Canot ping from WHM server

postcd

• July 09, 2014 13:46

Hello, when i do ping gmail.com ping: unknown host gmail.com root@host1 [~]# ping cpanel.net ping: unknown host cpanel.net when sending emails it says like: "Previous Message: ****: == *@sina.com R=lookuphost defer (-1): host lookup did not complete" the /etc/resolv.conf contains nameserver 8.8.8.8 nameserver 8.8.4.4 please what to do?

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  postcd

  • July 09, 2014 20:05

  [COLOR="#008000">SOLVED The google nameservers IPs (mentioned above) somehow went into iptables to be blocked, not sure how...... but after removed their IPs from iptables, ping worked and mails went out. so im curious how to add allow rule for my nameserver ips into iptables which will have priority over any block rules added in future.

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  iserversupport

  • July 10, 2014 23:20

  Do you have CSF installed ? With that you can allow IP in a single command csf -a 8.8.8.8

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  triantech

  • July 11, 2014 13:13

  Using iptables, # iptables -I INPUT -s 8.8.8.8 -j ACCEPT # iptables -I INPUT -s 4.4.4.4 -j ACCEPT # service iptables save # service iptables restart

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  cPanelMichael

  • July 16, 2014 12:36

  Hello :) Yes, I suggest using CSF to allow the IP address unless you want the responsibility of managing custom iptables firewall rules. Thank you.

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