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Re: [CentOS] CentOS networking problem
by Lisandro Grullon 23 Dec '10

23 Dec '10

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

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CentOS networking problem
by Aravindh Ramaswamy 23 Dec '10

23 Dec '10

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

2 1

pam account lockout duration
by bluethundr 23 Dec '10

23 Dec '10

hey list I'm doing a PCI audit for my company. One of the requirements is to specify a lockout duration of 30 minutes after 6 failed login attempts: For a sample of system components, obtain and insp 8.5.14 rd parameters system configuration settings to verify that passwo ed out, it are set to require that once a user account is lock a system remains locked for a minimum of 30 minutes or until administrator resets the account I'm pretty sure this is a pam thing but does anyone know how this can best be achieved? thanks! -- GPG me!! gpg --keyserver pgp.mit.edu --recv-keys F186197B

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compiling a module
by Mag Gam 22 Dec '10

22 Dec '10

I am interested in fscache module. I know where to get the userland tools (http://people.redhat.com/dhowells/fscache/) but I am not sure where to obtain its module. Moreover, I am not sure once I get the source code how I can compile it for Centos 5.2. Has anyone compiled, fscache before? TIA

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Prozilla-gui for centos 5.5 x86_64
by Johan Scheepers 22 Dec '10

22 Dec '10

Good day, Seen when googled that *prozilla* seem to be very good down loader. Googled but could not find a version for my centos. Found one GUI for Fedora 14 x86_64. Would that install on my system without breaking it. or Maybe one for my system that I missed? Some advice would be appreciated. Thanks Johan

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Text Proccessing script - advice?
by Roland RoLaNd 21 Dec '10

21 Dec '10

Hello, I have a log file with the following input: X , ID , Date, Time, Y 01,01368,2010-12-02,09:07:00,Pass 01,01368,2010-12-02,10:54:00,Pass 01,01368,2010-12-02,13:07:04,Pass 01,01368,2010-12-02,18:54:01,Pass 01,01368,2010-12-03,09:02:00,Pass 01,01368,2010-12-03,13:53:00,Pass 01,01368,2010-12-03,16:07:00,Pass My goal is to get the number of times ID has a TIME that's after 09:00:00 each DATE. That would give me two output. one is the number of days ID has been late, and secondly, the day and time this ID has been late . I've started as such: sort -t ',' -k 3,3 -k 4,4 file.log # this will sort the file according to the DATE field as well as the Time fileld. I'm stuck for the last 30 min to find a way to get the first line of each day (logically it'll be the earliest as i've sorted by date/time previously) once i know how to do this, i'll be able to compare time and proceed.. Can any one help ? i looked into sort - u and uniq -f3 though i didnt get far with it..

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CentOS 6
by m.roth＠5-cent.us 21 Dec '10

21 Dec '10

*sigh* I'm sitting here with my manager and the other admin, as they argue as to when CentOS 6 will be out. Anyone have a clue as to when? Are we getting close? mark

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Cloud demographics
by Christopher Chan 21 Dec '10

21 Dec '10

Please turn off troll detectors. Especially those with big automatic hammers. http://thecloudmarket.com/stats#/by_platform_definition Anybody 'extra' bandwidth from the 'Cloud'? Ubuntu installations currently trumps the combined numbers of Centos, Fedora and RHEL (not that using Centos/Fedora/RHEL guarantees secure installations) installations and I just wondered on that aspect. On another note, I wonder how big a change will take place in the demographics when Centos 6 'hits the streets'.

4 4

SATA NCQ and Linux Software RAID
by Matt 20 Dec '10

20 Dec '10

Does SATA Native Command Queueing and Linux software RAID1 play well together or is it better to turn off NCQ when doing software RAID?

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Routing issue between 2 LANs
by Jose Maria Terry Jimenez 20 Dec '10

20 Dec '10

Hello All First, sorry by my poor english, hope you understand me :-) I have a problem, i don't understand or don't know how to solve I need to interconnect 2 networks with different numbers. One is 192.168.236.0/24 the other 192.168.1.0/24. Mainly i need to access services in the 236. from the 1. one. I have a CentOS 5.5 machine with 2 nics each one configured to work in one of the nets. The CentOS also uses a router for Internet access that is 192.168.1.1. 192.168.1.0/24 >-----192.168.1.100--[CentOS Machine]--192.168.236.74 --------< 192.168.236.0/24 So, i enable forwarding in the CentOS box echo '1' > /proc/sys/net/ipv4/ip_forward And in one machine of the 1. network (this is Fedora14) I add the route: route add -net 192.168.236.0 netmask 255.255.255.0 gw 192.168.1.100 dev eth0 Since this moment i can ping or access (ssh/http) another CentOS machine in the 236 network ping 192.168.236.74 PING 192.168.236.74 (192.168.236.74) 56(84) bytes of data. 64 bytes from 192.168.236.74: icmp_req=1 ttl=64 time=0.281 ms But can't access or ping other machines (NOT Linux ones), ie, printers, Win servers, etc... Also tried adding: route add 192.168.1.100 eth0 before the route add -net, but no efect. This fails even if i flush IPTables. In the CentOS box that replies, i did nothing, it 'just' works. Can anyone tell what is happening / help me with this? Something to do missing in the CentOS router that joins the networks? Best,

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