Best practices for redundant servers
nbk at sitadelle.com
Sat Nov 4 12:30:35 CET 2006
Aaron Paetznick wrote:
> I've been struggling with this problem for a couple of weeks, and I
> thought I'd pass it along to the mailing list. Basically I'm trying to
> answer the following question. Given multiple identical dedicated
> servers each running Linux and MySQL, how can I configure FreeRADIUS for
> maximum stability, reliability, and performance? The question, it
> seems, is not as easy as is sounds.
I've already setup FreeRADIUS on multiple redundant servers, but never
had the time to write a HOWTO. The main guideline is:
1. Use LVS in a "direct routing" setup to dispatch the RADIUS requests.
2. Use MySQL replication for the authorize database, so each FreeRADIUS
server connects to a local, read only database.
3. Use radsqlrelay for the accounting database, so the accounting data
is written to a central database without slowing down the RADIUS
servers. radsqlrelay is to be found in the FreeRADIUS source tarball,
you could read the "rlm_sql_log" and "radsqlrelay" manpages for more
More information about the Freeradius-Users