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34758 discussions

ftp problem
by James Pifer 01 Dec '05

01 Dec '05

I have a server that is running iptables. I'm trying to allow vsftpd in and have the following rules. I can connect to it, but when I try to do a listing it says "Entering Passive Mode" but doesn't do anything. Any suggestions? Thanks, James # define it -N FTP_INP -A INPUT -p tcp --syn --sport 1024: --dport 21 -m state --state NEW -j FTP_INP # rules -A FTP_INP -j ACCEPT # go back -A FTP_INP -j RETURN -N FTP_OUT -A OUTPUT -p tcp --sport 1024: --dport 21 -m state --state NEW -j FTP_OUT -A FTP_OUT -j ACCEPT -A FTP_OUT -j RETURN

3 2

p2p?
by Samuel Rochas 01 Dec '05

01 Dec '05

Hello everyone, I have my centos server running just fine with everything I need... except I can't setup no p2p program (amule, bittorrent, etc). Anyone some hint on which program to use and how to make it run? Thanx Samuel --- andinasoft SA - Software y Consulting --- Mariano Aguilera 216 y Almagro - Quito, Ecuador Tel. +593 2 223 5682 ----- Cel. +593 9 946 4046 --------- http://www.andinasoft.com ---------

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why was LILO removed from centOS 4.2?
by Ulrik S. Kofod 01 Dec '05

01 Dec '05

I can't choose LILO as boot loader anymore in the install process? And what is the advantages in GRUP vs. LILO that are so great that LILO has been deleted all together? One big disadvantages when forced to use GRUB is that it is a hassle to make the disks in a RAID1 bootable. https://www.redhat.com/archives/fedora-list/2005-March/msg05935.html and RAID1 seems pretty useless when it is the only bootable disk that fails. can someone come up with a nice one-liner that will make GRUB "global" like LILO is out-of-the-box ? or is ther a parameter you can give? I don't know about you but when one of my disks fails I really don't need too many new check marks to worry about on my to do list. best regards Ulrik

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clicking backspace in centos3 makes ^?
by Robin Mordasiewicz 01 Dec '05

01 Dec '05

While in centos3, using vim and clicking the backspace I see the ^? character instead of it actually deleteing the previous character. In centos4 this was not a problem. I have rad about remapping keys and such, but can someone tell me what the difference between centos4 and centos3 is so I can make the change to make it work on centos3.

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CentOS 4 and Intel Wireless 2200BG (ipw2200)
by Barry Brimer 01 Dec '05

01 Dec '05

I am going to be setting up an Intel 2200bg card this evening. I was wondering if anyone is using this (successfully) with CentOS 4. The directions look straightforward, but please let me know if you had to do anything interesting/undocumented to make it work. I am also wondering if people are using the driver provided with the current CentOS 4 kernel or if people are using the most recent version, and if so are you using the one from ipw2200.sourceforge.net or from intel.com Thanks, Barry

4 3

Too much memory cache being used while moving large file
by Sean O Sullivan 01 Dec '05

01 Dec '05

System : CentOS 4.2 2.6.9-22.0.1.ELsmp System fully up-to-date. 3GB RAM 3ware 9000S card, with Raid5 array. I think that's about all relevant info ... Had file on disk (not array), attempted to mv file to array. Went fine till 2.4GB was copied, then it slowed down to a meg every few minutes. Free memory was ~50MB (Typically is 1.5-2GB), and cache was 2.5GB. Stopped the move, however cache not being cleared out -- and this issue continues to happen - unsure if it was always a problem/known issue, it does however only occur when copying a single file > 2.4GB (I have copied 5+GB of 1+GB files in the past without issue). Also, saw following in dmesg while this was going on: Out of Memory: Killed process 12467 (mysqld). I'll be restarting server later on tonight, which will 'fix' immediate problem, however just curious on thoughts in regards to this. Regards, Sean O Sullivan

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Installed Kernal (default)
by Sam Drinkard 01 Dec '05

01 Dec '05

Is there a description or statement that describes the stock kernal in CentOS, and would give all the various modules it is compiled with? As with BSD, I assume there are things in the kernal that are mandatory, and then there are things that are optional or included so as to catch most everything one could have w/r/t hardware. That being the case, as with FreeBSD, removing those unneded modules would work to reduce the size of the kernal. Aside from rebuilding the kernal to have it contain certain objects needed for something to work, and the loading of different modules at runtime, are there any other benefits to building a custom kernal for any particular set of hardware? By leaving the modules not needed, how much, if any, overhead does this contribute to size? Is this sort of the way things work under Linux, or am I all wet in my thinking? -- Snowman

5 7

A minor beef
by Collins Richey 01 Dec '05

01 Dec '05

CentOS is a really great product, and the package supporters do a bang up job, but the one deficiency I've found is the fact that one can never rely on being able to get updates at any particular time. Whether it's CentOS proper or the Dag additions, something is broke most every time I want to apply updates. I know this is whin[ge]ing, and I certainly don't have a solution to offer. If anyone can offer bucks and/or equipment to improved the software distribution process, your karma would get an enormous boost!!! -- Collins Richey Debugging is twice as hard as writing the code ... If you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. -Brian Kernighan

23 74

Squid updates break tunneling
by Tim Edwards 30 Nov '05

30 Nov '05

This is a question I posted to the RHEL3 mailing list but didn't get a response: "We are currently running squid-2.5.STABLE3-6.3E.9 on one of our RHEL3 proxy servers because updating to the latest (squid-2.5.STABLE3-6.3E.14) seems to break any kind of tunelling, ie. things like instant messaging ports and ssh using proxytunnel (http://proxytunnel.sourceforge.net/) Has anyone else experienced this problem with the Squid updates from RHN?" I was wondering if anyone running Centos has any advice/info on this? -- Tim Edwards

1 0

Yum / Up2date issues and mirror.centos.org
by Johnny Hughes 30 Nov '05

30 Nov '05

There have been some complaints recently concerning this, so I thought an explanation of the setup AND recommendations are in order. First, I want to say that we need more donated servers with fast (at least 100mbit) internet connections. If you are making lots of money using CentOS and are a hosting provider, please consider providing us a donated server so we can better distribute CentOS. Now on to the message :) ----------------------------------------- 1. mirror.centos.org is a rrdns of several machines, so that we can distribute the load for CentOS downloads across several servers. Distributed load is the only way we can serve more than 1 TiB per day for updates. (That's right, 1 TiB per day, ~30TiB per month, double the traffic of 3 months ago, 10x the traffic of a year ago). We had several servers totally maxed out serving updates during the 4.2 release cycle. Did I mention server donations :) There are other ways to distribute the load other than rrdns ... like a load balancer ... but these usually only work well with geographically co-located machines. Since all our machines for mirror.centos.org rrdns are donated and they are disbursed throughout the US and EU. They don't work well with the typical load balancing. 2. Since our machines are not geographically co-located, we need to come up with another method to use multiple servers to distribute load. We are currently developing an application that will use geoip (and public mirrors that we verify are updated: http://www.centos.org/modules/tinycontent/index.php?id=13 along with the donated mirror.centos.org servers) to generate a mirrorlist for each country identified by geoip. This mirrorlist should then have good, fast and geographically accurate servers for each person who does updates. We hope to have this system functioning properly before the release of CentOS-4.3 and CentOS-3.7. If you use the optional fastestmirror plugin, you will even get the fastest mirror in each repo from the mirrorlist. The fastestmirror plugin is currently under heavy development by the people at yum (in which CentOS is helping) ... so it is going to change in the next couple months, but in it's current form it works well for those not on proxy servers to pick the fastest mirrors from a list. http://lists.centos.org/pipermail/centos-devel/2005-November/000947.html 3. Another common problem is transparent proxy servers and yum. HTTP mirrors and yum don't work really well via transparent proxy servers, so if you are using one, your best bet is to pick an FTP mirror from our public external server list (see mirror link above) instead of mirror.centos.org. ------------------------------- So, what can you do now if you have problems ... or just want to help. First thing is to pick several close mirrors and not use mirror.centos.org in your /etc/yum.repos.d/CentOS-Base.conf file. There is an example of a repo with more than 1 mirror in the fastestmirror link above. If you have more than 1 mirror for each repo (I recommend that you do) ... and if you don't have to use yum via a proxy server that blocks outbound client connections ... then you should try the fastestmirror plugin above to pick your best mirror from the list at yum run time. We will continue to strive to deliver CentOS within our means as we continue to grow by leaps and bounds, but we need the help and support of our user community if we are going to be able to continue to provide the same stellar services that we have all grown accustomed to. That means people who use CentOS will need to support it ... that is what the Community ENTerprise Operating System (CentOS) is all about. Thanks, Johnny Hughes

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