.:: a few thoughts on the subject by rob wright ::.

• Tracking system performance with sar
  (tags: linux sysadmin sar)
• Tracking system performance with SAR | Linux Box Admin
  (tags: linux sar sysadmin)

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• Virtual Private Networking
  Cisco VPN Client V4.8 and install instructions
  (tags: cisco vpn linux)

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I did the following to get the Cisco VPN Client V4.8 working on SuSE 9.2

1. Download and install the kernel source using YaST2
2. cd /usr/src/linux (or the location of your kernel source)
3. make mrproper
4. make cloneconfig
5. make prepare-all
6. Download and extract the VPN client software
7. Download the source patch for the VPN client (why patch?)
8. cd to the VPN client software directory (e.g. /tmp/vpnclient)
9. copy the patch to the vpnclient directory
10. patch < vpnclient-linux-4.7.00.0640-k9_kernel-2.6.14-1.1637_FC4.patch (you'll see 2 errors)
11. ./vpn_install and use all the defaults
12. Start the service:  /etc/init.d/vpnclient_init start
13. If you have a .pcf file, copy it to /etc/CiscoSystemsVPNClient/Profiles/
14. Connect by doing the following: vpnclient connect (do not include the .pcf extension)

References

• http://lists.opensuse.org/opensuse/2006-01/msg00854.html
• http://system.cs.fsu.edu/selfhelp/vpninfo/
• http://system.cs.fsu.edu/selfhelp/vpninfo/linvpn.php

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• ITM V6 Documentation
  (tags: Tivoli itm)

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• http://www.prairienet.org/~jtuttle/blog/item/59/
  Tunebite is an application that records the encrypted media at 4x speed by recording the output of the sound card while Windows Media Player plays the file. It isn’t a DRM crack, it doesn’t break the drm, and it doesn’t un-encrypt the NetLibrary file. It
  (tags: netlibrary)

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These are the steps that I followed to install QoS on OpenWRT (reference the QoSHowto)

1. ssh to your router (e.g. 192.168.1.1) and login as root
2. ipkg install http://downloads.openwrt.org/people/nbd/qos/qos-scripts_0.9.1-1_mipsel.ipk
3. cd /etc/config
4. vim qos
5. Added “5061″ to this line: option ports “22,53,5061″
6. qos-start
7. To check to see if it’s working: cat /proc/net/ip_conntrack |grep 192.168.1.192 (where 192.168.1.192 is the address of my Vonage router)

Output is

udp 17 174 xsrc=192.168.1.192 dst=69.59.252.36 sport=5061 dport=10000 xsrc=69.59.252.36 dst=66.169.7.152 sport=10000 dport=5061 [ASSURED] use=1 mark=1 l7proto=unknown

“mark=1″ indicates that the traffic is the highest priority.

More references: nbd’s QoS script and rudy’s QoS script

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• Asterisk on OpenWRT
  (tags: voip asterisk wrt54g)

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