[CentOS] CentOS networking problem
Sir/Madam, This is Aravindh,final year student of Anna University India.We are carrying on research in Cloud Computing and using Open Nebula toolkit for that;for which we need strong network connectivity. The problem i am facing is that i am not able to ping continuously to other nodes in the network. The connectivity is getting lost after 2-3 minutes. we have inspected the connectivity links , switch etc. and found them to be normal. In fact it pings continuously in other OS. Is there any problem in CentOS network connectivity packages? Help needed urgently.. -- Thanks and Regards, Aravindh.R ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS networking problem
Aravindh, Tell us a little bit about your current server hardware, are your NICs showing using ifconfig, what about your gateway sing route. It would be good to know a little bit about your current configuration, including if you are using IPv6. Please elaborate so we can help you further. Lisandro Aravindh Ramaswamy 12/22/10 11:17 PM Sir/Madam, This is Aravindh,final year student of Anna University India.We are carrying on research in Cloud Computing and using Open Nebula toolkit for that;for which we need strong network connectivity. The problem i am facing is that i am not able to ping continuously to other nodes in the network. The connectivity is getting lost after 2-3 minutes. we have inspected the connectivity links , switch etc. and found them to be normal. In fact it pings continuously in other OS. Is there any problem in CentOS network connectivity packages? Help needed urgently.. -- Thanks and Regards, Aravindh.R ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS networking problem
On Wed, Dec 22, 2010 at 11:17 PM, Aravindh Ramaswamy aravindhr...@gmail.com wrote: Sir/Madam, This is Aravindh,final year student of Anna University India.We are carrying on research in Cloud Computing and using Open Nebula toolkit for that;for which we need strong network connectivity. The problem i am facing is that i am not able to ping continuously to other nodes in the network. The connectivity is getting lost after 2-3 minutes. we have inspected the connectivity links , switch etc. and found them to be normal. In fact it pings continuously in other OS. Is there any problem in CentOS network connectivity packages? Help needed urgently.. Pinging continuously can be detected by some firewall as part of denial-of-service attack, which can then block ICMP packages, even block them selectively. How often are you pinging, and from how many other nodes? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS networking problem
Thank you sir for replying.. Given below is my system's status after 'ifconfig'... eth0 Link encap:Ethernet HWaddr 44:87:FC:68:5E:33 inet addr:192.168.100.168 Bcast:192.168.100.255 Mask:255.255.255.0 inet6 addr: fe80::4687:fcff:fe68:5e33/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:26494 errors:0 dropped:0 overruns:0 frame:0 TX packets:10654 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:13696022 (13.0 MiB) TX bytes:2430504 (2.3 MiB) loLink encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:4475 errors:0 dropped:0 overruns:0 frame:0 TX packets:4475 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:7342452 (7.0 MiB) TX bytes:7342452 (7.0 MiB) peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff::feff:/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:49859 errors:0 dropped:0 overruns:0 frame:0 TX packets:10973 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:16486973 (15.7 MiB) TX bytes:2457481 (2.3 MiB) Interrupt:253 Base address:0xc000 vif0.0Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff::feff:/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:10654 errors:0 dropped:0 overruns:0 frame:0 TX packets:26496 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2430504 (2.3 MiB) TX bytes:13696142 (13.0 MiB) virbr0Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:51 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:9090 (8.8 KiB) xenbr0Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:15909 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1364475 (1.3 MiB) TX bytes:0 (0.0 b) On Thu, Dec 23, 2010 at 9:52 AM, Lisandro Grullon lgrul...@citytech.cuny.edu wrote: Aravindh, Tell us a little bit about your current server hardware, are your NICs showing using ifconfig, what about your gateway sing route. It would be good to know a little bit about your current configuration, including if you are using IPv6. Please elaborate so we can help you further. Lisandro Aravindh Ramaswamy 12/22/10 11:17 PM Sir/Madam, This is Aravindh,final year student of Anna University India.We are carrying on research in Cloud Computing and using Open Nebula toolkit for that;for which we need strong network connectivity. The problem i am facing is that i am not able to ping continuously to other nodes in the network. The connectivity is getting lost after 2-3 minutes. we have inspected the connectivity links , switch etc. and found them to be normal. In fact it pings continuously in other OS. Is there any problem in CentOS network connectivity packages? Help needed urgently.. -- Thanks and Regards, Aravindh.R -- Thanks and Regards, Aravindh.R ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] networking problem
On 7/10/10 6:20 PM, Smith Erick Marume-Bahizire wrote: Hello Please I want help in centos server I can ping the gateway or my eth1 ip address but i cant browse from my server could you help me with the codes the codes that will enable network cause i've already configure my iptables and it's showing me that everything is ok. Please help Thank you. Okay, firstly, when asking for help with a new issue, it is best to start a new message rather than reply to a message on an unrelated topic. Otherwise those of us using threaded mail clients (like Mutt or Thunderbird) might overlook the query. Secondly, we need a little detail about your current network configuration and what you have tried. Is it only browsing that is not working, or do other services not work either? Can you send through the output of: route -n cat /etc/resolv.conf Regards, Ben signature.asc Description: OpenPGP digital signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] networking problem
At a guess looks like your DNS is down, or like the Ben suggests no servers in your /etc/resolve.conf Steve On Thu, 7 Oct 2010, Ben McGinnes wrote: On 7/10/10 6:20 PM, Smith Erick Marume-Bahizire wrote: Hello Please I want help in centos server I can ping the gateway or my eth1 ip address but i cant browse from my server could you help me with the codes the codes that will enable network cause i've already configure my iptables and it's showing me that everything is ok. Please help Thank you. Okay, firstly, when asking for help with a new issue, it is best to start a new message rather than reply to a message on an unrelated topic. Otherwise those of us using threaded mail clients (like Mutt or Thunderbird) might overlook the query. Secondly, we need a little detail about your current network configuration and what you have tried. Is it only browsing that is not working, or do other services not work either? Can you send through the output of: route -n cat /etc/resolv.conf Regards, Ben ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
