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Thread: DHCP and network issue on newly installed OpenSuse13.1

  1. #1

    Default DHCP and network issue on newly installed OpenSuse13.1

    Hi All,

    I am very new to OpenSuse.

    I just install openSuse13.1 in my environment and I found the issue. Whenever I am connecting OpeneSuse13.1 machine to network, my DHCP server which is setup on another CentOS machines stops working. It keeps rejecting the every IP. I checked DHCP service on OpeneSuse its not running.

    Also, when I am disconnection OpenSuse machine from network still its pinging to the network machine.

    What configuration do I supposed to do after installing OpenSuse.

    Any help will be much appreciated.

  2. #2
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    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    Quote Originally Posted by yogesh_attarde View Post
    I just install openSuse13.1 in my environment and I found the issue. Whenever I am connecting OpeneSuse13.1 machine to network, my DHCP server which is setup on another CentOS machines stops working. It keeps rejecting the every IP. I checked DHCP service on OpeneSuse its not running.
    Are you using "NetworkManager", or are you configured for "ifup" settings?

    To find out, start Yast --> Network Devices --> Network Settings

    If you are using NetworkManager, then Yast will tell you that and will tell you that you cannot change network settings without first turning of NetworkManager. If you are not using NetworkManager, it will allow you to make changes.

    If you are not using NetworkManager, then I suggest that you try it. While you still have that Yast module open, click the "Global Options" tab, and select "User Controlled with NetworkManager".

    The reason I suggest that, is because NetworkManager uses a different DHCP client, and that might solve your problem. If that works, post back and I'll describe how to swich DHCP clients with "ifup" mode (in case you still prefer to use that).

    Quote Originally Posted by yogesh_attarde View Post
    Also, when I am disconnection OpenSuse machine from network still its pinging to the network machine.
    I'm not sure what you are saying there. Can you give a bit more detail?
    openSUSE Leap 15.3; KDE Plasma 5.18.6;

  3. #3

    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    Quote Originally Posted by nrickert View Post
    Are you using "NetworkManager", or are you configured for "ifup" settings?

    To find out, start Yast --> Network Devices --> Network Settings

    If you are using NetworkManager, then Yast will tell you that and will tell you that you cannot change network settings without first turning of NetworkManager. If you are not using NetworkManager, it will allow you to make changes.

    If you are not using NetworkManager, then I suggest that you try it. While you still have that Yast module open, click the "Global Options" tab, and select "User Controlled with NetworkManager".
    Hey thanks Nrickert, this worked me for network issue.

    No I am facing ssh issue. I am not able to do ssh to this machine. Also could you please let me know the commands through which I can install packages as we install in CentOS using rpm and yum.

  4. #4

    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    Now I am facing ssh issue. I am not able to do ssh to this machine. Also could you please let me know the commands through which I can install packages as we install in CentOS using rpm and yum.

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    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    Quote Originally Posted by yogesh_attarde View Post
    Now I am facing ssh issue. I am not able to do ssh to this machine. Also could you please let me know the commands through which I can install packages as we install in CentOS using rpm and yum.
    Are you familiar with configuring SSH? There used to be a YaST utility for this, but now you must configure it manually. Assuming you know that and have the sshd service configured and running, then maybe it is a firewall issue? You can configure the firewall to allow 'Secure Shell Server'.

    openSUSE has a CLI package manager called zypper.

    Portalypper - openSUSE

    Post again if you need more help.

  6. #6

    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    Quote Originally Posted by deano_ferrari View Post
    Are you familiar with configuring SSH? There used to be a YaST utility for this, but now you must configure it manually. Assuming you know that and have the sshd service configured and running, then maybe it is a firewall issue? You can configure the firewall to allow 'Secure Shell Server'.

    openSUSE has a CLI package manager called zypper.

    Portalypper - openSUSE

    Post again if you need more help.
    The below linked worked for me.

    http://forums.opensuse.org/english/get-technical-help-here/network-internet/403803-ssh-suse-firewall.html

    Now I am trying this machine as LDAP client which uses nss_ldap. Could you please guide to configure it.


    Regards,
    Yogesh

  7. #7

    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    I configured the LDAP client on it but still I am having issue for authentication.

    opensuse:~ # ssh yogesh@192.168.181.36 -v
    OpenSSH_6.2p2, OpenSSL 1.0.1e 11 Feb 2013
    debug1: Reading configuration data /etc/ssh/ssh_config
    debug1: /etc/ssh/ssh_config line 20: Applying options for *
    debug1: Connecting to 192.168.181.36 [192.168.181.36] port 22.
    debug1: Connection established.
    debug1: permanently_set_uid: 0/0
    debug1: identity file /root/.ssh/id_rsa type -1
    debug1: identity file /root/.ssh/id_rsa-cert type -1
    debug1: identity file /root/.ssh/id_dsa type -1
    debug1: identity file /root/.ssh/id_dsa-cert type -1
    debug1: identity file /root/.ssh/id_ecdsa type -1
    debug1: identity file /root/.ssh/id_ecdsa-cert type -1
    debug1: Enabling compatibility mode for protocol 2.0
    debug1: Local version string SSH-2.0-OpenSSH_6.2
    debug1: Remote protocol version 2.0, remote software version OpenSSH_6.2
    debug1: match: OpenSSH_6.2 pat OpenSSH*
    debug1: SSH2_MSG_KEXINIT sent
    debug1: SSH2_MSG_KEXINIT received
    debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none
    debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none
    debug1: sending SSH2_MSG_KEX_ECDH_INIT
    debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
    debug1: Server host key: ECDSA 40:09:1f:8c:c1:a4:d3:4c:ef:56:bb:21:66:d9:d1:94
    debug1: Host '192.168.181.36' is known and matches the ECDSA host key.
    debug1: Found key in /root/.ssh/known_hosts:5
    debug1: ssh_ecdsa_verify: signature correct
    debug1: SSH2_MSG_NEWKEYS sent
    debug1: expecting SSH2_MSG_NEWKEYS
    debug1: SSH2_MSG_NEWKEYS received
    debug1: Roaming not allowed by server
    debug1: SSH2_MSG_SERVICE_REQUEST sent
    debug1: SSH2_MSG_SERVICE_ACCEPT received
    debug1: Authentications that can continue: publickey,keyboard-interactive
    debug1: Next authentication method: publickey
    debug1: Trying private key: /root/.ssh/id_rsa
    debug1: Trying private key: /root/.ssh/id_dsa
    debug1: Trying private key: /root/.ssh/id_ecdsa
    debug1: Next authentication method: keyboard-interactive
    Password:
    debug1: Authentications that can continue: publickey,keyboard-interactive
    Password:
    debug1: Authentications that can continue: publickey,keyboard-interactive
    Password:
    debug1: Authentications that can continue: publickey,keyboard-interactive
    debug1: No more authentication methods to try.
    Permission denied (publickey,keyboard-interactive).
    opensuse:~ #

    Could you please let me know how can I change authentication to LDAP.

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    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    Quote Originally Posted by yogesh_attarde View Post
    Could you please let me know how can I change authentication to LDAP.
    I'm not certain, but I think that once you have the software installed, you need to edit "/etc/nsswitch.conf". Check the man page.
    openSUSE Leap 15.3; KDE Plasma 5.18.6;

  9. #9

    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    I'm not certain, but I think that once you have the software installed, you need to edit "/etc/nsswitch.conf". Check the man page.
    Could you please let me know which software do I need to install for /etc/nsswitch.conf

  10. #10
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    Default Re: DHCP and network issue on newly installed OpenSuse13.1

    Quote Originally Posted by yogesh_attarde View Post
    Could you please let me know which software do I need to install for /etc/nsswitch.conf
    It comes as part of the "glibc" package. It should already be on your system.
    openSUSE Leap 15.3; KDE Plasma 5.18.6;

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