Problems checking external host

[ReynierPM]

James Pratt wrote:
> 
> http://www.zdnetasia.com/techguide/opensource/0,39044899,62052006,00.htm
> some
> create
> 
> No problem - As root, just run:
> 
> su - nagios -c "ssh nagios at remotebox.com" (replace your target hostname
> here, or use IP)
> 
> let it connect and accept the key, then do the same on the target box in
> reverse, so that both sides have the key in ~/.ssh/authorized_keys
> files.
> 

Hi:
It's me again trying to configure check_by_ssh but without success. See, 
  I follow this tutorial[1] but when I've done can't login to remote 
server from Nagios server. Let me explain a bit what I do:

1) Login into my Nagios server as "root" not as "nagios" user
2) Run this commands:
  ssh-keygen -t rsa1 (for SSH1, I think I don't need this but just run 
for precaution)
  ssh-keygen -t dsa
  ssh-keygen -t rsa
3) Copy the generated files to the remote server
  scp ~/.ssh/*.pub nagios at 10.128.50.11:/home/nagios/
4) Run this others commands:
cat identity.pub >>~/.ssh/authorized_keys
cat id_dsa.pub >>~/.ssh/authorized_keys
cat id_rsa.pub >>~/.ssh/authorized_keys
rm identity.pub id_dsa.pub id_rsa.pub

Now when I try to login from Nagios server to the remote server 
(10.128.50.11) I always need to enter the password. I try as "root" and 
also as "nagios" (meaning ssh root at 10.128.50.11, ssh 
nagios at 10.128.50.11). Why?

The curiosity came to me and I check the file authorized_keys at remote 
host and have this:

2048 35 
31537320408745229838365562405624946802370792096499059223774165383570113281161048240756249546198805679184056103143919830145818642104082292170996730416929422264174662938941716685989426016074582046007764918772604041829437044357969148541210017569485061724990330392006573284601283454700329897647888326315719461278230886781115132496222294195579706117375955677922834002228681170251111807857141282704805088831501704787050993949809146632808041890108774648791697895838722205506992426654008098461046497741222563633988038536169891094257004960432390755965669333326650500537312297715834727417885056386391177047203249702515327707761 
root at monitoring
ssh-dss 
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 
root at monitoring
ssh-rsa 
AAAAB3NzaC1yc2EAAAABIwAAAQEAvIvPpR2k3br05Yel6LHdziEp6uLx53gsTiSPko9tCuj26dxwJUg1Pt1LrNKObApdA0QWoLVXUmZx/MFicCvqND9Mj93nCSwZ9fN8MRlea5DNDpJORE2NPjmV5IlxX9S3qLDhkp1bXrqLS556sipxXigDZlvCJ/nHa4ZCdFRek2pT7vNVNA8E/wxu38zCnCDLFmmq73r+Sf+8Ud/whBBWWAIrQgGcP1oQ1MTo+rMYJSudof4CWAS9IWV3TI1yLg9EJK0CpzHVIYReo0QZzgin8op70/mx09OQsDCxZD/Ht9D3NTFxiTByRgtU//SzCJyLZigyeJODdEDr3PiK7+f4Nw== 
root at monitoring

As you can see all have "root at monitoring" at the end. What is the 
problem? Does this have anything to do?

[1] 
http://hocuspokus.net/2008/01/ssh-shared-key-setup-ssh-logins-without-passwords/comment-page-1
-- 
Cheers and thanks in advance
ReynierPM

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