transparent proxy

squid dan iptable(REDIRECT(same host) atau DNAT(different ip))



squid config

http_port 3128 transparent
http_port 80 vhost

ref http://www.cyberciti.biz/tips/linux-setup-transparent-proxy-squid-howto.html

IPTABLES

  /sbin/iptables -t nat -A PREROUTING  -p tcp --dport 80 -j DNAT --to $squid_server:$squid_port

  # nat perlu jika gw dan squid berlainan host.

  /sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

*maklumat tambahan*

DNAT akan tukar dst ip dari gw ke squid, tapi src ip tetap dari client(browser). 

Jadi masalah, kerana bila squid reply sync ack, alamat packet adalah kepada client. 

Client tak tahu menahu, so tcp handshake tak berjaya.

vSphere, ESXi, vCenter

vSphere adalah suite(kombinasi pelbagai software). Macam Microsoft Suite, yg dalamnya ada word, excel, powerpoint etc.

ESX adalah server utk virtualization, boleh store vmImage

vSphere Client adalah console utk connect dan control ESX

vCenter server is similar to vSphere client but it’s a server with more power.

(contohnya nak cloning image)

ref:

http://www.mustbegeek.com/difference-between-vsphere-esxi-and-vcenter/

vpn with .ovpn file

sudo openvpn --config vpn-config.ovpn 

converting .p12 -> seperate cert

Ok, it seems that we have to update network-manager-openvpn package to the latest version so it can understand p12 files. But there is a fairly simple way to generate the 3 .pem files needed at the old version using the original .p12 file:

openssl pkcs12 -nocerts -in file.p12 -out priv_key.pem

openssl pkcs12 -nokeys -clcerts -in file.p12 -out user_cert.pem

openssl pkcs12 -nokeys -cacerts -in file.p12 -out ca_cert.pem


Then use these 3 files at the OpenVPN configuration, mine is working fine now. I do not know if openssl is installed by default at Lucid, but it is in the repositories.

otrs erd

ftp://ftp.otrs.org/pub/otrs/misc/

truecrypt

http://ubuntuhandbook.org/index.php/2013/08/install-truecrypt-with-indicator-ubuntu-1304/

INSTALL
1) sudo add-apt-repository ppa:stefansundin/truecrypt
2) sudo apt-get update; sudo apt-get install truecrypt




REMOVE

sudo apt-get remove truecrypt 

sudo apt-add-repository --remove ppa:stefansundin/truecrypt 

sudo apt-get update

ubuntu hidden menu @applet

windows+alt + mouse right click

in case nak tambah/remove applet

linux jadi wifi

http://dashohoxha.blogspot.com/2013/06/how-to-setup-wifi-access-point-on-ubuntu.html

test hostapd:
# hostapd -dd /etc/hostapd/hostapd.conf

above more better than below

http://blog.peacon.co.uk/ubuntu-13-04-server-wireless-access-point-hostapd-howto/