, but it may be an explanation of why the lookup sometimes fails. Martin McCormick WB5AGZ Stillwater, OK Systems Engineer OSU Information Technology Department Telecommunications Services Group -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Re: Debian squeeze (testing) dns problems
On 2009-05-08 14:28 +0200, Hugh Lawson wrote: I hope there will be some suggestions for this. This is a single-user box, managed by an amateur (me). This is surprising and baffling; it makes me suspect I've made some basic error in configuration, but I can't find it. My newly installed squeeze has problems with DNS. Specificially, Emacs gnus and evolution cannot reliably find their respective servers. This seems to be a libc6 problem, see bugs #516218¹ and #517360². You may want to upgrade the libc6 package to the version in sid -- but avoid version 2.9-11, it is broken as well³. Either install 2.9-10 or wait for 2.9-12. Sven ¹ http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=516218 ² http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=517360 ³ http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=527541 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
