TelExcell is a leading provider of wireless and security solutions in India, with over 20 years of experience working with ISPs. They have developed features for ISPs like VRRP, IPSEC, GRE, and VLANs. IPSEC can be used to create secure site-to-site tunnels between locations. It uses IKE phase 1 for key exchange and IKE phase 2 for data encryption. Netaxcess routers can be configured as IPSEC servers for remote sites to reduce costs compared to dedicated hardware. Larger customers may place IPSEC servers behind a firewall with public/private address translation for added security.