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Thread: Fail Starting ISC DHCP IPv4 Server

  1. #1
    Join Date
    Feb 2014
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    8

    Fail Starting ISC DHCP IPv4 Server

    Hello!

    As seems to be quite common, I am brand-new to Linux and Ubuntu and have a question. (Yes, I am one of the Windows users who has the Wndows mentality, and I'm really trying to learn how to get rid of it!).

    I just installed Ubuntu the other day, then I installed the Firestarter firewall, and Comodo Anti-Virus. Thanks to this forum was able to get my wireless driver installed on my Inspiron 1501. Initially I had to connect to the internet using my ethernet cable, but now my wireless works perfectly. Last night I was checking to make sure my firewall and anti-virus were really installed and running, and I tried to run a Comodo scan last night. Shortly after the scan started, I got a black screen with lots of stuff written on it, and I noticed one thing that said:

    Fail *Starting ISC DHCP IPv4 Server.

    I tried again this morning and got the same error. I'm wondering if this is because in my Firestarter firewall I only had the option of one internet connection type, and it was set as default to the ethernet, and I chose wireless, since that is how I will always be connecting to the internet.

    Is there something I can do to fix this, or do I need to remove something? I am good at following directions, so if anyone can tell me what to do, step by step, I should be able to follow along and fix the errors.

    I hope this all made sense and I am hoping someone will be able to help me. Thank you in advance to everyone for reading this and your assistance!!

  2. #2
    Join Date
    Nov 2008
    Location
    Metro Boston
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    10,094
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: Fail Starting ISC DHCP IPv4 Server

    Are you intending to use this machine as a DHCP server for a local network? Why do you need to run dhcpd?

    You say you will be connecting wirelessly to the Internet. The router to which you connect already has a DHCP server that gives an address to wlan0, the wifi interface. Are you intending to connect a local network to the machine's Ethernet port? Why not just connect the network to the LAN side of the router?

    If you tell us what you're trying to accomplish, it will be easier to help.
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

    Blog · Linode System Administration Guides · Android Apps for Ubuntu Users

  3. #3
    Join Date
    Feb 2014
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    8

    Re: Fail Starting ISC DHCP IPv4 Server

    Thanks for your quick response. No, I do not intend to use the machine as a DHCP server. I honestly didn't even know what that was (until I did a google search), so forgive my ignorance! Sorry!

    Hopefully I can clarify what I am trying to do. I will be connecting my laptop wirelessly to the Internet. I don't want to connect using an ethernet cable, I'm not connecting any other computers or anything like that. I just want to connect my laptop using wifi. I'm just your average person using the internet for typical things...nothing fancy.

    What I am trying to do is install a firewall and an anti-virus, just to make sure I keep everything safe. I know there are varying opinions on whether or not firewalls and anti-virus are really needed, but I'm on the paranoid side and would prefer to have the extra security measures in place. I have installed the Firestarter Firewall and Comodo Anti-Virus for Linux, and when I try to run the Comodo Anti-Virus scan, that's when the problem arises. I am wondering if I have some setting configured incorrectly, based upon your response to my initial message.

    Hopefully that gives you a better understanding of what I'm trying to accomplish. Again, any additional assistance you can provide is sincerely appreciated. Thank you for your help!

  4. #4
    Join Date
    Feb 2014
    Beans
    8

    Re: Fail Starting ISC DHCP IPv4 Server

    I'm not sure if this helps or not. When I try to do a scan with the anti-virus, after a minute or so, the computer freezes up and there's a bunch of text on the page. I was able to write down part of the code that comes up on the screen when the computer freezes up. It says:

    12161.903937 ---------------------cut here------------------------------------
    12161.904051 kernel BUG at /build/buildd/linux-3.2.0/fs/dcache.c:474!
    12161.904170 invalid opcode: 0000 [#1]SMP

    and then there's a whole long list of modules. I'm not sure if this information is helpful, but I thought it might be. I'm going to look around the forum and see if I can find anything that talks about a kernel BUG, to see if that is what the problem is, and to see if I can find the way to fix it.

    Any thoughts, input, etc. is greatly appreciated.

    Thanks again!!!

  5. #5
    Join Date
    Jan 2008
    Location
    Bay Area, CA/Kanagawa, JP
    Beans
    248
    Distro
    Xubuntu 13.10 Saucy Salamander

    Re: Fail Starting ISC DHCP IPv4 Server

    Seems like an issue with comodo:
    https://bugs.launchpad.net/ubuntu/+s...ux/+bug/952398
    http://forums.comodo.com/comodo-anti...-t95837.0.html

    Can you try upgrading the kernel? sudo apt-get update && sudo apt-get dist-upgrade, then reboot and try again?

  6. #6
    Join Date
    Feb 2014
    Beans
    8

    Re: Fail Starting ISC DHCP IPv4 Server

    I was wondering if it was an issue with Comodo as well. I did a little looking around, and others have had a similar issue. I will upgrade the kernel and reboot. I have a few things to do and won't be able to continue working on this for about 2 hours, but I will report back as soon as it's done. Thank you so very much for your response. I'll post with my results as soon as I have them.

  7. #7
    Join Date
    Feb 2014
    Beans
    8

    Re: Fail Starting ISC DHCP IPv4 Server

    Ok, I'm back. I did the upgrade as you suggested - thank you for writing the exact directions on what to type in!! - and then I tried to run the anti-virus scan and the system still crashed. I am going to un-install Comodo Anti-Virus and try installing ClamAV since that seems to be the most popular. I'll run the scan with Clam and report back. Thanks again!!!

  8. #8
    Join Date
    Feb 2014
    Beans
    8

    Re: Fail Starting ISC DHCP IPv4 Server

    I just installed ClamAV and did a scan, and it worked fine. But, I think I might prefer using AVG Anti-virus since I'm more familiar with it, so tomorrow I may un-install Clam and try installing AVG. But it seems that the computer crashing has stopped, so I guess it did have something to do with Comodo. Thank you so much for your help!

  9. #9
    Join Date
    Nov 2008
    Location
    Metro Boston
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    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: Fail Starting ISC DHCP IPv4 Server

    Remember that scanning with an antivirus program only makes sense if you have a Windows partition on the machine. There are few pure-Linux viruses and most are just proofs-of-concept. I guess AV might detect browser attacks that leave little javascript bits behind, but I've only ever had that problem once, when the NY Times site sent me a copy of the Antivirus 2010 script. When the script showed me a window claiming I had infected DLLs on a pure-LInux system, I laughed out loud.
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

    Blog · Linode System Administration Guides · Android Apps for Ubuntu Users

  10. #10
    Join Date
    Feb 2014
    Beans
    8

    Re: Fail Starting ISC DHCP IPv4 Server

    Oh, I did not realize that! Being new to Ubuntu and Linux, I find I have a LOT to learn! Too funny about the Times sending you a copy and getting a virus notification!! I'm sure that's a story that doesn't get old!

    So, is there any anti-virus that I should run, or is it really unnecessary? And, if you don't mind me asking, what about a firewall? I'm so used to the Windows mentality of having to keep your system secured and guarding it with your life, that I feel like not having a firewall and anti-virus is like leaving the front door to my house wide open with a bucket of cash sitting on the table!!

    Thanks again for your response.

    And, do you think I should mark this thread as Solved? I'm not sure if technically it is solved, but since I removed the problem application, I havent had any other issues.

    Thanks!!

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