Very Computer

by **Raymond Kwo** » Mon, 23 Jul 2001 04:52:52

Our server runs RedHat 6.2, with 2.2.16-3 kernel and ypserv 1.3.9. All Redhat
6.2 workstations connect to the server with no problems. Recently, I installed
RedHat 7.1 on one machine for testing. Ypbind was upgraded to ypbind-1.7-8.
However, ypbind on the 7.1 machine cannot bind to the 6.2 ypserver. There are
no useful debug messages. The server simply does not respond. The 7.1
workstation runs the 2.4.2 kernel. All the configuration files seem reasonable.
I have not been able to find this problem mentioned on the net. Would someone
please give us some suggestions on how to proceed? Many thanks!

by **Dean Thompso** » Tue, 24 Jul 2001 12:02:28

Hi!,

Quote:> Our server runs RedHat 6.2, with 2.2.16-3 kernel and ypserv 1.3.9. All
> Redhat 6.2 workstations connect to the server with no problems. Recently, I
> installed RedHat 7.1 on one machine for testing. Ypbind was upgraded to
> ypbind-1.7-8. However, ypbind on the 7.1 machine cannot bind to the 6.2
> ypserver. There are no useful debug messages. The server simply does not
> respond. The 7.1 workstation runs the 2.4.2 kernel. All the configuration
> files seem reasonable. I have not been able to find this problem mentioned
> on the net. Would someone please give us some suggestions on how to
> proceed? Many thanks!

Check to make sure there are no firewalls (especially the default one that
RH7.1 installs) which are stopping the yp clients from binding to the RH7.1
server. You might like to take a look with the commands: /sbin/ipchains -L -n
to ensure that there are no rules in there stopping you from doing what you
want.

See ya

Dean Thompson

by **Raymond Kwo** » Wed, 25 Jul 2001 22:45:25

Thanks for your response. Actually, our server runs RedHat 6.2, not
7.1, and does not have firewalls installed. It is the client RedHat
7.1 workstation that cannot bind to the ypserver. We have also
installed Mandrake 8.0 on another experimental workstation. The
Mandrake workstation runs the 2.4.3 kernel and has no problem binding
to the ypserver. Upgrading the RedHat 7.1 workstation to the 2.4.3
kernel did not solve the problem. Also, replacing the RedHat ypbind
package with the one from Mandrake did not solve the problem either.

Raymond

> Hi!,

> > Our server runs RedHat 6.2, with 2.2.16-3 kernel and ypserv 1.3.9. All
> > Redhat 6.2 workstations connect to the server with no problems. Recently, I
> > installed RedHat 7.1 on one machine for testing. Ypbind was upgraded to
> > ypbind-1.7-8. However, ypbind on the 7.1 machine cannot bind to the 6.2
> > ypserver. There are no useful debug messages. The server simply does not
> > respond. The 7.1 workstation runs the 2.4.2 kernel. All the configuration
> > files seem reasonable. I have not been able to find this problem mentioned
> > on the net. Would someone please give us some suggestions on how to
> > proceed? Many thanks!

> Check to make sure there are no firewalls (especially the default one that
> RH7.1 installs) which are stopping the yp clients from binding to the RH7.1
> server. You might like to take a look with the commands: /sbin/ipchains -L -n
> to ensure that there are no rules in there stopping you from doing what you
> want.

> See ya

> Dean Thompson

> --
> +____________________________+____________________________________________+

> | Bach. Computing (Hons) | ICQ - 45191180 |
> | PhD Student | Office - <Off-Campus> |
> | School Comp.Sci & Soft.Eng | Phone - +61 3 9903 2787 (Gen. Office) |
> | MONASH (Caulfield Campus) | Fax - +61 3 9903 1077 |
> | Melbourne, Australia | |
> +----------------------------+--------------------------------------------+

by **Raymond Kwo** » Thu, 26 Jul 2001 05:27:11

I have succeeded in getting NIS to work by replacing ypbind-1.7-8 with
ypbind-3.3-29mdk from the Mandrake 8.0 distribution. This ypbind works
with the RedHat 6.2 ypserver, although this is the older ypbind
version. I still have no idea why the more recent (ypbind-mt) versions
do not work. Even the RedHat 6.2
ypbind (ypbind-1.7-0) does not work on the RedHat 7.1 workstation. Can
anyone shed any light on this peculiar problem?

Raymond

> Thanks for your response. Actually, our server runs RedHat 6.2, not
> 7.1, and does not have firewalls installed. It is the client RedHat
> 7.1 workstation that cannot bind to the ypserver. We have also
> installed Mandrake 8.0 on another experimental workstation. The
> Mandrake workstation runs the 2.4.3 kernel and has no problem binding
> to the ypserver. Upgrading the RedHat 7.1 workstation to the 2.4.3
> kernel did not solve the problem. Also, replacing the RedHat ypbind
> package with the one from Mandrake did not solve the problem either.

> Raymond

> > Hi!,

> > > Our server runs RedHat 6.2, with 2.2.16-3 kernel and ypserv 1.3.9. All
> > > Redhat 6.2 workstations connect to the server with no problems. Recently, I
> > > installed RedHat 7.1 on one machine for testing. Ypbind was upgraded to
> > > ypbind-1.7-8. However, ypbind on the 7.1 machine cannot bind to the 6.2
> > > ypserver. There are no useful debug messages. The server simply does not
> > > respond. The 7.1 workstation runs the 2.4.2 kernel. All the configuration
> > > files seem reasonable. I have not been able to find this problem mentioned
> > > on the net. Would someone please give us some suggestions on how to
> > > proceed? Many thanks!

> > Check to make sure there are no firewalls (especially the default one that
> > RH7.1 installs) which are stopping the yp clients from binding to the RH7.1
> > server. You might like to take a look with the commands: /sbin/ipchains -L -n
> > to ensure that there are no rules in there stopping you from doing what you
> > want.

> > See ya

> > Dean Thompson

> > --
> > +____________________________+____________________________________________+

> > | Bach. Computing (Hons) | ICQ - 45191180 |
> > | PhD Student | Office - <Off-Campus> |
> > | School Comp.Sci & Soft.Eng | Phone - +61 3 9903 2787 (Gen. Office) |
> > | MONASH (Caulfield Campus) | Fax - +61 3 9903 1077 |
> > | Melbourne, Australia | |
> +----------------------------+--------------------------------------------+

by **Dean Thompso** » Thu, 26 Jul 2001 10:04:04

Hi!,

Quote:> Thanks for your response. Actually, our server runs RedHat 6.2, not
> 7.1, and does not have firewalls installed. It is the client RedHat
> 7.1 workstation that cannot bind to the ypserver. We have also
> installed Mandrake 8.0 on another experimental workstation. The
> Mandrake workstation runs the 2.4.3 kernel and has no problem binding
> to the ypserver. Upgrading the RedHat 7.1 workstation to the 2.4.3
> kernel did not solve the problem. Also, replacing the RedHat ypbind
> package with the one from Mandrake did not solve the problem either.

Yes, and you did check the Redhat 7.1 client to make sure it had no firewalls
on it, blocking the NIS information from returning back to it ?

See ya

Dean Thompson

by **Raymond Kwo** » Thu, 26 Jul 2001 23:25:17

I have checked to make sure that ipchains and iptables are not
running. I have also downloaded the lastest ypbind-mt-1.8 source and
compiled it on the RedHat 7.1 client. This newest ypbind cannot bind
to the RedHat 6.2 ypserver (version
1.3.9) either, although again it works fine if compiled and run on a
RedHat 6.2 client. I am wondering whether there is an incompatibility
between ypbind-mt-1.7 (or 1.8) on a 2.4.x kernel and ypserv-1.3.9. I
tried to upgrade ypserv to version 1.3.11, but then the RedHat 6.2
clients cannot bind to the ypserver. Any suggestions?

Raymond

> Hi!,

> > Thanks for your response. Actually, our server runs RedHat 6.2, not
> > 7.1, and does not have firewalls installed. It is the client RedHat
> > 7.1 workstation that cannot bind to the ypserver. We have also
> > installed Mandrake 8.0 on another experimental workstation. The
> > Mandrake workstation runs the 2.4.3 kernel and has no problem binding
> > to the ypserver. Upgrading the RedHat 7.1 workstation to the 2.4.3
> > kernel did not solve the problem. Also, replacing the RedHat ypbind
> > package with the one from Mandrake did not solve the problem either.

> Yes, and you did check the Redhat 7.1 client to make sure it had no firewalls
> on it, blocking the NIS information from returning back to it ?

> See ya

> Dean Thompson

> --
> +____________________________+____________________________________________+

> | Bach. Computing (Hons) | ICQ - 45191180 |
> | PhD Student | Office - <Off-Campus> |
> | School Comp.Sci & Soft.Eng | Phone - +61 3 9903 2787 (Gen. Office) |
> | MONASH (Caulfield Campus) | Fax - +61 3 9903 1077 |
> | Melbourne, Australia | |
> +----------------------------+--------------------------------------------+

by **Raymond Kwo** » Fri, 27 Jul 2001 01:33:10

It seems to be a Redhat 7.1 problem. I compiled ypbind-mt-1.8 on a
Mandrake 8.0 machine, replaced ypbind-3.3 with ypbind-mt-1.8, and the
Mandrake machine had no problem binding to the Redhat 6.2 ypserver.

Raymond

> I have checked to make sure that ipchains and iptables are not
> running. I have also downloaded the lastest ypbind-mt-1.8 source and
> compiled it on the RedHat 7.1 client. This newest ypbind cannot bind
> to the RedHat 6.2 ypserver (version
> 1.3.9) either, although again it works fine if compiled and run on a
> RedHat 6.2 client. I am wondering whether there is an incompatibility
> between ypbind-mt-1.7 (or 1.8) on a 2.4.x kernel and ypserv-1.3.9. I
> tried to upgrade ypserv to version 1.3.11, but then the RedHat 6.2
> clients cannot bind to the ypserver. Any suggestions?

> Raymond

> > Hi!,

> > > Thanks for your response. Actually, our server runs RedHat 6.2, not
> > > 7.1, and does not have firewalls installed. It is the client RedHat
> > > 7.1 workstation that cannot bind to the ypserver. We have also
> > > installed Mandrake 8.0 on another experimental workstation. The
> > > Mandrake workstation runs the 2.4.3 kernel and has no problem binding
> > > to the ypserver. Upgrading the RedHat 7.1 workstation to the 2.4.3
> > > kernel did not solve the problem. Also, replacing the RedHat ypbind
> > > package with the one from Mandrake did not solve the problem either.

> > Yes, and you did check the Redhat 7.1 client to make sure it had no firewalls
> > on it, blocking the NIS information from returning back to it ?

> > See ya

> > Dean Thompson

> > --
> > +____________________________+____________________________________________+

> > | Bach. Computing (Hons) | ICQ - 45191180 |
> > | PhD Student | Office - <Off-Campus> |
> > | School Comp.Sci & Soft.Eng | Phone - +61 3 9903 2787 (Gen. Office) |
> > | MONASH (Caulfield Campus) | Fax - +61 3 9903 1077 |
> > | Melbourne, Australia | |
> > +----------------------------+--------------------------------------------+

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