Created
October 14, 2021 12:22
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Force accept a RADIUS user, using FreeRADIUS and a custom module (UNLANG).
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# | |
# /etc/freeradius/policy.d/force_accept | |
# | |
# Force accept a user. | |
# | |
# Two scenarios: | |
# - the user does NOT exist in the database => trigger FORCE-ACCEPT-USERNAME-NOT-FOUND | |
# - the user does exist but password is incorrect => trigger FORCE-ACCEPT-PASSWORD-INCORRECT | |
# | |
# This can be implemented with two modules, called at different sections in the FreeRADIUS sequence. | |
# (This may also be implemented with a single module for refactoring concern.) | |
# | |
force_accept_username_not_found { | |
# | |
# MANDATORY: set Auth-Type to Accept. | |
# Optional: set Tmp-String-0 for logging purpose (used in radiusd.conf:msg_goodpass). | |
# | |
update control { | |
&Auth-Type := Accept | |
&Tmp-String-0 := "FORCE-ACCEPT-USERNAME-NOT-FOUND" | |
} | |
# | |
# Optional: add some attributes for the NAS. | |
# | |
update reply { | |
&Cisco-AVPair += "ip:vrf-id=FORCE-ACCEPT-USERNAME-NOT-FOUND-VRF" | |
&Cisco-AVPair += "ip:addr-pool=FORCE-ACCEPT-USERNAME-NOT-FOUND-POOL" | |
&Cisco-AVPair += "ip:ip-unnumbered=Loopback0" | |
} | |
# | |
# Optional: tell we updated some attributes (good practice). | |
# | |
updated | |
} | |
force_accept_password_incorrect { | |
# | |
# Optional: set Auth-Type to Accept (for refactoring concern if you prefer a single module). | |
# Optional: set Tmp-String-0 for logging purpose (used in radiusd.conf:msg_goodpass). | |
# | |
update control { | |
# &Auth-Type := Accept | |
&Tmp-String-0 := "FORCE-ACCEPT-PASSWORD-INCORRECT" | |
} | |
# | |
# RADIUS attributes from radreply are fetched BEFORE the authentication checking, | |
# so it may be needed to remove them and (optionally) to add some attributes for the NAS. | |
# | |
update reply { | |
# Remove | |
&Framed-IP-Address !* ANY | |
&Framed-IP-Netmask !* ANY | |
&Cisco-AVPair !* ANY | |
# Add | |
&Cisco-AVPair += "ip:vrf-id=FORCE-ACCEPT-PASSWORD-INCORRECT-VRF" | |
&Cisco-AVPair += "ip:addr-pool=FORCE-ACCEPT-PASSWORD-INCORRECT-POOL" | |
&Cisco-AVPair += "ip:ip-unnumbered=Loopback1" | |
} | |
# | |
# MANDATORY: "pap" and "chap" modules need "ok" status to be returned. | |
# | |
ok | |
} |
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Below an example of the module execution. Tested on FreeRADIUS version 3.0.21.
FreeRADIUS server log: