vpn access . What is the better?

HI AndresSalesa,

Unfortunately, we could not recommend based on your requirements and both IPSec and SSL are used widely and are security is dependent on each pro and cons .

SSL VPN products tend to provide more granular tools--how granular varies from product to product--but how you use them (and how much administrative cost you're prepared to shoulder) is up to you. Because they operate at the session layer, SSL VPNs can filter on and make decisions about user or group access to individual applications (ports), selected URLs, embedded objects, application commands and even content.

IPsec was originally designed to provide point-to-point, always-on connections between remote sites and the central office resource. The clients in this case could be branch offices or vendors. The protocol is designed to work further down the network stack (layer 3) and can be used to transmit any IP-based protocol, irrespective of the application generating the traffic. 

 Before you decide the two I would like you to go through the URL link for more information . 

http://searchsecurity.techtarget.com/tip/IPSec-VPN-vs-SSL-VPN-Comparing-respective-VPN-security-risks

As for the configuration , you may refer the links below 

Remote Access via SSL  VPN https://www.sophos.com/en-us/medialibrary/PDFs/documentation/utm90_Remote_Access_Via_SSL_geng.pdf

Remote access via IPsec https://www.sophos.com/en-us/medialibrary/PDFs/documentation/utm90_Remote_Access_Via_IPsec_geng.pdf

Remote Access via L2TP over IPsec https://www.sophos.com/en-us/medialibrary/PDFs/documentation/utm90_Remote_Access_Via_L2TP_geng.pdf

Thanks and regards 

Aditya Patel | Network and Security Engineer.

Agreed with Aditya.  If you have Active Directory, I would prefer the SSL VPN.  My second choice would be L2TP/IPsec using certs instead of a PSK.  Third would be L2TP/IPsec with a PSK.  Last choice would be IPsec because the well-supported clients are not free.

Cheers - Bob