Ping problem - please explain

[jaro74]

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.

[cPanelDon]

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.

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?

[jaro74]

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'

[cPanelDon]

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'

When the problem occurs, can you still ping the IP address directly, and access HTTP using the IP address?

Example URL:

http://77.235.51.113/

Example Ping command:

# 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):

# 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):

# 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.

[jaro74]

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 ?

[madaboutlinux]

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.

[jaro74]

Thanx for yours sugestions

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

wi.swf

regards