rp-l2tpd crashes with SIGSEGV as soon as a tunnel setup is attempted. Building with system MD5 (from -lmd) instead of the built-in MD5 code makes things work. Reproducible: Always Steps to Reproduce: 1. start rp-l2tpd in debug, foreground mode # /usr/sbin/rp-l2tpd -d 255 -f 2. establish tunnel (config, secret in /etc/rp-l2tp/rp-l2tpd.conf) # /usr/sbin/rp-l2tpd-control "start-session 10.0.0.1" 3. see lptpd crash # /usr/sbin/rp-l2tpd -d 255 -f 0.000 l2tp_peer_find(10.0.0.1) examining peer 10.0.0.1/32 0.000 l2tp_peer_find(10.0.0.1) found 10.0.0.1/32 0.000 tunnel_new() -> 37129/0 0.000 auth_gen_response(secret=MySecret) -> 8608e49b000000000000000000000000 Segmentation fault Actual Results: l2tpd crash Expected Results: establish tunnel to named LNS rp-l2tp-0.4 brings its own "md5.c" - if you remove that from compilation, change auth.c + dgram.c to include <sys/types.h> + <md5.h>, and add -lmd to EXTRA_LIBS in Makefile it will connect fine. (As a side note: as there is no dependency to "pppd", it will still not work as-installed, without adding N_HDLC and SYNCPPP to kernel + installing net-dialup/pppd but that is a different bug)
