к сожалению в 1.5.0 так и не подключаются роутеры zyxel по l2tp:
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:52:06.883401 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 127)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=0,Nr=0 *MSGTYPE(SCCRQ) *PROTO_VER(1.0) *FRAMING_CAP(AS) *BEARER_CAP() FIRM_VER(256) HOST_NAME((none)) *VENDOR_NAME(l2tpd.org) *ASSND_TUN_ID(6) *RECV_WIN_SIZE(4)
10:52:07.879200 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 127)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=0,Nr=0 *MSGTYPE(SCCRQ) *PROTO_VER(1.0) *FRAMING_CAP(AS) *BEARER_CAP() FIRM_VER(256) HOST_NAME((none)) *VENDOR_NAME(l2tpd.org) *ASSND_TUN_ID(6) *RECV_WIN_SIZE(4)
10:52:08.882268 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 127)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=0,Nr=0 *MSGTYPE(SCCRQ) *PROTO_VER(1.0) *FRAMING_CAP(AS) *BEARER_CAP() FIRM_VER(256) HOST_NAME((none)) *VENDOR_NAME(l2tpd.org) *ASSND_TUN_ID(6) *RECV_WIN_SIZE(4)
10:52:09.879892 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 127)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=0,Nr=0 *MSGTYPE(SCCRQ) *PROTO_VER(1.0) *FRAMING_CAP(AS) *BEARER_CAP() FIRM_VER(256) HOST_NAME((none)) *VENDOR_NAME(l2tpd.org) *ASSND_TUN_ID(6) *RECV_WIN_SIZE(4)
10:52:10.879178 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 127)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=0,Nr=0 *MSGTYPE(SCCRQ) *PROTO_VER(1.0) *FRAMING_CAP(AS) *BEARER_CAP() FIRM_VER(256) HOST_NAME((none)) *VENDOR_NAME(l2tpd.org) *ASSND_TUN_ID(6) *RECV_WIN_SIZE(4)
10:52:11.882250 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 73)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=1,Nr=0 *MSGTYPE(StopCCN) *ASSND_TUN_ID(6) *RESULT_CODE(1/0 Timeout)
10:52:12.879144 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 73)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=1,Nr=0 *MSGTYPE(StopCCN) *ASSND_TUN_ID(6) *RESULT_CODE(1/0 Timeout)
10:52:13.879122 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 73)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=1,Nr=0 *MSGTYPE(StopCCN) *ASSND_TUN_ID(6) *RESULT_CODE(1/0 Timeout)
10:52:14.879109 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 73)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=1,Nr=0 *MSGTYPE(StopCCN) *ASSND_TUN_ID(6) *RESULT_CODE(1/0 Timeout)
10:52:15.879124 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 73)
172.29.1.32.1701 > 172.29.0.37.1701: [udp sum ok] l2tp:[TLS](0/0)Ns=1,Nr=0 *MSGTYPE(StopCCN) *ASSND_TUN_ID(6) *RESULT_CODE(1/0 Timeout)
т.е. accel-ppp вообще игнорирует запросы...
windows подключается :
11:30:07.673015 IP 172.31.100.34.1701 > 172.29.0.37.1701: l2tp:[TLS](0/0)Ns=0,Nr=0 *MSGTYPE(SCCRQ) *PROTO_VER(1.0) *FRAMING_CAP(S) *BEARER_CAP() FIRM_VER(1537) *HOST_NAME(NONE) VENDOR_NAME(Microsoft) *ASSND_TUN_ID(1) *RECV_WIN_SIZE(8)