Linuxers July 2006

linuxers@mm.ilug-bom.org.in

102 participants
166 discussions

SSH Filesystem
by Sameer Bagwe 14 Jul '06

14 Jul '06

This is a really kool utility. Now i don't have to always use great samba or stupid NFS for linux to linux in certain scenarios http://fuse.sourceforge.net/sshfs.html PS: *Peace* if the great one's here already know about it ! Regards.

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Redwall Firewall
by Sameer Bagwe 14 Jul '06

14 Jul '06

Though I rely on my own firewall script for the gateway and I haven't checked this one. There are other firewall distros like clones smoothwall-ipcop , monowall etc. But i find this one more feature rich compared to the one's above: http://www.redwall-firewall.com/ Regards.

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Redwall Firewall
by Sameer Bagwe 14 Jul '06

14 Jul '06

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Cafe Coffee Day goes the GNU/Linux way...
by Debarshi 'Rishi' Ray 14 Jul '06

14 Jul '06

Have a look at this blog entry: http://g33k.wordpress.com/2006/07/03/the-coffee-now-smells-better/

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[FYI] - Debian 3.1 DVD w/ LFY/Jul/06
by Arun K. Khan 13 Jul '06

13 Jul '06

FWIW, Debian 3.1 DVD is included with the LFY July/06 issue. -- Arun Khan (knura at yahoo dot com) On the road, ZIPPY is a pinhead without a purpose, but never without a POINT ...

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Re: [ILUG-BOM] mail delivery problem with china
by Amish Mehta 13 Jul '06

13 Jul '06

Arun K. Khan wrote: > >On Thu, 2006-07-13 at 12:22 +0530, Amish Mehta wrote: >> I have a customer who uses linux (RH9) and sendmail as outgoing >> SMTP server. >> >> There is a strange problem. SMTP server delivers e-mails >> everywhere around the world except the domains in China. Most of >> times sendmail gives errors that "lookup failed" and returns >> e-mails after 5 days of trying. > The NS machines must be down/unreachable or the NS entries @ the Domain > registrar may not be up to date. Have you tried to resolve MX record > manually? Yes MX resolves... but I tried debug mode with -d<N.NN>. Sendmail fails at lookup of AAAA record (which it does before doing MX). But sometimes it DOES succeed and mails get delivered too. But most of times it does not succeed. So I dont know why? It fails with both local as well as iqara DNS. I also updated 'root' zone but problem still exists. >> For some domains it states "invalid sender xyz(a)vsnl.net" and keeps >> trying for 5days. > I know you are using sendmail but ... > Are you trying to send the messages directly from your own SMTP server i.s.o. > of the ISP's SMTP relay (smart host)? If so, the receiving MTAs may be > configured to reject messages from IPs that do not match with vsnl.net's > SMTP host(s). Well I cant use VSNL as smart host as customer uses iqara network and VSNL allows only its own network to use its own SMTP. So their is no smart host, its directly delivery. But right now I am interested in solving "lookup failure" problem first not this one. You may be right for this "invalid sender" problem. Thanks. Amish.

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Re: [ILUG-BOM] mail delivery problem with china
by Amish Mehta 13 Jul '06

13 Jul '06

Dinesh Joshi wrote: > >On Thursday 13 July 2006 12:22, Amish Mehta wrote: >*snip* >> On Googleing I found someone having same problem way back in 2001 >> but there was no solution. Also I found there is lots of control >> by Chinese government. >> >> Is this problem with RH9? or sendmail with RH9? But then why does >> problem occur only with China? >> >> So please let me know if someone has (had) same problem and >> solution if it was solved. > > Umm...he needn't use Sendmail as his outgoing SMTP. He can use his > provider's SMTP server. The problem shouldn't be with RH9 since is a > very well tested, stable distro and still is being used commercially. > If there is such a bug then it should be reported on Redhat's bugzilla > but it seems highly unlikely. I dont like idea of smarthost, afterall Linux is capable and I dont like ISP queuing up mails. Recording mails is easy that way. Its not that I dont trust the ISP but I prefer instant and direct delivey. > I dont think the great firewall of China has anything to do with it. > AFAIK, if the reverse look up on your IP fails then your mail isn't > accepted by the target's SMTP server. I guess this must be your problem > because I dont think your customer has bought a domain name and a > static IP... Reverse lookup exists but ofcourse points to something.iqara.net. But then noone can have fully qualified domain as reverse lookup. Many companies have multiple domains. One IP cant reverse lookup to all. Amish.

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mail delivery problem with china
by Amish Mehta 13 Jul '06

13 Jul '06

Hello All, I have a customer who uses linux (RH9) and sendmail as outgoing SMTP server. There is a strange problem. SMTP server delivers e-mails everywhere around the world except the domains in China. Most of times sendmail gives errors that "lookup failed" and returns e-mails after 5 days of trying. These are domains hosted in China. Sometimes delivery succeeds when I do: sendmail -v -q For some domains it states "invalid sender xyz(a)vsnl.net" and keeps trying for 5days. I tried with local DNS as well as ISP (iqara) DNS. But problem exists with both. On Googleing I found someone having same problem way back in 2001 but there was no solution. Also I found there is lots of control by Chinese government. Is this problem with RH9? or sendmail with RH9? But then why does problem occur only with China? So please let me know if someone has (had) same problem and solution if it was solved. Thanks in advance. Amish. P.S. OT question: anyone know if iqara provides SMTP server?

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[Fwd: [Ilug-cal-discuss] Linux sys_prctl LKM based hotfix]
by Baishampayan Ghose 13 Jul '06

13 Jul '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello! Forwarded message included. Regards, BG - -------- Original Message -------- Subject: [Ilug-cal-discuss] Linux sys_prctl LKM based hotfix Date: Thu, 13 Jul 2006 06:01:38 +0000 From: Abhisek Datta <abhisek.datta(a)gmail.com> Hello, Recently a critical vulnerability/behavioural flaw has been discovered in sys_prctl() in kernel/sys.c in Linux kernel. Exploitation of this bug can lead a local attacker to gain root privileges on systems running a vulnerable version of the kernel. Original advisory from RedHat Security Team: http://rhn.redhat.com/errata/RHSA-2006-0574.html Attached (link provided) is a LKM based hotfix which should prevent exploitation of this bug using the publicly used techniques. This hotfix is not sufficiently tested for production level deployment. So please use at your own risk although trusted sources apart from myself has confirmed that this hotfix does work without any problem. Information related to this hotfix like how to use it and how can you test your system for this vulnerability can also be found in my blog: http://www.eos-india.net/abhisek/blog/linux_prctl-2006-07-12-23-31.html - -- It appears that this list doesnt allow .tar.gz attachments. So here is the link to the hotfix: http://www.freeshell.in/~abhisek/linux_prctl_lkm.tar.gz - -abhisek - -- Baishampayan Ghose <b.ghose(a)ubuntu.com> Ubuntu -- Linux for Human Beings http://www.ubuntu.com/ 1024D/86361B74 BB2C E244 15AD 05C5 523A 90E7 4249 3494 8636 1B74 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEtehFQkk0lIY2G3QRAvp7AJwOUuOf5NA9oXTJOKB/d5eU6+cU/wCgvY5a kOuwB5qGIlYQ7xQvmjmStbU= =bJWX -----END PGP SIGNATURE-----

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MTNL ADSL router
by Krishna Dagli/Krushna Dagli 13 Jul '06

13 Jul '06

Hello, Can anyone tell me which router will work best for MTNL TriBand and Linux? MTNL has provided following list on their website [http://mumbai.mtnl.net.in/triband/htm/tri_faq.htm#11] # D Link 502 T # Comtrend CT-564 # Westell A –90-30199-07 # Zyxel Prestige 660 H –61 # Erricsson HM410c # Xavi(7722+) I do not have any USB port on my home machine (its old celeron 550 machine), just ethernet. Thanks Krishna

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Linuxers July 2006