Re: What is the difference between "No address associated with name" and "Unknown host"
On 12/4/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: What is the difference between "No address associated with name" and "Unknown host": $ ping accounts.eirtrade.ie ping: cannot resolve accounts.eirtrade.ie: No address associated with name and $ ping accounts.eirtrade.i ping: cannot resolve accounts.eirtrade.i: Unknown host The source of my interest is the next. My sendmail receives mail from senders with domains like the first, but rejects mail from the last: $ telnet localhost 25 Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 host.my.domain ESMTP Sendmail 8.13.7/8.13.6; Mon, 4 Dec 2006 21:38:50 +0200 (EET) HELO localhost 250 host.my.domain Hello localhost [127.0.0.1], pleased to meet you MAIL From: [EMAIL PROTECTED] 250 2.1.0 [EMAIL PROTECTED] Sender ok RSET 250 2.0.0 Reset state MAIL From: [EMAIL PROTECTED] 553 5.1.8 [EMAIL PROTECTED] Domain of sender address [EMAIL PROTECTED] does not exist QUIT 221 2.0.0 host.my.domain closing connection Connection closed by foreign host. Elisej Babenko I get the same problem with my laptop which uses DHCP in FreeBSD 6.2-RC1 and earlier was using 6.1-S, this happens to me regurarely even I just opened an address in FF, then again trying to open same host via FF. Is there away to cache dns locally in my laptop? Thank you, -Abdullah ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: What is the difference between "No address associated with name" and "Unknown host"
If you have the "dig" command available on your machine, you can read its documentation, and play with it. It will make things clear. Look below: in the first case, there is no A record, but there is a SOA record. However, the hostname of the SOA is different from the queried hostname. In the second case, there is no A record, there is a SOA and the hostname of the SOA and the queried hostname are the same. So in the first case, we cannot know if the host is registered at all. In the second case, the hostname is registered for sure, but it has no A record. (However, subdomains like www.eirtrade.ie can have A records...) #dig accounts.eirtrade.ie Sorry, try this with accounts.eirtrade.i instead of accounts.eirtrade.ie. :-) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: What is the difference between "No address associated with name" and "Unknown host"
On Dec 4, 2006, at 11:54 AM, [EMAIL PROTECTED] wrote: What is the difference between "No address associated with name" and "Unknown host": The former means there is no A record in the DNS for the hostname, but there is a DNS record for the domain and that it answered the question as such. The latter indicates that the domain itself was invalid, and you got an NXDOMAIN response rather than NOERROR. $ ping accounts.eirtrade.ie ping: cannot resolve accounts.eirtrade.ie: No address associated with name and $ ping accounts.eirtrade.i ping: cannot resolve accounts.eirtrade.i: Unknown host % dig accounts.eirtrade.ie ; <<>> DiG 9.3.2 <<>> accounts.eirtrade.ie ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53319 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;accounts.eirtrade.ie. IN A ;; AUTHORITY SECTION: eirtrade.ie.10703 IN SOA auth01.ns.eircom.net. hostmaster.eircom.net. 2001031301 28800 7200 604800 86400 ;; Query time: 1 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Mon Dec 4 15:09:19 2006 ;; MSG SIZE rcvd: 105 % dig accounts.eirtrade.i ; <<>> DiG 9.3.2 <<>> accounts.eirtrade.i ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 18893 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;accounts.eirtrade.i. IN A ;; AUTHORITY SECTION: . 10718 IN SOA A.ROOT-SERVERS.NET. NSTLD.VERISIGN-GRS.COM. 2006120400 1800 900 604800 86400 ;; Query time: 1 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Mon Dec 4 15:10:35 2006 ;; MSG SIZE rcvd: 112 -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: What is the difference between "No address associated with name" and "Unknown host"
[EMAIL PROTECTED] wrote: What is the difference between "No address associated with name" and "Unknown host": $ ping accounts.eirtrade.ie ping: cannot resolve accounts.eirtrade.ie: No address associated with name and $ ping accounts.eirtrade.i ping: cannot resolve accounts.eirtrade.i: Unknown host If the host is unknown, then it means that the primary domain name server is not registered for the given domain. Because the domain name server cannot be found, it is not possible to tell the IP address of the given hostname. You get the second message when there is a primary domain name server for the given domain, but it does not return any IP address for your (named) address. It means that there is no A record for the given hostname. For me, I get these results: #ping acconts.eirtrade.ie ping: cannot resolve acconts.eirtrade.ie: Unknown host #ping eirtrade.ie ping: cannot resolve eirtrade.ie: No address associated with name If you have the "dig" command available on your machine, you can read its documentation, and play with it. It will make things clear. Look below: in the first case, there is no A record, but there is a SOA record. However, the hostname of the SOA is different from the queried hostname. In the second case, there is no A record, there is a SOA and the hostname of the SOA and the queried hostname are the same. So in the first case, we cannot know if the host is registered at all. In the second case, the hostname is registered for sure, but it has no A record. (However, subdomains like www.eirtrade.ie can have A records...) #dig accounts.eirtrade.ie ; <<>> DiG 9.3.2 <<>> accounts.eirtrade.ie ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50610 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;accounts.eirtrade.ie. IN A ;; AUTHORITY SECTION: eirtrade.ie.10515 IN SOA auth01.ns.eircom.net. hostmaster.eircom.net. 2001031301 28800 7200 604800 86400 ;; Query time: 1 msec ;; SERVER: 195.228.240.249#53(195.228.240.249) ;; WHEN: Mon Dec 4 15:02:25 2006 ;; MSG SIZE rcvd: 105 #dig eirtrade.ie ; <<>> DiG 9.3.2 <<>> eirtrade.ie ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 932 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;eirtrade.ie. IN A ;; AUTHORITY SECTION: eirtrade.ie.10800 IN SOA auth01.ns.eircom.net. hostmaster.eircom.net. 2001031301 28800 7200 604800 86400 ;; Query time: 37 msec ;; SERVER: 195.228.240.249#53(195.228.240.249) ;; WHEN: Mon Dec 4 15:03:17 2006 ;; MSG SIZE rcvd: 96 Best, Laszlo p.s.: I think I'm right, but please do not trust me blindly. :-) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
What is the difference between "No address associated with name" and "Unknown host"
What is the difference between "No address associated with name" and "Unknown host": $ ping accounts.eirtrade.ie ping: cannot resolve accounts.eirtrade.ie: No address associated with name and $ ping accounts.eirtrade.i ping: cannot resolve accounts.eirtrade.i: Unknown host The source of my interest is the next. My sendmail receives mail from senders with domains like the first, but rejects mail from the last: $ telnet localhost 25 Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 host.my.domain ESMTP Sendmail 8.13.7/8.13.6; Mon, 4 Dec 2006 21:38:50 +0200 (EET) HELO localhost 250 host.my.domain Hello localhost [127.0.0.1], pleased to meet you MAIL From: [EMAIL PROTECTED] 250 2.1.0 [EMAIL PROTECTED] Sender ok RSET 250 2.0.0 Reset state MAIL From: [EMAIL PROTECTED] 553 5.1.8 [EMAIL PROTECTED] Domain of sender address [EMAIL PROTECTED] does not exist QUIT 221 2.0.0 host.my.domain closing connection Connection closed by foreign host. Elisej Babenko ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
