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Iptables port forwarding help
by Thomas E Dukes 14 Apr '06

14 Apr '06

Hello, I have a webcam that I wish to view from the internet. It is a wireless linksys model with an ip address of 192.168.1.15. I have it set on port 8081, 192.168.1.15:8081. I am using the IP Masquerade HowTo script. Here's the rule I added to my firewall script: EXTIF="ppp0" INTIF="eth1" EXTIP="`$IFCONFIG $EXTIF | grep inet | cut -d : -f 2 | cut -d \ -f 1`" $IPTABLES -A FORWARD -i $EXTIF -o $INTIF -p tcp --dport 8081 -m state \ --state NEW,ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A PREROUTING -t nat -p tcp -d $EXTIP --dport 8081 \ -j DNAT --to 192.168.1.15:8081 Its not working. Can anyone offer a suggestion? TIA

2 2

Sorting of passwd/group files
by Kai Schaetzl 13 Apr '06

13 Apr '06

Is there a program on CentOS which will sort my passwd/group etc. files by username or uid/gid? On Suse I can do this with a sysconfig switch and Suseconfig, is there something similar on RH-based systems? Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com

5 6

rescue boot - udev question
by Les Mikesell 13 Apr '06

13 Apr '06

Is there some documentation about what happens to populate /dev when you boot the install disk in rescue mode and it automatically mounts an installed system and suggests that you chroot to /mnt/sysimage? With Centos 3.x you could do the mounts yourself in cases where it wouldn't work automatically and end up looking approximately the same. With 4.x, after the chroot, /dev appears to be empty unless the automatic mount worked. -- Les Mikesell lesmikesell(a)gmail.com

1 0

Pause after network initialization
by Joshua Baker-LePain 13 Apr '06

13 Apr '06

Is there a "proper" way to put in a pause after network initialization to make sure the network *really* is up? I've had this issue for a while with e1000 cards (even on 100MB networks), where the first NFS mount will fail b/c the network reports up but isn't, really. Now, I'm also seeing the same issue on cluster nodes hooked to a switch with jumbo frames enabled. I used to hack it with a 'sleep 60' at the end of the "start" function in /etc/init.d/network, but that goes away whenever initscripts gets updated. My new hack is to put 'mount -a -t nfs' in /etc/rc.local. Any other suggestions? -- Joshua Baker-LePain Department of Biomedical Engineering Duke University

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RE: [CentOS] reinstall packages
by Bowie Bailey 13 Apr '06

13 Apr '06

Paul Heinlein wrote: > On Thu, 13 Apr 2006, Bowie Bailey wrote: > > > I have some rpm packages that I built locally. After installing and > > configuring them, I found a problem that required a source patch. > > I have rebuilt the rpms, but since they have the same version number > > as the original, I can't use "yum localupdate" to install them. Is > > there a clean way to do this with yum, or do I just need to remove > > the old packages and then install the new ones? > > Is there a reason you didn't bump the Release: header in the .spec > file? That's the typical mechanism for declaring one binary rpm newer > than another. Because I don't know anything about building packages beyond running "rpmbuild". All I did was download the tarfile, extract it, patch it, retar it, and run rpmbuild. Is the Release: header the only thing I need to change? I looked into that briefly, but I wasn't sure if there was anything else that would need to be updated. -- Bowie

2 1

device-mapper multipath
by Eric Lee 13 Apr '06

13 Apr '06

I am attempting to get multipath working with device-mapper (CentOS 4.2 and 4.3). It works on EVERY install of mine from RH (also v4.2, 4.3), but the same multipath.conf imported to all my installs of CentOS do not work. Note that I have tested a working 4.2 configuration file from RH on CentOS 4.2 and a working 4.3 configuration (it changed slightly) on CentOS 4.3. Neither worked. Our production systems are RH 4.2 so the 4.2 configuration file is below. Configuration: Promise vTrak 300i iSCSI iscsi-initiator-utils from 4.2/4.3 device-mapper-multipath from 4.2/4.3 Procedure: 1. Configure iscsi.conf and multipath.conf 2. Start iscsi: service iscsi start 3. Start multipath: service multipathd start 4. Make sure no stale paths exist: multipath -F 5. Scan and create paths: multipath -v 3 Below are the relevant configuration files: ======================================================== My iscsi.conf is very simple: DiscoveryAddress=172.16.160.60 ======================================================== >From iscsi-ls, the output is: ******************************************************************************* SFNet iSCSI Driver Version ...4:0.1.11(12-Jan-2005) ==================================================== There are two sessions, this creates two targets: # ls /dev/sd* /dev/sda /dev/sda2 /dev/sda5 /dev/sdb /dev/sdb2 /dev/sdb5 /dev/sda1 /dev/sda3 /dev/sda6 /dev/sdb1 /dev/sdb3 /dev/sdb6 ===================================================== The multipath.conf is as follows: defaults { multipath_tool "/sbin/multipath -v0" udev_dir /dev polling_interval 10 default_selector "round-robin 0" default_path_grouping_policy multibus default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n" default_prio_callout "/bin/true" default_features "0" rr_wmin_io 100 failback immediate } devnode_blacklist { devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*" devnode "^hd[a-z][[0-9]*]" devnode "^hda[0-9]*" devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]" } multipaths { multipath { wwid 222ea000155eadda4 alias stor path_grouping_policy multibus path_checker readsector0 path_selector "round-robin 0" failback immediate } } ================================================== The output from "multipath -v 3" of my CentOS machine is below: load path identifiers cache # # all paths in cache : # 222ea000155eadda4 0:0:0:0 sda 8:0 [ready] Promise /VTrak M300i /2200 222ea000155eadda4 1:0:0:0 sdb 8:16 [ready] Promise /VTrak M300i /2200 dm-0 blacklisted dm-1 blacklisted hda blacklisted hdc blacklisted md0 blacklisted ram0 blacklisted ram10 blacklisted ram11 blacklisted ram12 blacklisted ram13 blacklisted ram14 blacklisted ram15 blacklisted ram1 blacklisted ram2 blacklisted ram3 blacklisted ram4 blacklisted ram5 blacklisted ram6 blacklisted ram7 blacklisted ram8 blacklisted ram9 blacklisted ===== path info sda (mask 0x1f) ===== bus = 1 dev_t = 8:0 size = 3503903232 vendor = Promise product = VTrak M300i rev = 2200 h:b:t:l = 0:0:0:0 tgt_node_name = serial = 000000000000000000000000D46D0E4B486DC672 path checker = readsector0 (internal default) state = 2 getprio = /bin/true (internal default) prio = 0 uid = 222ea000155eadda4 (cache) ===== path info sdb (mask 0x1f) ===== bus = 1 dev_t = 8:16 size = 3503903232 vendor = Promise product = VTrak M300i rev = 2200 h:b:t:l = 1:0:0:0 tgt_node_name = serial = 000000000000000000000000D46D0E4B486DC672 path checker = readsector0 (internal default) state = 2 getprio = /bin/true (internal default) prio = 0 uid = 222ea000155eadda4 (cache) # # all paths : # 222ea000155eadda4 0:0:0:0 sda 8:0 [ready] Promise /VTrak M300i /2200 222ea000155eadda4 1:0:0:0 sdb 8:16 [ready] Promise /VTrak M300i /2200 pgpolicy = multibus (LUN setting) selector = round-robin 0 (LUN setting) features = 0 (internal default) hwhandler = 0 (internal default) rr_weight = 2 (config file default) no_path_retry = -1 (config file default) pg_timeout = NONE (internal default) 0 3290934 multipath 0 0 1 1 round-robin 0 2 1 8:0 100 8:16 100 set ACT_CREATE: map does not exists message stor 0 switch_group 1 create: stor (222ea000155eadda4) [size=1 GB][features="0"][hwhandler="0"] \_ round-robin 0 \_ 0:0:0:0 sda 8:0 [ready] \_ 1:0:0:0 sdb 8:16 [ready] reloading features ^^^^^^^^ Notice the 1GB in the map created. I have read in mailing list posts that 1GB is returned when it is unable to find the size. ================================================== The output from "multipath -v 3" of the working 4.2/4.3 machine is below: hda blacklisted hdc blacklisted md0 blacklisted ram0 blacklisted ram10 blacklisted ram11 blacklisted ram12 blacklisted ram13 blacklisted ram14 blacklisted ram15 blacklisted ram1 blacklisted ram2 blacklisted ram3 blacklisted ram4 blacklisted ram5 blacklisted ram6 blacklisted ram7 blacklisted ram8 blacklisted ram9 blacklisted path sda not found in pathvec ===== path sda ===== bus = 1 dev_t = 8:0 size = 3503903232 vendor = Promise product = VTrak M300i rev = 2200 h:b:t:l = 0:0:0:0 tgt_node_name = serial = 000000000000000000000000D46D0E4B486DC672Ð path checker = readsector0 (internal default) state = 2 getprio = /bin/true (internal default) prio = 0 getuid = /sbin/scsi_id -g -u -s /block/%n (internal default) uid = 222ea000155eadda4 (callout) path sdb not found in pathvec ===== path sdb ===== bus = 1 dev_t = 8:16 size = 3503903232 vendor = Promise product = VTrak M300i rev = 2200 h:b:t:l = 1:0:0:0 tgt_node_name = serial = 000000000000000000000000D46D0E4B486DC672Ð path checker = readsector0 (internal default) state = 2 getprio = /bin/true (internal default) prio = 0 getuid = /sbin/scsi_id -g -u -s /block/%n (internal default) uid = 222ea000155eadda4 (callout) # # all paths : # 222ea000155eadda4 0:0:0:0 sda 8:0 [VTrak M300i ] 222ea000155eadda4 1:0:0:0 sdb 8:16 [VTrak M300i ] pgpolicy = multibus (LUN setting) selector = round-robin 0 (LUN setting) features = 0 (internal default) hwhandler = 0 (internal default) 0 3492951862 multipath 0 0 1 1 round-robin 0 2 1 8:0 1000 8:16 1000 action preset to 0 action set to 4 create: stor (222ea000155eadda4) [size=1 TB][features="0"][hwhandler="0"] \_ round-robin 0 \_ 0:0:0:0 sda 8:0 \_ 1:0:0:0 sdb 8:16 message stor 0 switch_group 1 ^^^^^^^^ it detects the size correctly (it is over 1TB, it seems to do some rounding when it reports it here) ==================================== note the multipath config lines: not working: 0 3290934 multipath 0 0 1 1 round-robin 0 2 1 8:0 100 8:16 100 working: 0 3492951862 multipath 0 0 1 1 round-robin 0 2 1 8:0 1000 8:16 1000 The primary difference is in the 2nd number. That is, according to the multipath wiki, the "target length in 512-bytes blocks" for the multipath device. The one that does not work is smaller by a factor of 1063 (close to 1024, maybe it is using different units?) Has anyone run into any issue of this sort?

1 0

firewall and * suggestions
by Simone 13 Apr '06

13 Apr '06

Hi, I am going to set up an office of 30 employees and since it's the first time I thought I will ask for suggestions (trying to make a CentOS base office :) ). I was planning to re use an old Compaq LPr PII 450, sw mirrored scsi 10000rpm disks, 448Mb RAM, to build a CentOS based firewall and I was wondering if this hardware would be enough to serve 30 clients (I already have a centos firewall serving 8 users on a PC celeron 1,3Ghz machine and top shows average load 0.00). The other service they'll need is filesharing, which will be Samba running on samba Dell PE1800 (although we could use a compaq 1850r PIII 600), while for the phone system I would like to set up Asterisk and I was wondering if anyone has had a good experience with the Xorcom TS-1, which seems a nice cost effective system. Suggestions are very welcome, have a nice day. Simone

2 1

JavaRunTime Install Error
by Mark Sargent 13 Apr '06

13 Apr '06

Hi All, I installed the following from here, http://java.com/en/download/manual.jsp and followed here, http://java.com/en/download/help/5000010500.xml#rpm what am I doing wrong? Also, how does one find where the rpm installed to? whereis or locate or find or is there a rpm option? Cheers Mark Sargent. [coolprogrammer@localhost local]$ sudo /bin/rpm -iv jre-1_5_0_06-linux-i586.rpm Preparing packages for installation... jre-1.5.0_06-fcs [coolprogrammer@localhost local]$ ls Adobe apache2 bin etc games include javarun jre-1_5_0_06-linux-i586.rpm lib libexec man mysql sbin share src [coolprogrammer@localhost local]$ whereis jre-1.5.0_06-fcs jre-1.5: [coolprogrammer@localhost local]$ man rpm [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre-1_5_0_06-linux-i586.rpm package jre-1.5.0_06-fcs is already installed [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre-1.5 error: open of jre-1.5 failed: No such file or directory [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre-1.5.0_06-fcs error: open of jre-1.5.0_06-fcs failed: No such file or directory Ok, I re-checked my steps, [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre* package jre-1.5.0_06-fcs is already installed [coolprogrammer@localhost local]$ sudo /bin/rpm -e jre-1.5.0_06-fcs [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre* [coolprogrammer@localhost local]$ sudo /bin/rpm -iv jre-1_5_0_06-linux-i586.rpm Preparing packages for installation... package jre-1.5.0_06-fcs is already installed [coolprogrammer@localhost local]$ ls Adobe apache2 bin etc games include jre-1_5_0_06-linux-i586.rpm lib libexec man mysql sbin share src

3 3

reinstall packages
by Bowie Bailey 13 Apr '06

13 Apr '06

I have some rpm packages that I built locally. After installing and configuring them, I found a problem that required a source patch. I have rebuilt the rpms, but since they have the same version number as the original, I can't use "yum localupdate" to install them. Is there a clean way to do this with yum, or do I just need to remove the old packages and then install the new ones? -- Bowie

4 3

'partitions not contstrained to drive'???
by Les Mikesell 13 Apr '06

13 Apr '06

I was trying to do a new install on RAID1 and my first drive happened to be partitioned correctly from previous use so I tried the 'clone partions' option in disk druid to create matching ones on the second drive and got this error message: "The source drive has partitions which are not constrained to the drive /dev/sda". What does that mean? -- Les Mikesell lesmikesell(a)gmail.com

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