Deprecated: Return type of Requests_Cookie_Jar::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /www/webvol14/so/emm9jypq7227iqw/linuxkitchen.com/public_html/wp-includes/Requests/Cookie/Jar.php on line 63

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Deprecated: Return type of Requests_Utility_CaseInsensitiveDictionary::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /www/webvol14/so/emm9jypq7227iqw/linuxkitchen.com/public_html/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php on line 40

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Deprecated: Return type of Requests_Utility_CaseInsensitiveDictionary::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /www/webvol14/so/emm9jypq7227iqw/linuxkitchen.com/public_html/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php on line 82

Deprecated: Return type of Requests_Utility_CaseInsensitiveDictionary::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /www/webvol14/so/emm9jypq7227iqw/linuxkitchen.com/public_html/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php on line 91
VPN server na CentOS 6U4 – Linux, Windows, Heklanje, Kuhinja

VPN = Virtual Private Network, i služi da se sigurno logujete u svoju privatnu mrežu.
Opšte objašnjenje se može naći ovde.

Koje sve mogućnosti postoje :
IPSec – podržava ga Red Hat, jedan od privih SW za ovako nešto, prilično komplikovan
OpenVPN – spada u L2TP, free je, postoji free klijentska aplikacija za Android uređaje (link). HomePage. Odlično i jednostavno objašnjenje se može naći ovde.
PPTP – Point-to-Point Tunneling Protocol (there are mainly 3 types of VPN servers: Point-to-Point Tunneling Protocol (PPTP), Layer 2 Tunneling Protocol (L2TP) and OpenVPN). PPTP is supported natively on almost all devices, Windows, Linux, Android, IOS and Mac OS.
FreeSwan – koristi IPSec

Neki dodatni pojmovi :
TUN – to je virtuelni mrežni interfejs koji operativnom sistemu izgleda kao point-to-point mreža, npr T1 linija. Ali umesto u mrežu tun gura bitove ka korisničkom prostoru, gde korisnički program može da otvori tun device kao bilo koji fajl i pročita/upiše u njega IP pakete.
TAP – interfejs je sličan kao TUN, samo što on imitira ethernet a ne P-t-P

Kako OpenVPN radi :
IP->UDP->SSH—>TUN/TAP interfejs————–>TUN/TAP interfejs na drugoj mašini
Pošto IP sadrži TCP layer, enkapsulacija u UDP ne dodaje nepotreban overhead, a enkapsulacija u SSH dodaje security

By velda