Question

A remote host refused an attempted connect operation.

Asked by: slcoit

We are in the process of setting up a Dell Poweredge 2850 with Red hat Enterprise Linux 3 to be our Disaster Recovery server.
Our production data is on an IBM 7026-H80 running AIX 4.3.3.
To move all the data and software from the AIX to the Linux we would like to use the rcp command.
When I run: [root@LINUX Box]# rcp test.txt AIXserver:/home
I get the following:
     Trying krb4 rcp...
     krb_sendauth failed: You have no tickets cached
     trying normal rcp (/usr/bin/rcp)
The file copied successfully to the AIXserver.

When I run: [root@AIXserver]# rcp test.txt LINUX Box:/home
I get this message:
     LINUX Box: A remote host refused an attempted connect operation.

Questions are:
When I try from Linux to AIX I get 'krb_sendauth failed: You have no tickets cached'.
and when I try from AIX I get ' remote host refused an attempted connect operation.'.
How do I fix these errors?
I have created on both platforms: /.rhosts, /etc/hosts.config
I have defined both servers in both /etc/hosts.

Your assistance will be greatly appreciated.

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2006-02-16 at 08:33:21ID21739549
Tags

host

,

refused

,

remote

,

connect

,

attempted

Topic

Linux Network Security

Participating Experts
4
Points
250
Comments
8

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. disaster recovery
    In Windows platform e.g. win2000 server, NT server many backup software e.g. arcserve has option to provide disaster backup and recovery but how about how to do disaster backup and recovery on unix system e.g. Linux, Sun Solaris I found most backup software running on window...
  2. remote disaster recovery
    I am using ARCserve 2000 backup software w/disaster recovery option enabled, installed on a win2k server. I want to make a disaster backup from a remote WinNT4 workstation. How do I .... ?
  3. AIX --  /usr 100%
    Guys, I am running AIX 5.2.0.4. This morning i see that /usr stands at 100% usage. I am not sure what all stuff i can look for removing. Please suggest. thanks, Max.
  4. /usr is full 90% how do I clean up unnecessary files fro…
    How do I clean up unnecessary files from /usr filesystem. It is now 90% full on AIX
  5. AIX commands
    Is there a command that lists all of the commands on an AIX system? Is there a way to list the commands with their descriptions? Thanks for your help!

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: aashishkuntePosted on 2006-02-16 at 11:45:03ID: 15974419

Dear slcoit,

  Have you tried rlogin from each machine to other ? I think

>>>> When I try from Linux to AIX I get 'krb_sendauth failed: You have no tickets cached'.

  your rcp protocal is using krb i.e kerbarose. Please check your Rlogin shell and auth parameters in  /.rhosts

 >>>>> from AIX I get ' remote host refused an attempted connect operation.'.
   The port is not open or firewall present at othere end which is blocking connection

Please turn off iptables in Linux. and first try rlogin wheather it is possibel !

Regards,
Aashish
 

 

by: ahoffmannPosted on 2006-02-16 at 14:39:10ID: 15976079

is their a special reason why you want to use rsh/rcp?
I'd suggest that you use ssh/scp instead.

 

by: dpiniellaPosted on 2006-02-17 at 22:13:48ID: 15987337

from aix to linux you're getting the rsh/rlogin because r* services are defaulted to off on most linux distros for being insecure (cleartext, just like telnet). ahoffman's suggestion to use ssh/scp instead of rsh/rcp is an excellent idea. See http://unix.ittoolbox.com/documents/popular-q-and-a/installing-ssh-on-aix-2475 for how to install openssh on AIX if it is not alreayd installed (first link there is http://unix.ittoolbox.com/groups/technical-functional/ibm-aix-l/212785 which will be what you're looking for I think).

 

by: ahoffmannPosted on 2006-02-18 at 15:32:49ID: 15991284

IIRC AIX uses remsh as remote shell (all others use rsh), while rsh is restricted shell
Not sure if this matters in your case.

 

by: robertfwoodsPosted on 2006-03-09 at 10:57:36ID: 16147549

Timely topic.
I am experiencing the same issue migrating from Aix 4.3.3 to Fedora Core 4.
Also at another client I will be migrating from AIX 5.1 to Enterprise Linux AS 4.
At a third client we will be migrating from DG (unknown OS version) to AIX 5.3.

The problem is some of these older machines do not have ssh / ssl installed and in some cases are so ancient that it is difficult to configure ssh and ssl on them. The point is to migrate off them as quickly as possible. Therefore, running scp or ssh from the older machine to the new Linux boxes is not an option. You could configure the new machine to allow these commands to work; my solution is to pull the data from the old machine to the new one. In that manner, you do not compromise security on the new machine.

Which brings us back to the original question.

Bottom line is the command was successful and accomplished the copy. It was just squawking about your lack of attention to security issues. I have tried several things to eliminate these messages and have not been successful.

I have observed several such commands in operation recently and they seem to attempt connections from the most secure to the least and report failures as they descend.

Not to worry, the file was copied.

If you are planning to move entire directory structures, it is possible to migrate them without making an interium copy. The trick is to create a tar image on the source machine and pipe it to a tar command on the target machine.

The following worked on my configuration. The pontiac server is running Linux Fedora Core 4 and the chevrolet server is running AIX 4.3.3.

[root@pontiac junk]# pwd
/brc/junk
[root@pontiac junk]# rsh chevrolet '(cd /brc/sg; tar cf - try4)'|tar xvf -
Trying krb4 rsh...
krb_sendauth failed: You have no tickets cached
trying normal rsh (/usr/bin/rsh)
try4/
try4/f4.3
try4/f4.4
try4/f4.1.Z
try4/f4.2.Z
try4/f4.5
[root@pontiac junk]# ls -lR
.:
total 4
drwxr-sr-x  2 root sys 4096 Mar  9 06:44 try4

./try4:
total 1072
-rw-r--r--  1 root sys 1085668 Mar  9 06:34 f4.1.Z
-rw-r--r--  1 root sys    2247 Mar  9 06:36 f4.2.Z
-rw-r--r--  1 root sys       0 Mar  9 06:40 f4.3
-rw-r--r--  1 root sys       0 Mar  9 06:41 f4.4
-rw-r--r--  1 root sys       0 Mar  9 06:44 f4.5
[root@pontiac junk]#

I would change the xvf to xf on the rsh command to minimize screen output.

The above will work fine. However, I have experienced some issues you should watch for.

1)      The machine must both be configured to process files larger than 2GB if that applies.
2)      If there is a network switch involved, the communication link can cause collisions if the network interface is set to auto negotiate. I have had to set them to 100 or 1000 and turn off auto negotiate on both the switch and the AIX interface. The more data you are pumping, a bigger the pipe will make a difference.

Good Luck

 

by: robertfwoodsPosted on 2006-03-09 at 12:30:43ID: 16148466

BTW the return code from the rcp is set properly after the command.
0 - for success
1 - for failure.

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...