OneSpan Authentication Server Appliance supports the following RADIUS protocols:
PAP
CHAP
MSCHAP with MPPE (Microsoft Point-to-Point Encryption)
MSCHAP2 with MPPE
EAP-TTLSv0/PAP
PEAPv0/EAP-GTC
PEAPv1/EAP-GTC
Some protocols do not support all authentication features of OneSpan Authentication Server Appliance (see Limitations of RADIUS support in OneSpan Authentication Server Appliance). For more information, see Login permutations.