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Re: [CentOS] GnuPG for CentOS 5.3?
by lhecking＠users.sourceforge.net 02 Oct '09

02 Oct '09

> IMO the default install of gpg is good enough. Remember, you break it, you > get to keep the pieces. "Good enough" is in the eye of the beholder. If you want to use gpg-agent and pinentry, you need gpg2.

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GnuPG for CentOS 5.3?
by Dick Roth 02 Oct '09

02 Oct '09

Good Morning-- I'm looking to shore up security in my system and with communications. Can you point me to the proper version of GnuPG for CentOS 5.3 (Final)? Thanks, Dick -- "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." --Benjamin Franklin 1755

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Reply to ICMP echo request (type 8) on different (ethernet) interface
by Timo Schoeler 02 Oct '09

02 Oct '09

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi list, I have a weird (?) problem here on a setup running CentOS 5.3 x86_64 (and OpenVZ, and some home-brew L2TP daemons, RIPd, BGPd, etc). There's a (VE in OpenVZ speak) virtual machine that has two ethernet interfaces, seen as eth0 and eth1, respectively. Those live in VLANs, but it's not important here. The thing is that on eth1 the default route lives, while on eth0 all traffic comes in. So, sending a ping to the IP address of eth0 tcpdump shows that the echo request (type 8) packet arrives on the machine. However, the machine does _not_ send an echo reply (type 0) back to the machine that pings eth0, maybe because it would have to emerge from eth1. One exception (an obvious one) is that IPs on the /29 where eth0 lives on _can_ ping eth0 and receive an answer -- this is because the packets don't have to take 'the default route', which lives on the other interface, eth1. This seems to me like decent behaviour. However, I really need eth0 to be able to be pinged from the outside world, it's totally okay for me that eth1 would 'answer' and send the echo replies instead of eth0. Is there anything I can tweak (via sysctl or whatever)? TIA, Timo -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - http://enigmail.mozdev.org/ iD8DBQFKxOC0O/2mgkVVV7kRAgjGAJ9B292FpBzUSS3rpUcZgPE+utWn5wCglptc dNUSD4i4iF4KaAiG1+jFdeg= =QTM+ -----END PGP SIGNATURE-----

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Problems getting scanner to work from xsane (from Gnome Menu or GIMP)
by Robert Heller 01 Oct '09

01 Oct '09

We have a networked HP OfficeJet All-In-One. I have the scanner working with the CentOS 5.3, except xsane is ignoring SANE_DEFAULT_DEVICE. scanimage does however take this environment variable just fine: server1.wendellfreelibrary.org% scanimage -L No scanners were identified. If you were expecting something different, check that the scanner is plugged in, turned on and detected by the sane-find-scanner tool (if appropriate). Please read the documentation which came with this software (README, FAQ, manpages). default device is `hpaio:/net/Officejet_Pro_L7700?ip=192.168.1.253' server1.wendellfreelibrary.org% scanimage -T scanimage: scanning image of size 638x1125 pixels at 24 bits/pixel scanimage: acquiring RGB frame, 8 bits/sample scanimage: reading one scanline, 1914 bytes... PASS scanimage: reading one byte... PASS scanimage: stepped read, 2 bytes... PASS scanimage: stepped read, 4 bytes... PASS scanimage: stepped read, 8 bytes... PASS scanimage: stepped read, 16 bytes... PASS scanimage: stepped read, 32 bytes... PASS scanimage: stepped read, 64 bytes... PASS scanimage: stepped read, 128 bytes... PASS scanimage: stepped read, 256 bytes... PASS scanimage: stepped read, 512 bytes... PASS scanimage: stepped read, 1024 bytes... PASS scanimage: stepped read, 2048 bytes... PASS scanimage: stepped read, 2047 bytes... PASS scanimage: stepped read, 1023 bytes... PASS scanimage: stepped read, 511 bytes... PASS scanimage: stepped read, 255 bytes... PASS scanimage: stepped read, 127 bytes... PASS scanimage: stepped read, 63 bytes... PASS scanimage: stepped read, 31 bytes... PASS scanimage: stepped read, 15 bytes... PASS scanimage: stepped read, 7 bytes... PASS scanimage: stepped read, 3 bytes... PASS server1.wendellfreelibrary.org% echo "$SANE_DEFAULT_DEVICE" hpaio:/net/Officejet_Pro_L7700?ip=192.168.1.253 xsane just pops up a little window "scanning for devices", the "no devices available". I believe I have things properly setup with cups: In /etc/cups/printers.conf: <Printer Officejet_Color> Info Location Printer Area #DeviceURI socket://192.168.1.253:9100 DeviceURI hp:/net/Officejet_Pro_L7700?ip=192.168.1.253 State Idle StateTime 1211313246 Accepting Yes Shared Yes JobSheets none none QuotaPeriod 0 PageLimit 0 KLimit 0 OpPolicy default ErrorPolicy retry-job </Printer> -- Robert Heller -- Get the Deepwoods Software FireFox Toolbar! Deepwoods Software -- Linux Installation and Administration http://www.deepsoft.com/ -- Web Hosting, with CGI and Database heller(a)deepsoft.com -- Contract Programming: C/C++, Tcl/Tk

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Printing problems with Firefox
by Robert Heller 01 Oct '09

01 Oct '09

I have been having problems printing web pages with Firefox under CentOS 4.8: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.14) Gecko/2009091009 CentOS/3.0.14-1.el4.centos Firefox/3.0.14 What happens is that some of the text is 'scrambled' (looks like somehow something is messed up with the font encoding of whatever font is being used). Sometimes the postscript (or PDF) code being generated is broken (the ghostscript print filter crashes because the postscript is broken or incomplete. For one page I get the console message "could not load glyph 321". When I print to a file and select 'PDF' format, I get sometimes PDF files that ghostview (gv-3.6.2-2.el4)/ghostscript (ghostscript-7.07-33.11.el4) find errors with. Xpdf (xpdf-3.00-20.el4) also does not like these PDF files (lots of errors of various sorts). Even Adobe's acroread does not like them sometimes. Sometimes, with enough fussing with I can get the PDF files to print. Sometimes I end up taking a screen shot with gimp of the Adobe acroread window and print that. :-( I have done two things: 1) Created a fresh profile and re-populated with my bookmarks, passwords, and addons. No difference. 2) Created a fresh profile and did not re-populate with with anything (basically a 'vanila' profile). I still have problems. It appears that there is some system setting or some package I have loaded (I have a bunch of packages from rpmforge and epel installed). I also have some extra fonts installed. I am not sure what the problem is. I have Seamonkey installed and Seamonkey *seems* to print at least some pages properly (not extensively tested). I like firefox and have it all setup the way I like. Everything *except* printing works just fine. Firefox *used* to print just fine. I *think* the problem with printing started with Firefox 3.0.<mumble>, but I am not sure exactly. Oh, I *don't* run either the Gnome or KDE desktop environment -- I use a plain window manager only (FVWM in MWM mode). -- Robert Heller -- 978-544-6933 Deepwoods Software -- Download the Model Railroad System http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows heller(a)deepsoft.com -- http://www.deepsoft.com/ModelRailroadSystem/

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OT: dmidecode data - what is maximum RAM capacity of this box?
by Lanny Marcus 01 Oct '09

01 Oct '09

In Timo's thread about RAM today, I noticed dmidecode and I got the data for my Dell Dimension 2400 (Celeron CPU) box, which is below. I won this box in a raffle, during February 2005. After I got the box, I got conflicting information, from Crucial.com and from Dell Latin America, regarding the maximum RAM configuration. To be conservative, I bought two 256 MB DIMMS from Crucial.com, early in 2005. Running dmidecode, I got the below information. Questions: (a) Is the maximum capacity of this motherboard 1 GB instead of the 512 MB I thought it was? (b) Is it possible the mainboard capacity is 1 GB, but that the BIOS limits to 512 MB? To add further confusion, I just searched for this model on crucial.com and they are showing 2 GB total capacity. However, they do not allow one to select between the Celeron CPU which I have and a non Celeron CPU and they may have different capacity. TIA! Lanny dmidecode for Dell Dimension 2400 Celeron box Handle 0x1000, DMI type 16, 15 bytes. Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 1 GB Error Information Handle: Not Provided Number Of Devices: 2 Handle 0x1100, DMI type 17, 23 bytes. Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 256 MB Form Factor: DIMM Set: None Locator: DIMM_1 Bank Locator: Not Specified Type: SDRAM Type Detail: Synchronous Speed: 266 MHz (3.8 ns) Handle 0x1101, DMI type 17, 23 bytes. Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 256 MB Form Factor: DIMM Set: None Locator: DIMM_2 Bank Locator: Not Specified Type: SDRAM Type Detail: Synchronous Speed: 266 MHz (3.8 ns) Handle 0x1301, DMI type 19, 15 bytes. Memory Array Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0001FFFFFFF Range Size: 512 MB Physical Array Handle: 0x1000 Partition Width: 0 Handle 0x1402, DMI type 20, 19 bytes. Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0000FFFFFFF Range Size: 256 MB Physical Device Handle: 0x1100 Memory Array Mapped Address Handle: 0x1301 Partition Row Position: 1 Handle 0x1403, DMI type 20, 19 bytes. Memory Device Mapped Address Starting Address: 0x00010000000 Ending Address: 0x0001FFFFFFF Range Size: 256 MB Physical Device Handle: 0x1101 Memory Array Mapped Address Handle: 0x1301 Partition Row Position: 1 from Crucial.com Q: How much memory can my computer handle? from Crucial.com A: 2048MB.

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vncviewer and IPv6
by Robert Moskowitz 01 Oct '09

01 Oct '09

I have a host that I have been accessing with vncviewer via its fqdn that had only an IPv4 A record. I just added a AAAA IPv6 record, and vncviewer via fqdn stopped working. But worked when I provided the IPv4 address instead. It LOOKS like vncviewer is trying the IPv6 address, eventhough all documentation indicates that it does not support IPv6. Definitely my server is only listening on the IPv4 interface. SSH has a nice -4 option to force using IPv4; there is no similar option for vncviewer. Does anyone have any idea on how to enforce IPv4 usage for IPv6-dead vncviewer? Yes, I DO want IPv6 on this server....

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Any known problems with kernel-2.6.18-164.el5.x86_64 / x86_64 / 3ware?
by mbneto 01 Oct '09

01 Oct '09

Hi, I have a server that is running centos 5.3 x86_64 that until last week was running fine. With no error messages in console and in /var/log/messages the server simply stops responding. After a reboot everything is fine. The only change (that I could find) but that was not active before the first incident/reboot was the update of the kernel and friends. The server (is this can help) is a intel quad core, 8GB RAM , 3 x 1TB disks (raid mirror with 2 active / 1 spare via 3ware controller) Any known problem with the kernel-2.6.18-164.el5.x86_64? (I am assuming that this would be the only thing that could cause the problem due to the lack of other messages. Regards. yum.log Sep 24 12:13:48 Updated: openssl-0.9.8e-12.el5.x86_64 Sep 24 12:13:49 Updated: mysql-5.0.77-3.el5.x86_64 Sep 24 12:13:49 Updated: nspr-4.7.5-1.el5_4.x86_64 Sep 24 12:13:49 Updated: openssl-0.9.8e-12.el5.i686 Sep 24 12:13:49 Installed: libXrender-0.9.1-3.1.i386 Sep 24 12:13:49 Installed: freetype-2.2.1-21.el5_3.i386 Sep 24 12:13:51 Installed: fontconfig-2.4.1-7.el5.i386 Sep 24 12:13:52 Updated: mysql-5.0.77-3.el5.i386 Sep 24 12:13:52 Installed: libjpeg-6b-37.i386 Sep 24 12:13:52 Installed: 2:libpng-1.2.10-7.1.el5_3.2.i386 Sep 24 12:13:52 Updated: openssh-4.3p2-36.el5.x86_64 Sep 24 12:13:52 Updated: gnutls-1.4.1-3.el5_3.5.x86_64 Sep 24 12:13:52 Installed: keyutils-1.2-1.el5.x86_64 Sep 24 12:13:52 Installed: cairo-1.2.4-5.el5.i386 Sep 24 12:13:52 Installed: libtiff-3.8.2-7.el5_3.4.i386 Sep 24 12:13:53 Installed: atk-1.12.2-1.fc6.i386 Sep 24 12:13:53 Installed: libXfixes-4.0.1-2.1.i386 Sep 24 12:13:53 Updated: lftp-3.7.11-4.el5.x86_64 Sep 24 12:13:53 Installed: trousers-0.3.1-4.el5.x86_64 Sep 24 12:13:53 Updated: ecryptfs-utils-75-5.el5.x86_64 Sep 24 12:13:53 Installed: libXcursor-1.1.7-1.1.i386 Sep 24 12:13:53 Installed: libXft-2.1.10-1.1.i386 Sep 24 12:13:53 Installed: pango-1.14.9-5.el5.centos.i386 Sep 24 12:13:53 Installed: libXrandr-1.1.1-3.1.i386 Sep 24 12:13:54 Updated: nspr-4.7.5-1.el5_4.i386 Sep 24 12:13:54 Installed: libXinerama-1.0.1-2.1.i386 Sep 24 12:13:54 Installed: gnutls-1.4.1-3.el5_3.5.i386 Sep 24 12:13:54 Updated: openssh-clients-4.3p2-36.el5.x86_64 Sep 24 12:13:54 Updated: openssh-server-4.3p2-36.el5.x86_64 Sep 24 12:13:55 Updated: mysql-server-5.0.77-3.el5.x86_64 Sep 24 12:13:56 Updated: 1:nfs-utils-1.0.9-42.el5.x86_64 Sep 24 12:13:56 Updated: dnsmasq-2.45-1.1.el5_3.x86_64 Sep 24 12:13:57 Updated: openssl-devel-0.9.8e-12.el5.x86_64 Sep 24 12:13:57 Updated: mysql-devel-5.0.77-3.el5.x86_64 Sep 24 12:13:57 Updated: mysql-devel-5.0.77-3.el5.i386 Sep 24 12:14:04 Installed: kernel-2.6.18-164.el5.x86_64 Sep 24 12:14:04 Updated: kernel-headers-2.6.18-164.el5.x86_64 Sep 24 12:14:04 Installed: 1:cups-libs-1.3.7-8.el5_3.6.i386 Sep 24 12:14:05 Installed: gtk2-2.10.4-20.el5.i386 Sep 24 12:14:05 Installed: trousers-0.3.1-4.el5.i386 Sep 24 12:14:05 Updated: ecryptfs-utils-75-5.el5.i386

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Re: [CentOS] Asterisk and VOIP was Re: CentOS for non-tech user
by Les Bell 01 Oct '09

01 Oct '09

Chan Chung Hang Christopher <christopher.chan(a)bradbury.edu.hk> wrote: >> Ah, well, if you want to keep the landlines, then yeah, I guess asterisk is the way to go. If your goal is to replace keyline systems, then asterisk definitely has that kind of support which, it appears, even Cisco's solution does not (from the mouth of Datacraft Asia personnel selling the school Cisco's voip solution). << I replaced our PBX with an Asterisk box and Snom VoIP phones for just this reason. All calls are made over POTS lines, although I did have it working over IAX2 with FreeWorldDialup back when they offered a free service. The functionality is significantly better than the old PBX, with a menu system to connect callers to the right extension during business hours, conferencing, voicemail with forwarding by email, etc. I have an OpenVPN connection from my desktop machine at the university where I work back to my home office LAN and can use a softphone to answer my home phone while at the office, etc. Quite neat. I've even programmed it to fetch the area weather forecast and read it out when you dial one extension. This has been much more useful than I expected - when I get sales calls from people I really don't want to deal with, I just say, "Please hold the line - I'm going to transfer you to the right person" and then transfer the call to the weather forecast. The sales person now gets what sounds like Stephen Hawking reading them the weather. Easily the best use for Asterisk ever. My setup is running on Centos 4.8 and has been a breeze to maintain. Nothing is exposed to the outside world, so I haven't felt pressured to apply updates, etc. However, I did do a little experimenting and found that it's remarkably easy to record calls using Cain+Abel to conduct an ARP cache poisoning attack between any phone and the Asterisk server. The only defences against this are to implement SRTP (Secure Real-Time Protocol), but last time I looked, this required SIP over TCP, which Asterisk did not support (not to mention having to set up a PKI and issue certs to the phones), or the much simpler control of ensuring that all phones are on a separate VLAN from the computers. For any reasonable-sized setup this isn't too hard to achieve as you may well want to buy a PoE switch to power the phones (wall warts are a PITA). There's also an excellent publication on VoIP in the NIST 800-series Special Publications, which is worth looking at. Best, --- Les Bell [http://www.lesbell.com.au] Tel: +61 2 9451 1144

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ignore please.
by Brian McKerr 01 Oct '09

01 Oct '09

testing email delivery

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