Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

changing subnetmask on all servers

Discussion in 'General Discussion' started by CoolMike, Jul 12, 2005.

  1. CoolMike

    CoolMike Well-Known Member

    Joined:
    Sep 6, 2001
    Messages:
    307
    Likes Received:
    0
    Trophy Points:
    316
    Hi

    I have to change the subnet mask on all my cpanel servers in a few days. I'm wondering, is it enough if I change the file "/etc/sysconfig/network-scripts/ifcfg-eth0"? Or is there anything else needed? After I made the change there, do I need to restart a service?

    I use Centos 3.5.

    Thanks
    Michael
     
    #1 CoolMike, Jul 12, 2005
  2. CoolMike

    CoolMike Well-Known Member

    Joined:
    Sep 6, 2001
    Messages:
    307
    Likes Received:
    0
    Trophy Points:
    316
    I just realized in this file I have only the main IP adress, what about the second IP which I have configured on this servers? I did expect that there will be also a file ifcfg-eth0:1, but I did not find it.

    Michael
     
    #2 CoolMike, Jul 12, 2005
  3. chirpy

    chirpy Well-Known Member

    Joined:
    Jun 15, 2002
    Messages:
    13,460
    Likes Received:
    21
    Trophy Points:
    463
    Location:
    Go on, have a guess
    Run ifconfig to check how your IP addresses are bound. After making changes you need to down and up the interface. Remotely, this is best done with:

    /etc/init.d/network restart

    But do be aware that this can render the server inaccessible and may require a manual restart of the network from the console. If you have access to the console remotely, do that restart from there. If not, it might be better to simply reboot.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #3 chirpy, Jul 12, 2005
  4. CoolMike

    CoolMike Well-Known Member

    Joined:
    Sep 6, 2001
    Messages:
    307
    Likes Received:
    0
    Trophy Points:
    316
    Hi Chirpy

    ipconfig shows this:

    But I have only a /etc/sysconfig/network-scripts/ifcfg-eth0 file and not a second one for eth0:1.

    Where can I change the subnetmask for the second ip address?

    Thanks
    Michael
     
    #4 CoolMike, Jul 12, 2005
  5. chirpy

    chirpy Well-Known Member

    Joined:
    Jun 15, 2002
    Messages:
    13,460
    Likes Received:
    21
    Trophy Points:
    463
    Location:
    Go on, have a guess
    They're setup by /etc/init.d/ipaliases and take the information from the file /etc/ips which contains, among other things, the network mask information.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #5 chirpy, Jul 13, 2005
  6. CoolMike

    CoolMike Well-Known Member

    Joined:
    Sep 6, 2001
    Messages:
    307
    Likes Received:
    0
    Trophy Points:
    316
    Thanks a lot, this was exactly what I was looking for.

    Michael
     
    #6 CoolMike, Jul 14, 2005
(You must log in or sign up to post here.)
Loading...
Similar Threads - changing subnetmask servers
  1. Deker

    SOLVED Problem changing the primary IP

    Deker, Oct 18, 2018 at 4:56 AM, in forum: Bind/DNS/Nameserver
    Replies:
    6
    Views:
    177
    Infopro
    Oct 18, 2018 at 4:02 PM
  2. Zekeman

    Changing Default Website for Shared IP

    Zekeman, Oct 16, 2018 at 11:16 AM, in forum: General Discussion
    Replies:
    1
    Views:
    38
    cPanelLauren
    Oct 17, 2018 at 6:38 PM
  3. usdcservers

    Changing IMAP ports

    usdcservers, Oct 5, 2018, in forum: E-mail Discussion
    Replies:
    1
    Views:
    51
    cPanelLauren
    Oct 9, 2018
  4. jmtakahashi

    Rewrite Rule changing compression headers?

    jmtakahashi, Sep 23, 2018, in forum: General Discussion
    Replies:
    3
    Views:
    83
    cPanelLauren
    Sep 26, 2018
  5. frdz

    Changing primary domain without touching e-mails

    frdz, Sep 11, 2018, in forum: E-mail Discussion
    Replies:
    1
    Views:
    116
    cPanelLauren
    Sep 14, 2018

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice