Siavash's Website

tips:networking

siavash — Sun, 29 Apr 2012 16:29:57 +0430

Networking

iptables

sharing an internet connection

eth0: connected to internet

wlan0: local WLAN

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A INPUT -i wlan0 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward

Full NAT

iptables -t nat -A POSTROUTING -j MASQUERADE

MAC Address Filtering

Filter (Used with FORWARD here) all incoming traffic from wlan0 and outgoing to eth0 except the specified MAC address (can add more MACs using the same command)

iptables -P FORWARD DROP
iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i wlan0 -o eth0 -m mac --mac-source xx:xx:xx:xx:xx:xx -m state --state NEW -j ACCEPT

tips:oracle

siavash — Mon, 23 Apr 2012 12:54:05 +0430

Oracle

Query

List all tables

SELECT table_name FROM all_tables;

User Management

Creating Users

CREATE user siavash IDENTIFIED BY passw0rd;

only alphanumeric passwords are accepted!

Remote Connection Access

GRANT connecto TO siavash;

Grant on Tables

GRANT SELECT, UPDATE, DELETE ON some_table TO siavash;
GRANT SELECT ON other_table TO siavash;

tips

siavash — Thu, 22 Mar 2012 18:52:18 +0430

This is where I write some tips that I may need later, you may need them too

Tips

tips_oracle - created

siavash — Sat, 04 Feb 2012 16:48:56 +0430

Table management

List all tables

SELECT table_name FROM all_tables;

User management

User creation

CREATE USER siavash IDENTIFIED BY password;

User privileges

GRANT connect TO siavash;

GRANT SELECT, INSERT, UPDATE, DELETE ON wimax TO siavash;

blog:xfs_filesystem_support_in_veritas_cluster_server - created

siavash — Fri, 10 Jun 2011 18:18:35 +0430

XFS Filesystem Support in Veritas Cluster Server

Finally a blog post after more than 2 years!

I can't say I was too busy to update this but I was lazy

There is nothing much to say but I've been working for Huawei Technologies since last summer.

Ok, lets talk about the topic.

I was setting up several clusters recently and I formatted the storage using my favorite filesystem, XFS :) But the strange thing was that Veritas Cluster Server (We are using 4.1)was unable to mount the storage automatically! After reading the engine log file I found this error: “Unsupported filesystem!” wtf?

If you are an experienced linux user, you most probably know that the applications which run on linux are not dependent on the filesystem format, in other words you are free to use whatever filesystem you like. So my guess was that the guys at Symantec/Veritas Software don't like XFS.

As always I googled to find a solution but I failed to So my last change was to make VCS support my lovely filesystem. After greping for other supported filesystem names in /opt I found these configurations:

/opt/VRTSvcs/bin/Mount/functions.pl

my (@supported_fs) = ($default_fs, "ext2", "ext3", "nfs", "reiserfs");

/opt/VRTSvcs/bin/Mount/Mount.xml

            <attr_description>Type of file system.</attr_description>
            <possiblevalues>
                <value>vxfs</value>
                <value>ext2</value>
                <value>ext3</value>
                <value>nfs</value>
                <value>reiserfs</value>
            </possiblevalues>

So I edited both files to add “xfs”:

/opt/VRTSvcs/bin/Mount/functions.pl

my (@supported_fs) = ($default_fs, "ext2", "ext3", "nfs", "reiserfs", "xfs");

/opt/VRTSvcs/bin/Mount/Mount.xml

            <attr_description>Type of file system.</attr_description>
            <possiblevalues>
                <value>vxfs</value>
                <value>ext2</value>
                <value>ext3</value>
                <value>nfs</value>
                <value>reiserfs</value>
                <value>xfs</value>
            </possiblevalues>

Ta-da! Now everything works fine.

Don't forget to update these files on all cluster nodes in the group!

I'm not dead!, VCS, Veritas, Server, Cluster, XFS, Filesystem

contact

siavash — Fri, 18 Feb 2011 14:35:27 +0430

email:
- siavashs AT siavashs DOT org
- siavash.safi AT gmail DOT com

chat:
- gtalk:
  - siavash.safi AT gmail DOT com
- yahoo:
  - siavash.safi
- icq:
  - 587659422
- irc:
  - freenode, nickname Siavash, on #youki, #technotux, #tehlug and some other channels.
  - GIMPNet, nickname siavashs, on #c++, #clutter and #gtk+ channels.

about

siavash — Fri, 29 Oct 2010 09:14:01 +0430

My name is Siavash(Siyâvash) Safi. I'm a Free/Open Source software developer and sysadmin.

I'm work as a VAS Engineer for Huawei Technologies Co., Ltd. in Tehran, Iran.

navigation

siavash — Sat, 05 Jun 2010 20:06:40 +0430

home

siavash — Sat, 05 Jun 2010 20:05:33 +0430

Under construction!

The website is currently under construction.

friends

siavash — Wed, 14 Oct 2009 16:27:36 +0430

Friends (in alphabetic order):

tips:linux - created

siavash — Tue, 25 Aug 2009 19:27:07 +0430

panic=5

sarah.jpg

siavash — Wed, 25 Feb 2009 19:15:58 +0430

Siavash's Website

tips:networking

Networking

iptables

sharing an internet connection

Full NAT

MAC Address Filtering

tips:oracle

Oracle

Query

List all tables

User Management

Creating Users

Remote Connection Access

Grant on Tables

tips

Tips

tips_oracle - created

Table management

List all tables

User management

User creation

User privileges

blog:xfs_filesystem_support_in_veritas_cluster_server - created

XFS Filesystem Support in Veritas Cluster Server

contact

about

navigation

home

friends

tips:linux - created

Linux Kernel

Command Line

Panic

sarah.jpg