Re: sendmail: Operation timed out with
On Wed, 3 Mar 2004 07:15:05 + Matthew Seaman [EMAIL PROTECTED] wrote: On Tue, Mar 02, 2004 at 08:11:36PM -0500, Justin Brody wrote: A couple pieces of information that might be relevant: About a month ago, I was running the same FBSD version with the same sendmail.cf from behind a different router connected to a different cable modem and calling my box cogito.none.org. This seemed to work o.k. After sleeping on it, I'm starting to think that the problem is not actually within the SMTP setup, but is rather something to do with firewalling or similar measures. Does your ISP permit you to run SMTP servers? Many have been bitten very badly by clueless windows users, and so deny use of SMTP to all. Sometime this proscription also extends to enforcement by transparent proxying or other measures to control SMTP traffic from their clients. You should check with them as to what their policy is. Can you telnet to port 25 on the UMD server or the ISP's server you're trying to connect to? If you can't get a connection established, I'd suspect the problem is firewalling somewhere between you and them. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK FWIW I once had similar problems properly sending mail to a particular ISP mail server (it would timeout just like this one but work fine for other destination mail servers). Manually running the queue in verbose mode would indicate that it was connecting properly but hanging at the data send stage until timing out about five minutes later. Had me baffled because I had been connecting to that server maybe two weeks before without a hitch and hadn't changed my sendmail config in that time. After searching google and pouring through the FAQ and other docs at sendmail.org I found a reference to possibly misconfigured intermediary routers not handling the icmp packets on which the PMTU Discovery feature needs to work properly (set by default on both FBSD and OBSD I believe). I disabled PMTU Discovery in /etc/sysctl.conf on my gateway host and through some ping tests derived 1404 as the optimal PMTU (I'm on a DSL connection) between my site and the troublesome mail server. I set this number manually for the outgoing interface on my gateway through an ifconfig parameter and the problem disappeared. I have been able to connect properly to that mail server ever since. Just another potential avenue to investigate... EB ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail: Operation timed out with
Well, after all it seems I was trying to relay through the wrong server. I changed that and seem to be able to send mail at least. Perhaps the firewall makes the most sense for explaining why I seem to NEED to use a relay server now. Thanks so much for the help! -Justin Brody MS == Matthew Seaman [EMAIL PROTECTED] writes: MS --IrhDeMKUP4DT/M7F Content-Type: text/plain; charset=us-ascii MS Content-Disposition: inline Content-Transfer-Encoding: MS quoted-printable MS On Tue, Mar 02, 2004 at 08:11:36PM -0500, Justin Brody wrote: A couple pieces of information that might be relevant: About a month ago, I was running the same FBSD version with the same sendmail.cf from behind a different router connected to a different cable modem and calling my box cogito.none.org. This seemed to work o.k. MS After sleeping on it, I'm starting to think that the problem MS is not actually within the SMTP setup, but is rather something MS to do with firewalling or similar measures. Does your ISP MS permit you to run SMTP servers? Many have been bitten very MS badly by clueless windows users, and so deny use of SMTP to MS all. Sometime this proscription also extends to enforcement MS by transparent proxying or other measures to control SMTP MS traffic from their clients. You should check with them as to MS what their policy is. MS Can you telnet to port 25 on the UMD server or the ISP's MS server you're trying to connect to? If you can't get a MS connection established, I'd suspect the problem is firewalling MS somewhere between you and them. MS Cheers, MS Matthew MS --=20 Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill MS Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: MS +44 1628 476614 Bucks., SL7 1TH UK MS --IrhDeMKUP4DT/M7F Content-Type: application/pgp-signature MS Content-Disposition: inline MS -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.4 (FreeBSD) MS iD8DBQFARYX4dtESqEQa7a0RAk+IAJ4ub5jwhhkFdI6xls3FsFhp6yAO1wCfWR5/ MS hw1fo8f416dSQ2EBqQVCzaY= =PNiO -END PGP SIGNATURE- MS --IrhDeMKUP4DT/M7F-- ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail: Operation timed out with
On Tue, Mar 02, 2004 at 03:15:48PM -0500, Justin Brody wrote: I can't send any mail though. The first entries in my mail queue: i22K75of000208 3 Tue Mar 2 15:07 [EMAIL PROTECTED] (Deferred: Operation timed out with math.umd.edu.) [EMAIL PROTECTED] i22K6mof000198 5 Tue Mar 2 15:06 [EMAIL PROTECTED] (Deferred: Operation timed out with math.umd.edu.) [EMAIL PROTECTED] Hmmm... Is there any more information in /var/log/maillog? What's the result of running: /usr/sbin/sendmail -q -v -- or at least the beginning of the SMTP dialog up to attempting to send the first message. I note you're using 'none.org' as a domain name -- that used to be a registered domain for a corporation in Korea (it's on 'client hold pending delete' at the moment). Seems to have disappeared from the DNS though. You'll find that sendmail works a lot better if you use correctly registered domain names -- although it should cope without. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK pgp0.pgp Description: PGP signature
Re: sendmail: Operation timed out with
Here's a bit from /var/log/maillog: Mar 2 16:40:39 aleph sendmail[327]: i1SGr1hh004059: to=[EMAIL PROTECTED], de lay=3+04:47:38, xdelay=00:00:00, mailer=esmtp, pri=8130413, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Mar 2 16:40:39 aleph sendmail[327]: i1S4wehh000450: to=[EMAIL PROTECTED], ctladdr=[EMAIL PROTECTED] (1001/1001), delay=3+16:41:59, xdelay=00:00:00, mailer=esmtp, pri=10290322, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Don't know if that says anything new. I would wonder if it's some sort of lookup based on ctladdr, but I get the same error if use -f [EMAIL PROTECTED] which does show up in that field. sendmail -q -v reports: aleph# sendmail -q -v Running /var/spool/mqueue/i22M7pof000364 (sequence 1 of 17) [EMAIL PROTECTED]... Connecting to math.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with math.umd.edu. Running /var/spool/mqueue/i22KDkof000227 (sequence 2 of 17) [EMAIL PROTECTED]... Connecting to po1.wam.umd.edu. via esmtp.. [EMAIL PROTECTED]... Connecting to po2.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Connecting to po0.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with po0.wam.umd.edu. etc... I'll give a shot at changing my domain name - what should I use? I'm a bit too poor to actually buy one :) Should I just change to use my ISP's domain? Thanks for the help! On Tue, 2 Mar 2004, Matthew Seaman wrote: On Tue, Mar 02, 2004 at 03:15:48PM -0500, Justin Brody wrote: I can't send any mail though. The first entries in my mail queue: i22K75of000208 3 Tue Mar 2 15:07 [EMAIL PROTECTED] (Deferred: Operation timed out with math.umd.edu.) [EMAIL PROTECTED] i22K6mof000198 5 Tue Mar 2 15:06 [EMAIL PROTECTED] (Deferred: Operation timed out with math.umd.edu.) [EMAIL PROTECTED] Hmmm... Is there any more information in /var/log/maillog? What's the result of running: /usr/sbin/sendmail -q -v -- or at least the beginning of the SMTP dialog up to attempting to send the first message. I note you're using 'none.org' as a domain name -- that used to be a registered domain for a corporation in Korea (it's on 'client hold pending delete' at the moment). Seems to have disappeared from the DNS though. You'll find that sendmail works a lot better if you use correctly registered domain names -- although it should cope without. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail: Operation timed out with
On Tue, Mar 02, 2004 at 05:23:52PM -0500, Justin Brody wrote: Here's a bit from /var/log/maillog: Mar 2 16:40:39 aleph sendmail[327]: i1SGr1hh004059: to=[EMAIL PROTECTED], de lay=3+04:47:38, xdelay=00:00:00, mailer=esmtp, pri=8130413, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Mar 2 16:40:39 aleph sendmail[327]: i1S4wehh000450: to=[EMAIL PROTECTED], ctladdr=[EMAIL PROTECTED] (1001/1001), delay=3+16:41:59, xdelay=00:00:00, mailer=esmtp, pri=10290322, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Don't know if that says anything new. I would wonder if it's some sort of lookup based on ctladdr, but I get the same error if use -f [EMAIL PROTECTED] which does show up in that field. sendmail -q -v reports: aleph# sendmail -q -v Running /var/spool/mqueue/i22M7pof000364 (sequence 1 of 17) [EMAIL PROTECTED]... Connecting to math.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with math.umd.edu. Running /var/spool/mqueue/i22KDkof000227 (sequence 2 of 17) [EMAIL PROTECTED]... Connecting to po1.wam.umd.edu. via esmtp.. [EMAIL PROTECTED]... Connecting to po2.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Connecting to po0.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with po0.wam.umd.edu. etc... Bah! All that says is connection timeout. No indication of *why*. You're not even getting the SMTP banner there. I suspect it's probably something to do with an administrative descision on behalf of UMD admins -- perhaps they reject connections to hosts in DUL block lists. I'll give a shot at changing my domain name - what should I use? I'm a bit too poor to actually buy one :) Should I just change to use my ISP's domain? Yes -- do a reverse lookup on your IP number and use that name in your sendmail config. It may not look pretty, but it should let you see if that is the problem. The other thing to do is forward all of your e-mail via your ISP's smart host. As you are probably expected to do. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK pgp0.pgp Description: PGP signature
Re: sendmail: Operation timed out with
Well, I tried forwarding to my Smart relay host and get the same error message, with via relay... appended. On the other hand, a reverse DNS lookup doesn't work - perhaps this is my entire problem? I'm not sure how to fix it if so! Here's some output: aleph# ifconfig rl0 rl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 inet6 fe80::2e0:4cff:fe98:36fa%rl0 prefixlen 64 scopeid 0x1 inet 192.168.0.197 netmask 0xff00 broadcast 192.168.0.255 ether 00:e0:4c:98:36:fa media: Ethernet autoselect (100baseTX full-duplex) status: active aleph# nslookup 192.168.0.197 Server: ns1.dc.cox.net Address: 68.100.16.30 *** ns1.dc.cox.net can't find 192.168.0.197: Non-existent host/domain aleph# cat /etc/resolv.conf search dc.dc.cox.net nameserver 68.100.16.30 nameserver 68.100.16.25 I do have an entry in my /etc/hosts file: 192.168.0.197 aleph.cox.net aleph But apparently it's not reading that. [the change to cox.net is just 5 minutes old, BTW]. Thanks again for the help! On Tue, 2 Mar 2004, Matthew Seaman wrote: On Tue, Mar 02, 2004 at 05:23:52PM -0500, Justin Brody wrote: Here's a bit from /var/log/maillog: Mar 2 16:40:39 aleph sendmail[327]: i1SGr1hh004059: to=[EMAIL PROTECTED], de lay=3+04:47:38, xdelay=00:00:00, mailer=esmtp, pri=8130413, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Mar 2 16:40:39 aleph sendmail[327]: i1S4wehh000450: to=[EMAIL PROTECTED], ctladdr=[EMAIL PROTECTED] (1001/1001), delay=3+16:41:59, xdelay=00:00:00, mailer=esmtp, pri=10290322, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Don't know if that says anything new. I would wonder if it's some sort of lookup based on ctladdr, but I get the same error if use -f [EMAIL PROTECTED] which does show up in that field. sendmail -q -v reports: aleph# sendmail -q -v Running /var/spool/mqueue/i22M7pof000364 (sequence 1 of 17) [EMAIL PROTECTED]... Connecting to math.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with math.umd.edu. Running /var/spool/mqueue/i22KDkof000227 (sequence 2 of 17) [EMAIL PROTECTED]... Connecting to po1.wam.umd.edu. via esmtp.. [EMAIL PROTECTED]... Connecting to po2.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Connecting to po0.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with po0.wam.umd.edu. etc... Bah! All that says is connection timeout. No indication of *why*. You're not even getting the SMTP banner there. I suspect it's probably something to do with an administrative descision on behalf of UMD admins -- perhaps they reject connections to hosts in DUL block lists. I'll give a shot at changing my domain name - what should I use? I'm a bit too poor to actually buy one :) Should I just change to use my ISP's domain? Yes -- do a reverse lookup on your IP number and use that name in your sendmail config. It may not look pretty, but it should let you see if that is the problem. The other thing to do is forward all of your e-mail via your ISP's smart host. As you are probably expected to do. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail: Operation timed out with
Justin Brody wrote: On Tue, 2 Mar 2004, Matthew Seaman wrote: On Tue, Mar 02, 2004 at 05:23:52PM -0500, Justin Brody wrote: Here's a bit from /var/log/maillog: Mar 2 16:40:39 aleph sendmail[327]: i1SGr1hh004059: to=[EMAIL PROTECTED], de lay=3+04:47:38, xdelay=00:00:00, mailer=esmtp, pri=8130413, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Mar 2 16:40:39 aleph sendmail[327]: i1S4wehh000450: to=[EMAIL PROTECTED], ctladdr=[EMAIL PROTECTED] (1001/1001), delay=3+16:41:59, xdelay=00:00:00, mailer=esmtp, pri=10290322, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Don't know if that says anything new. I would wonder if it's some sort of lookup based on ctladdr, but I get the same error if use -f [EMAIL PROTECTED] which does show up in that field. sendmail -q -v reports: aleph# sendmail -q -v Running /var/spool/mqueue/i22M7pof000364 (sequence 1 of 17) [EMAIL PROTECTED]... Connecting to math.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with math.umd.edu. Running /var/spool/mqueue/i22KDkof000227 (sequence 2 of 17) [EMAIL PROTECTED]... Connecting to po1.wam.umd.edu. via esmtp.. [EMAIL PROTECTED]... Connecting to po2.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Connecting to po0.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with po0.wam.umd.edu. etc... Bah! All that says is connection timeout. No indication of *why*. You're not even getting the SMTP banner there. I suspect it's probably something to do with an administrative descision on behalf of UMD admins -- perhaps they reject connections to hosts in DUL block lists. I'll give a shot at changing my domain name - what should I use? I'm a bit too poor to actually buy one :) Should I just change to use my ISP's domain? Yes -- do a reverse lookup on your IP number and use that name in your sendmail config. It may not look pretty, but it should let you see if that is the problem. The other thing to do is forward all of your e-mail via your ISP's smart host. As you are probably expected to do. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Well, I tried forwarding to my Smart relay host and get the same error message, with via relay... appended. On the other hand, a reverse DNS lookup doesn't work - perhaps this is my entire problem? I'm not sure how to fix it if so! Here's some output: aleph# ifconfig rl0 rl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 inet6 fe80::2e0:4cff:fe98:36fa%rl0 prefixlen 64 scopeid 0x1 inet 192.168.0.197 netmask 0xff00 broadcast 192.168.0.255 ether 00:e0:4c:98:36:fa media: Ethernet autoselect (100baseTX full-duplex) status: active aleph# nslookup 192.168.0.197 Server: ns1.dc.cox.net Address: 68.100.16.30 *** ns1.dc.cox.net can't find 192.168.0.197: Non-existent host/domain aleph# cat /etc/resolv.conf search dc.dc.cox.net nameserver 68.100.16.30 nameserver 68.100.16.25 I do have an entry in my /etc/hosts file: 192.168.0.197 aleph.cox.net aleph But apparently it's not reading that. [the change to cox.net is just 5 minutes old, BTW]. Thanks again for the help! Hi Justin... Matthew meant do a reverse lookup on your *public* IP number. (As you probably know, 192.168.x.x is an RFC 1918 private [non-routable] network address.) You can use nslookup for this, but supposedly it is (or is becoming) deprecated in favor of dig(1). However, I'm lazy, and just use host(1). :-D Based on your last email, I'm thinking you're at 129.2.56.21, which is archimedes.math.umd.edu But that doesn't agree with what you've written. What's the output of ifconfig? Kevin Kinsey DaleCo, S.P. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: sendmail: Operation timed out with
Hi Kevin, Thanks for the clarification. I don't have a public IP address, at least as far as I know! I'm basically operating from behind a router that's conencted to a cable modem. archimedes.math.umd.edu is the machine i'm sending mail from, but this is through an SSH connection and only because i'm not able to send it from my BSD box. Would this be my problem? A couple pieces of information that might be relevant: About a month ago, I was running the same FBSD version with the same sendmail.cf from behind a different router connected to a different cable modem and calling my box cogito.none.org. This seemed to work o.k. I've tried adding O HostsFilfe=/etc/hosts to sendmail.cf which didn't seem to help. ifconfig says: aleph# ifconfig rl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 inet6 fe80::2e0:4cff:fe98:36fa%rl0 prefixlen 64 scopeid 0x1 inet 192.168.0.197 netmask 0xff00 broadcast 192.168.0.255 ether 00:e0:4c:98:36:fa media: Ethernet autoselect (100baseTX full-duplex) status: active faith0: flags=8002BROADCAST,MULTICAST mtu 1500 lo0: flags=8049UP,LOOPBACK,RUNNING,MULTICAST mtu 16384 inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 inet 127.0.0.1 netmask 0xff00 ppp0: flags=8010POINTOPOINT,MULTICAST mtu 1500 Thanks again! On Tue, 2 Mar 2004, Kevin D. Kinsey, DaleCo, S.P. wrote: Justin Brody wrote: On Tue, 2 Mar 2004, Matthew Seaman wrote: On Tue, Mar 02, 2004 at 05:23:52PM -0500, Justin Brody wrote: Here's a bit from /var/log/maillog: Mar 2 16:40:39 aleph sendmail[327]: i1SGr1hh004059: to=[EMAIL PROTECTED], de lay=3+04:47:38, xdelay=00:00:00, mailer=esmtp, pri=8130413, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Mar 2 16:40:39 aleph sendmail[327]: i1S4wehh000450: to=[EMAIL PROTECTED], ctladdr=[EMAIL PROTECTED] (1001/1001), delay=3+16:41:59, xdelay=00:00:00, mailer=esmtp, pri=10290322, relay=math.umd.edu., dsn=4.0.0, stat=Deferred: Operation timed out with math.umd.edu. Don't know if that says anything new. I would wonder if it's some sort of lookup based on ctladdr, but I get the same error if use -f [EMAIL PROTECTED] which does show up in that field. sendmail -q -v reports: aleph# sendmail -q -v Running /var/spool/mqueue/i22M7pof000364 (sequence 1 of 17) [EMAIL PROTECTED]... Connecting to math.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with math.umd.edu. Running /var/spool/mqueue/i22KDkof000227 (sequence 2 of 17) [EMAIL PROTECTED]... Connecting to po1.wam.umd.edu. via esmtp.. [EMAIL PROTECTED]... Connecting to po2.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Connecting to po0.wam.umd.edu. via esmtp... [EMAIL PROTECTED]... Deferred: Operation timed out with po0.wam.umd.edu. etc... Bah! All that says is connection timeout. No indication of *why*. You're not even getting the SMTP banner there. I suspect it's probably something to do with an administrative descision on behalf of UMD admins -- perhaps they reject connections to hosts in DUL block lists. I'll give a shot at changing my domain name - what should I use? I'm a bit too poor to actually buy one :) Should I just change to use my ISP's domain? Yes -- do a reverse lookup on your IP number and use that name in your sendmail config. It may not look pretty, but it should let you see if that is the problem. The other thing to do is forward all of your e-mail via your ISP's smart host. As you are probably expected to do. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Well, I tried forwarding to my Smart relay host and get the same error message, with via relay... appended. On the other hand, a reverse DNS lookup doesn't work - perhaps this is my entire problem? I'm not sure how to fix it if so! Here's some output: aleph# ifconfig rl0 rl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 inet6 fe80::2e0:4cff:fe98:36fa%rl0 prefixlen 64 scopeid 0x1 inet 192.168.0.197 netmask 0xff00 broadcast 192.168.0.255 ether 00:e0:4c:98:36:fa media: Ethernet autoselect (100baseTX full-duplex) status: active aleph# nslookup 192.168.0.197 Server: ns1.dc.cox.net Address: 68.100.16.30 *** ns1.dc.cox.net can't find 192.168.0.197: Non-existent host/domain aleph# cat /etc/resolv.conf search dc.dc.cox.net nameserver 68.100.16.30 nameserver 68.100.16.25 I do have an entry in my /etc/hosts file: 192.168.0.197 aleph.cox.net aleph But apparently it's not reading that. [the change to cox.net is just 5 minutes old, BTW]. Thanks again for the help! Hi Justin... Matthew meant do a reverse lookup on your *public* IP number. (As you probably know, 192.168.x.x is an RFC 1918 private [non-routable] network address.) You can use nslookup for this,
Re: sendmail: Operation timed out with
On Tue, Mar 02, 2004 at 08:11:36PM -0500, Justin Brody wrote: A couple pieces of information that might be relevant: About a month ago, I was running the same FBSD version with the same sendmail.cf from behind a different router connected to a different cable modem and calling my box cogito.none.org. This seemed to work o.k. After sleeping on it, I'm starting to think that the problem is not actually within the SMTP setup, but is rather something to do with firewalling or similar measures. Does your ISP permit you to run SMTP servers? Many have been bitten very badly by clueless windows users, and so deny use of SMTP to all. Sometime this proscription also extends to enforcement by transparent proxying or other measures to control SMTP traffic from their clients. You should check with them as to what their policy is. Can you telnet to port 25 on the UMD server or the ISP's server you're trying to connect to? If you can't get a connection established, I'd suspect the problem is firewalling somewhere between you and them. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK pgp0.pgp Description: PGP signature
