Re: ssh login issue

From: Thomas Koellmann (koellmann_at_gmx.net)
Date: 04/09/05 

Date: Sat, 09 Apr 2005 11:54:29 +0200

Michael Hopkins <michael.hopkins@hopkins-research.com> writes:

> On 27/3/05 2:37 am, in article MPG.1cafd85d7bc6367b9896e1@news.giganews.com,
> "Dan Swartzendruber" <dswartz@druber.com> wrote:
>
>> In article <BE6BCB52.3665D%michael.hopkins@hopkins-research.com>,
>> michael.hopkins@hopkins-research.com says...
>>>
>>>
>>> Hi all
>>>
>>> Anyone know why this is happening when I remotely ssh in to a 5.3p amd64
>>> server called Athlon?
>>>
>>> reverse mapping checking getaddrinfo for athlon failed - POSSIBLE BREAKIN
>>> ATTEMPT!
>>>
>>> It lets me in fine after I supply the password.
>>
>> I believe this is a DNS issue. It's taking the IP address you're
>> connecting from and trying to reverse back to the name and then
>> verifying the forward address. I think this message means that the
>> second step is failing. What I mean is: let's say you're connecting
>> from 10.1.2.3. It does a reverse lookup and comes up with xxx.foo.com.
>> It then does a forward lookup on xxx.foo.com to make sure the IP address
>> matches, but it doesn't (either different or no forward name.) It's
>> basically harmless in your case, I think.
>
> People have suggested a mis-configured named setup, so now that is switched
> off and all hostnames are stored in /etc/hosts. The local network is small
> (3 machines) and all external access is via the combined network router/ADSL
> modem which links everything together. The IP for this router is the only
> entry in /etc/resolv.conf at each end.
>
> I'm not sure if the ssh setup at one or both ends is to blame or if it's
> somewhere in the network setup. Does anyone have any suggestions on where
> to look for the problem or diagnostic tools/logs that will help point to the
> solution?

Just make sure that when

    thk@starbuck:~$ nslookup athlon

gives

    Address: 192.168.250.250

the reverse lookup agrees to that:

    thk@starbuck:~$ nslookup 192.168.250.250
    250.250.168.192.in-addr.arpa name = athlon

Mit schönem Gruß
 - Thomas 

-- 
I had a funny feeling as I saw the house disappear, as though I had written a
poem and it was very good and I had lost it and would never remember it again.
 - Raymond Chandler, The High Window
/* PGP key auf Wunsch per e-mail || PGP key sent on request */

Relevant Pages

  • Re: Rows to Repeat at top
    ... Gord's UDF already set up in it, so all you need to do is to copy the data ... reverse of what is in B1. ... not have access to the Sheet tab to make those changes. ... Preview and click on File | Page Setup and then select the Sheet ...
    (microsoft.public.excel.misc)
  • RE: Spoofed email?
    ... server's are setup properly. ... > Also, I have Sybari Antigen on the Exchange box that also does Reverse DNS, ... >> say whats the ip address for the mail server for yourdomain.com which might ...
    (microsoft.public.exchange2000.general)
  • Re: ssh login issue
    ... Anyone know why this is happening when I remotely ssh in to a 5.3p amd64 ... reverse mapping checking getaddrinfo for athlon failed - POSSIBLE BREAKIN ... People have suggested a mis-configured named setup, ... The local network is small ...
    (comp.unix.bsd.freebsd.misc)
  • Re: [SLE] Apache2 (9.3) and reverse proxy
    ... > I'm trying to setup a reverse proxy, on a setup that looks like this: ... > avialable only via https from the outside. ... your location to be reverse proxied be http://yourproxy/hiddenhost/. ... This would try to by-pass your reverse proxy completely: ...
    (SuSE)