When I try to telnet to one of my sun servers, this error appears:
# telnet localhost Trying 127.0.0.1... Connected to localhost. Escape character is '^]'.
SunOS 5.8
Connection closed by foreign host.
And then I'm returned to the prompt. Any ideas what the problem is?
Thanks in advance, AG
-- -- |"The physicist's greatest tool is his wastebasket." - Albert Einstein. |"When did ignorance become a point of view ? - Scott Adams. |"The collective IQ of a location is inversely proportional to the number of people gathered."
In comp.unix.admin killahertz <killahe...@world-domination.net> wrote:
> Hi All, > When I try to telnet to one of my sun servers, this error appears: > SunOS 5.8 > Connection closed by foreign host. > And then I'm returned to the prompt. Any ideas what the problem is?
I've had this happen when the system ran out of file descriptors... from memory, fd_lim_cur and/or fd_lim_max, but a quick google would find them.
Is the system otherwise behaving? Can you log in directly to the console? The only other time I saw this was when I helped someone out who had changed the ownership of /dev to someone other than root (actually did a chown -R from $VAR/*, without first setting $VAR, as root.) From that day on, he's been known as chown-boy ;)
So...how's it behaving otherwise? Is it doing what it's supposed to, or just generally b0rken?
> When I try to telnet to one of my sun servers, this error appears:
> # telnet localhost > Trying 127.0.0.1... > Connected to localhost. > Escape character is '^]'.
> SunOS 5.8
> Connection closed by foreign host.
> And then I'm returned to the prompt. Any ideas what the problem is?
Perhaps the system is using TCP Wrappers.
> Thanks in advance,
No problem.
Hope this helps, Don
-- *************************** You a bounty hunter? * Rev. Don McDonald, SCSA * Man's gotta earn a living. * Baltimore, MD * Dying ain't much of a living, boy. *************************** "Outlaw Josey Wales"
> When I try to telnet to one of my sun servers, this error appears:
> # telnet localhost > Trying 127.0.0.1... > Connected to localhost. > Escape character is '^]'.
> SunOS 5.8
> Connection closed by foreign host.
> And then I'm returned to the prompt. Any ideas what the problem is?
> Thanks in advance, > AG
Any number of things... the one I'm think of is that you've got tcpwrappers installed and have not opened up telnet in the allow file for localhost access.
For example, someone has denied ALL, but not allowed anything to come in.
> When I try to telnet to one of my sun servers, this error appears:
> # telnet localhost > Trying 127.0.0.1... > Connected to localhost. > Escape character is '^]'.
> SunOS 5.8
> Connection closed by foreign host.
> And then I'm returned to the prompt. Any ideas what the problem is?
> Thanks in advance, > AG
> -- > -- > |"The physicist's greatest tool is his wastebasket." - Albert Einstein. > |"When did ignorance become a point of view ? - Scott Adams. > |"The collective IQ of a location is inversely proportional to the number of > people gathered."
I had the same problem yesterday with my Linux box. The problem was that I didn´t install my telnet server. I think Solaris uses the in.telnetd too. (look into inetd.conf) check if in.telnetd is at its place
>> When I try to telnet to one of my sun servers, this error appears:
>> # telnet localhost >> Trying 127.0.0.1... >> Connected to localhost. >> Escape character is '^]'.
>> SunOS 5.8
>> Connection closed by foreign host. ... >I had the same problem yesterday with my Linux box. >The problem was that I didn´t install my telnet server. I think Solaris uses >the in.telnetd too. (look into inetd.conf) >check if in.telnetd is at its place
If he didn't install the telnet server, how would he get the "SunOS 5.8" greeting message, since that's sent by the telnet server?
-- Barry Margolin, bar...@genuity.net Genuity, Woburn, MA *** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups. Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.
In comp.unix.admin Dietrich Kanz <dietrich.k...@mnet-online.de> wrote:
> I had the same problem yesterday with my Linux box. > The problem was that I didn´t install my telnet server. I think Solaris uses > the in.telnetd too. (look into inetd.conf) > check if in.telnetd is at its place
Another good point. Maybe the original poster would be so kind as to come back and give us more information, like when did it last work, if anyone else has root on the box, how he normally gets in, that sort of thing.
Between us, we could guess for a good long time, but without more information from the OP, or feedback that he's even here, there's not alot of point to it.
> > # telnet localhost > > Trying 127.0.0.1... > > Connected to localhost. > > Escape character is '^]'.
> > SunOS 5.8
> > Connection closed by foreign host.
> Any number of things... the one I'm think of is that > you've got tcpwrappers installed and have not opened > up telnet in the allow file for localhost access.
If it was a tcpwrappers problem the "SunOS" banner would not be displayed.
> When I try to telnet to one of my sun servers, this error appears:
> # telnet localhost > Trying 127.0.0.1... > Connected to localhost. > Escape character is '^]'.
> SunOS 5.8
> Connection closed by foreign host.
> And then I'm returned to the prompt. Any ideas what the problem is?
> Thanks in advance, > AG
> -- > -- > |"The physicist's greatest tool is his wastebasket." - Albert Einstein. > |"When did ignorance become a point of view ? - Scott Adams. > |"The collective IQ of a location is inversely proportional to the number of > people gathered."
> check /dev/default/login to make sure that > #CONSOLE=/dev/console
Das hat damit NIX zu tun! Egal was da drin steht - der login prompt müßte kommen.
-- Dipl. Ing. Andreas Fenner, mailto:Andreas.Fen...@alcatel.de Alcatel SEL AG, TS/EE, Holderäckerstr.10, 70499 Stuttgart, 0711/821-49823 ------------------------------------------------------------------------- Linux is like a Wigwam: no Windows, no Gates, Apache inside
In comp.unix.admin Andreas Fenner <Andreas.Fen...@alcatel.de> wrote:
> wavelet wrote:
>> check /dev/default/login to make sure that >> #CONSOLE=/dev/console
> Das hat damit NIX zu tun! > Egal was da drin steht - der login prompt müßte kommen.
Exactly; that's one reason the original poster has to come back and clarify and/or answer some of the clarifying questions if there's any hope to get a good answer.
The fact that he's getting the SunOS 5.8 identifier does show that telnet is responding on port 23, inetd is firing it up, and so on. Without knowing if this is new behavior which worked previously, or any of the other questions, ...
> > check /dev/default/login to make sure that > > #CONSOLE=/dev/console
> Das hat damit NIX zu tun! > Egal was da drin steht - der login prompt müßte kommen.
Oops - sorry, english newsgroup :-)
It does not matter to what CONSOLE is set in this file. In each case there should be a login prompt!
Andreas -- Dipl. Ing. Andreas Fenner, mailto:Andreas.Fen...@alcatel.de Alcatel SEL AG, TS/EE, Holderäckerstr.10, 70499 Stuttgart, 0711/821-49823 ------------------------------------------------------------------------- Linux is like a Wigwam: no Windows, no Gates, Apache inside
daveh...@spamcop.net writes: >In comp.unix.admin killahertz <killahe...@world-domination.net> wrote: >> Hi All, >> When I try to telnet to one of my sun servers, this error appears: >> SunOS 5.8 >> Connection closed by foreign host. >> And then I'm returned to the prompt. Any ideas what the problem is? >I've had this happen when the system ran out of file descriptors... >from memory, fd_lim_cur and/or fd_lim_max, but a quick google would >find them.
The system will not run out of file decriptors; the limits you mention are per-process; there are no system wide limits.
The immediate closure can point to: - missing/damaged in.telnetd - TCP wrappers refusing connection
Also, there are a few "installable backdoors" out there that have not been properly debugged that can cause all sorts of funny symptoms.
Casper -- Expressed in this posting are my opinions. They are in no way related to opinions held by my employer, Sun Microsystems. Statements on Sun products included here are not gospel and may be fiction rather than truth.
> >> When I try to telnet to one of my sun servers, this error appears:
> >> # telnet localhost > >> Trying 127.0.0.1... > >> Connected to localhost. > >> Escape character is '^]'.
> >> SunOS 5.8
> >> Connection closed by foreign host. > ... > >I had the same problem yesterday with my Linux box. > >The problem was that I didn´t install my telnet server. I think Solaris uses > >the in.telnetd too. (look into inetd.conf) > >check if in.telnetd is at its place
> If he didn't install the telnet server, how would he get the "SunOS 5.8" > greeting message, since that's sent by the telnet server?
Well try it. I got the greeting message too!!! And then it threw me out. After I installed the telnet server it worked. But as I said, that was a Linux box and not Solaris.
> -- > Barry Margolin, bar...@genuity.net > Genuity, Woburn, MA > *** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups. > Please DON'T copy followups to me -- I'll assume it wasn't posted to the
>> If he didn't install the telnet server, how would he get the "SunOS 5.8" >> greeting message, since that's sent by the telnet server? > Well try it. I got the greeting message too!!! And then it threw me out. > After I installed the telnet server it worked.
Hm, so inetd is popping up that message? That's ... unexpected... I believe you; don't get me wrong, but I'm surprised.
> But as I said, that was a Linux box and not Solaris.
Cool. Didn't know that. Something to add to my "things to understand" list.
Dietrich Kanz <dietrich.k...@mnet-online.de> wrote: ><daveh...@spamcop.net> wrote in message >news:aohko7$mikiu$5@ID-134476.news.dfncis.de... >> In comp.unix.admin Dietrich Kanz <dietrich.k...@mnet-online.de> wrote:
>> >> If he didn't install the telnet server, how would he get the "SunOS >5.8" >> >> greeting message, since that's sent by the telnet server?
>> > Well try it. I got the greeting message too!!! And then it threw me out. >> > After I installed the telnet server it worked.
>> Hm, so inetd is popping up that message? That's ... unexpected... >> I believe you; don't get me wrong, but I'm surprised.
>> > But as I said, that was a Linux box and not Solaris.
>> Cool. Didn't know that. Something to add to my "things to understand" >> list.
>> Dave
>Seems so, >but Linux is a bit more descriptive here. Thats the complete message:
>voodoo# telnet localhost >Trying ::1... >telnet: connect to address ::1: Connection refused >Trying 127.0.0.1... >Connected to localhost. >Escape character is '^]'. >Connection closed by foreign host
>When /usr/sbin/in.telnetd is at its place it works.
I don't see a system greeting message in that output. The "Connected to" message means that inetd is listening on the port. The "SunOS 5.8" message on Solaris comes *later* than that, and it's produced by in.telnetd after inetd successfully starts it.
If the connection closes after that message, it means that some resource that in.telnetd needs is exhausted; perhaps it has run out of ptys (except I thought that it prints a more descriptive message in that case).
-- Barry Margolin, bar...@genuity.net Genuity, Woburn, MA *** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups. Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.
In comp.unix.admin Barry Margolin <bar...@genuity.net> wrote:
> In article <aohl6j$c8...@svr8.m-online.net>, > If the connection closes after that message, it means that some resource > that in.telnetd needs is exhausted; perhaps it has run out of ptys (except > I thought that it prints a more descriptive message in that case).
I don't recall about that, and I'm not keen on reproducing it for this, but I know that if it can't spawn any more processes, it'll just fail as the OP described. BTDT.
I had a similar problem a couple of years ago an a Sun 2.5.x box.... the problem had to do with a bunch of resources (I forget which ones) getting maxed out. I believe there were *many* zombies on the box... but it was a while back and my memory is gone. Also, we had about 15 users concurently pounding on the box each day.
A reboot of the box solved the problem.
Anyway... if you are getting the greeting message, this indicates that the Login shell is starting up. I believe Telnet isn't the issue, rather it has something to do with login.
In article <g_Zq9.39579$vX.9...@news04.bloor.is.net.cable.rogers.com>,
Joel Atkin <jat...@naturaldata.com> wrote: >Anyway... if you are getting the greeting message, this indicates that the >Login shell is starting up. I believe Telnet isn't the issue, rather it has >something to do with login.
I don't think you really mean "login shell" -- that's the shell process that runs *after* you login. So I think you mean the login process.
But if the login process were starting up, he'd be getting the "login:" prompt, which he didn't get. He's just getting the "SunOS 5.8" greeting message, which I think is sent by in.telnetd before it runs "login".
-- Barry Margolin, bar...@genuity.net Genuity, Woburn, MA *** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups. Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.
>>>>When I try to telnet to one of my sun servers, this error appears:
>>>># telnet localhost >>>>Trying 127.0.0.1... >>>>Connected to localhost. >>>>Escape character is '^]'.
>>>>SunOS 5.8
>>>>Connection closed by foreign host.
>>...
>>>I had the same problem yesterday with my Linux box. >>>The problem was that I didn´t install my telnet server. I think Solaris
> uses
>>>the in.telnetd too. (look into inetd.conf) >>>check if in.telnetd is at its place
>>If he didn't install the telnet server, how would he get the "SunOS 5.8" >>greeting message, since that's sent by the telnet server?
> Well try it. I got the greeting message too!!! And then it threw me out. > After I installed the telnet server it worked. > But as I said, that was a Linux box and not Solaris.
So you haven't tried it on a UNIX system.
Hope this helps, Don
-- *************************** You a bounty hunter? * Rev. Don McDonald, SCSA * Man's gotta earn a living. * Baltimore, MD * Dying ain't much of a living, boy. *************************** "Outlaw Josey Wales"
Barry Margolin wrote: > But if the login process were starting up, he'd be getting the "login:" > prompt, which he didn't get. He's just getting the "SunOS 5.8" greeting > message, which I think is sent by in.telnetd before it runs "login".
correct! The banner is displayed by the in.telnetd.
> The banner printed by in.telnetd is configurable. The > default is (more or less) equivalent to "`uname -sr`" and > will be used if no banner is set in /etc/default/telnetd. > To set the banner, add a line of the form
> BANNER="..."
> to /etc/default/telnetd. Nonempty banner strings are fed to > shells for evaluation. The default banner may be obtained by
> and no banner will be printed if /etc/default/telnetd con- > tains
> BANNER=""
-- Dipl. Ing. Andreas Fenner, mailto:Andreas.Fen...@alcatel.de Alcatel SEL AG, TS/EE, Holderäckerstr.10, 70499 Stuttgart, 0711/821-49823 ------------------------------------------------------------------------- Linux is like a Wigwam: no Windows, no Gates, Apache inside
