I've been trying to set a client secret with a trailing backslash and find myself confused by the results. I am running the Debian 9 provided freeradius 3.0.12 (freeradius-3.0.12+dfsg-5+deb9u1). Secret I want: asdf\ Attempts (failures): secret = asdf\ - Results in config parsing error secret = asdf\\ - Results in config parsing error secret = 'asdf\' - Results in config parsing error secret = "asdf\" - Results in config parsing error secret = 'asdf\\' - Results: asdf\\ secret = "asdf\\" - Results: asdf\\ Attempts (successes?) secret = "as\df" - Results: as\df secret = "as\\df" - Results: as\\df I expected the last of my failures to work per https://networkradius.com/doc/3.0.10/unlang/data_single.html but it seems only \' is treated as an escape sequence in the client secret. Is there any way to have a client secret with a trailing backslash, and as an extension, can I have the string literal \' in my secret? Thanks, Nathaniel