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Ping problem - please explain

Discussion in 'General Discussion' started by jaro74, Dec 21, 2010.

  1. jaro74

    jaro74 Member

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    Hi

    I have VPS - on hostname: masterhost.domain.com

    On my VPS i have some domains my clients.

    every day I have a problem with http and ping access to all domain on my VPS (~ 10 min)

    but at the same time ping to my hostname and http access http://masterhost.domain.com work fine.

    any CONCLUSION ?

    Please help.
     
  2. cPanelDon

    cPanelDon cPanel Quality Assurance Analyst
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    Twitter:
    While the difficulty is actively occurring, are you able to access the system directly by an IP address? For example, can you still access HTTP via and ping the IP addresses used by the affected domain names?

    What method are you using to ping the system; is it via command-line or using a web-based tool?
     
    #2 cPanelDon, Dec 21, 2010
    Last edited: Dec 21, 2010
  3. jaro74

    jaro74 Member

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    I use windows ping command

    If ping to any domain on my host dont respond, http websites dont work to

    at the same time ping to my hostname and http to my hostname work fine

    i dont understand this :(

    I use cPanel , centos 5.5 x64 my serv IP is '77.235.51.113'
     
    #3 jaro74, Dec 22, 2010
    Last edited: Dec 22, 2010
  4. cPanelDon

    cPanelDon cPanel Quality Assurance Analyst
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    Twitter:
    When the problem occurs, can you still ping the IP address directly, and access HTTP using the IP address?

    Example URL:
    Code:
    http://77.235.51.113/
    Example Ping command:
    Code:
    # ping 77.235.51.113
    Please try the following command as well, and replace "domain.tld" with one of the domain names that are affected; this is to help test if your server is responding to DNS queries (assuming it is used as a name sever for the affected domain):
    Code:
    # nslookup domain.tld. 77.235.51.113
    Does the domain of the hostname use the same DNS/name servers as the affected domain names? That is, are the DNS/name servers the same as seen in a WHOIS query or at the domain registrar?

    Via root CLI/SSH access to the server, please enter the following command to see if BIND/named may be failing (assuming cPanel chkservd is configured to monitor the name server):
    Code:
    # egrep --color "(named \[\[check command:-\]|Restarting named)" /var/log/chkservd.log
    For reference, the Service Manager in WebHost Manager (WHM) can be used to make sure that cPanel chkservd is monitoring the name server; this is accessible via the following menu path: WHM: Main >> Service Configuration >> Service Manager

    Additionally, have you tried contacting the upstream data center or server hosting vendor to see if they are able to resolve the difficulty? As the data center or server host should have direct access to the server their staff would be in the best position to assist with investigating the issue; I would give this avenue a shot to see if the server host may be able to pinpoint the problem.
     
  5. jaro74

    jaro74 Member

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    ok, thnx, i must check this

    My server is located in Amsterdam #easynet dc , i'm from Poland

    I have problem with acces from Poland

    its Output my /etc/resolv.conf
    nameserver 77.235.33.116
    nameserver 77.235.33.38
    nameserver 85.17.96.69

    Maybe i must add to resolv.conf most popular DNS iSP from Poland ?
     
    #5 jaro74, Dec 23, 2010
    Last edited: Dec 23, 2010
  6. madaboutlinux

    madaboutlinux Well-Known Member

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    If ping to your hostname and http works AND at the same time ping and http to the website do not work, it indicates a DNS related issue. Have you checked the DNS report of your websites using some DNS reporting tools. Check your website at: intodns.com

    Also when the websites are inaccessible for you, are they offline for everyone? Have you tried accessing the same websites using a different network?
    Are you able to browse your websites using a proxy website such as https://www.megaproxy.com/freesurf/ when the website is inaccessible from your network?

    These tests will certainly narrow down your investigation and help you to fix the issue.
     
  7. jaro74

    jaro74 Member

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    Thanx for yours sugestions

    I recorded the problem on video, can you check this ?

    wi.swf

    regards
     
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