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Easy way to reject all incoming packets except from certain IPs?
by Preston Crawford 02 Feb '06

02 Feb '06

Is there an easy way to reject all incoming packets except those that come from certain IPs? I can't find any way via iptables or via the GUI provided with CentOS (or another GUI for CentOS) without having to resort to Shorewall. It's fine if the answer is "go with Shorewall". I just didn't want to have to become a Shorewall expert for this really small task. Any help/advice on this is appreciated. Am I missing an easier way? Preston

4 4

OT - Linux NAS for Windows Environment
by Ed Morrison 02 Feb '06

02 Feb '06

I'm looking to find a Linux NAS solution for a Windows network. Looking into FreeNAS and OpenFiler. Anyone using these or any other solution? Any comments/suggestions? Thanks, Ed

9 22

Junk mail filtering in Evolution
by Steve Bergman 02 Feb '06

02 Feb '06

I'm upgrading a few clients to CentOS 4.2. They have been using Evolution 1.x, so this is the first release that will have junk mail filtering. So I've switched from Thunderbird to Evolution on my own desktop tp better support them. I have been dutifully marking the spam and the ham. But the filter has so far not flagged a single email on its own. (I've flagged about a hundred so far, so it's had time to learn.) Is there something in the config that I need to set to get it to filter? One possible kink is that my own mail account uses imap. My users will be using pop3. Thanks, Steve

3 3

custom vnc install disk [dnk]
by lists 01 Feb '06

01 Feb '06

Hi all.... I had posted hte following on teh centos forums, and thought there might be additional people in here who do not browse those forum, so after 4 days I am posting over here as well (sorry for the double - but figured after 4 days it was safe to do so). Hi there.... I am trying to make a custom centos server cd that will essentially do the following: throw the disk in, boot the machine, and have it connect to a listening VNC viewer on another machine - then just do the install as per normal (nothing else automated other than the VNC connection). My goal is that since I have limited space at home I want to be able to load centos onto a machine just by plugging in an ethernet cable (no monitor/mouse/keyboard), and booting it. I know using VNC is possible and such, but in the tutorials I have read, you basically you type 'linux vnc' at the boot prompt. I was reading about using a kickstart file, but the same type of issue you need to press "enter" to start the vnc install. Any ideas on how to get around this? This is what I did so far (so that maybe someone can point out my error). Now just for detail I created a SIMPLE ks.cfg file with the following: firewall --disabled vnc --connect 192.168.0.100 And when adding directives to a kickstart file - does hte order matter? IE when addign hte vnc directive, does it have to come after the networking info, etc? it was located on my cd at: /isolinux/ks.cfg I edited the file /isolinux/isolinux.cfg <snip> default linux prompt 1 timeout 1 display boot.msg F1 boot.msg F2 options.msg F3 general.msg F4 param.msg F5 rescue.msg F7 snake.msg label linux kernel vmlinuz append initrd=initrd.img ramdisk_size=8192 ks=cdrom:/isolinux/ks.cfg <snip> As you can see i set the time out to happen immediately (hoping ot get it to jump right into the install). And I added the location to my KS file to the default option. Any ideas?

6 14

kdewebdev aka Quanta or repository kde-redhat.sourceforge.net
by Craig White 01 Feb '06

01 Feb '06

does this exist for CentOS 4 ? OK - next level of question then... taking a wild swing, I set up /etc/yum.repos/kde-redhat.repo and for S&G's, I ran the obligatory 'yum update' to see what would happen. It's an aggressive update to be sure. KDE 3.5.0 (and all the dependent stuff such as qt) but also samba and openoffice. Is anyone reporting happiness / contentment with their repo enabled and their updates installed? Craig

13 27

pdf to text converter
by Andrew Rice 01 Feb '06

01 Feb '06

Anyone know of any good pdf to text converters that will run on *nix platforms? -- Andrew Rice Jr Systems Analyst Carrier Management Systems, Inc. 500 Chestnut Street, Suite 500 Abilene, TX 79602 USA support: (325) 672-0975 office: (325) 677-5900 fax: (325) 676-0529 http://www.nams.net NAMS III, NAMS 2000 Centralized, NAMS BMX

5 4

Kernel Panic
by Mickael Maddison 01 Feb '06

01 Feb '06

Greetings, Had a system lock up last night. I've captured the following data from the logs: Jan 31 18:13:04 webserver kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000400 Jan 31 18:13:04 webserver kernel: printing eip: Jan 31 18:13:04 webserver kernel: c013f952 Jan 31 18:13:04 webserver kernel: *pde = 20ae6001 Jan 31 18:13:04 webserver kernel: Oops: 0000 [#1] Jan 31 18:13:04 webserver kernel: SMP Jan 31 18:13:04 webserver kernel: Modules linked in: loop md5 ipv6 autofs4 sunrpc ip_conntrack_ftp ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables microcode dm_mod button battery ac uhci_hcd hw_random e100 mii ext3 jbd ata_piix sata_promise libata sd_mod scsi_mod Jan 31 18:13:04 webserver kernel: CPU: 0 Jan 31 18:13:04 webserver kernel: EIP: 0060:[<c013f952>] Not tainted VLI Jan 31 18:13:04 webserver kernel: EFLAGS: 00010006 (2.6.9-22.0.1.ELsmp) Jan 31 18:13:04 webserver kernel: EIP is at find_lock_page+0x22/0x9d Jan 31 18:13:04 webserver kernel: eax: 00000400 ebx: 00000400 ecx: b7ff5000 edx: 00000400 Jan 31 18:13:04 webserver kernel: esi: e1f88a48 edi: e1c7bde0 ebp: 0000145b esp: e1c7bd90 Jan 31 18:13:04 webserver kernel: ds: 007b es: 007b ss: 0068 Jan 31 18:13:04 webserver kernel: Process popper (pid: 23878, threadinfo=e1c7b000 task=f7428eb0) Jan 31 18:13:04 webserver kernel: Stack: 00000000 e1c7bdd8 e1c7bde0 0000145b c014107c f7f42e00 0000005b 00000000 Jan 31 18:13:04 webserver kernel: b7ff405b 00000fa5 e1f88998 f88d3820 e1f88a48 edb09280 00000001 e1c7bef8 Jan 31 18:13:04 webserver kernel: 00000000 e1c7bebc 00000000 2f000000 00000000 00000000 e1c7be0c 00000000 Jan 31 18:13:04 webserver kernel: Call Trace: Jan 31 18:13:04 webserver kernel: [<c014107c>] generic_file_buffered_write+0xe5/0x47c Jan 31 18:13:04 webserver kernel: [<c012625c>] current_fs_time+0x44/0x4c Jan 31 18:13:04 webserver kernel: [<c012625c>] current_fs_time+0x44/0x4c Jan 31 18:13:04 webserver kernel: [<c014179c>] __generic_file_aio_write_nolock+0x389/0x3b7 Jan 31 18:13:04 webserver kernel: [<c0141803>] generic_file_aio_write_nolock+0x39/0x7f Jan 31 18:13:04 webserver kernel: [<c01419ed>] generic_file_aio_write+0x72/0xc6 Jan 31 18:13:04 webserver kernel: [<f88b9d7a>] ext3_file_write+0x19/0x8b [ext3] Jan 31 18:13:04 webserver kernel: [<c0159c3c>] do_sync_write+0x97/0xc9 Jan 31 18:13:04 webserver kernel: [<c011fec9>] autoremove_wake_function+0x0/0x2d Jan 31 18:13:04 webserver kernel: [<c02cf5cb>] __cond_resched+0x14/0x39 Jan 31 18:13:04 webserver kernel: [<c015962c>] generic_file_llseek+0x30/0xcb Jan 31 18:13:04 webserver kernel: [<c0159d24>] vfs_write+0xb6/0xe2 Jan 31 18:13:04 webserver kernel: [<c0159dee>] sys_write+0x3c/0x62 Jan 31 18:13:04 webserver kernel: [<c02d0fb7>] syscall_call+0x7/0xb Jan 31 18:13:04 webserver kernel: [<c02d007b>] __lock_text_end+0x232/0x100fJan 31 18:13:04 webserver kernel: Code: 04 19 00 89 d8 5b 5e 5f c3 55 89 d5 57 56 89 c6 8d 40 10 53 e8 d6 02 19 00 8d 46 04 89 ea e8 11 fe 07 00 85 c0 89 c3 74 6e 89 c2 <8b> 00 f6 c4 80 74 03 8b 53 0c f0 ff 42 04 f0 0f ba 2b 00 19 c0 Jan 31 18:13:04 webserver kernel: <0>Fatal exception: panic in 5 seconds Jan 31 18:13:05 webserver crond(pam_unix)[23911]: session closed for user root What's the best way to track down the source of this panic? -- Best regards, Mike

1 0

how to keep updated
by spart cus 01 Feb '06

01 Feb '06

hi guys, just recently install centos on my machine. how can i be always updated from patches? should i run up2date and install everything ? --------------------------------- Do you Yahoo!? With a free 1 GB, there's more in store with Yahoo! Mail.

3 3

Kernel to boot?
by spart cus 01 Feb '06

01 Feb '06

hi guys, after installing centos on my ml350 i found 2 choices on the grub options. CENTOS-4 i386 (2.6.9-22.ELsmp) CENTOS-4 i386-up (2.6.9-22.EL) what choice will i choose ? --------------------------------- Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, & more on new and used cars.

3 2

Booting centos from a windows ris server
by Plant, Dean 01 Feb '06

01 Feb '06

We are thinking of using pxe boot with a windows ris server to start off a Centos 4 install. Does anyone know if this is possible? Thanks Dean

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