Ok, so I have run the four commands:
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service ipsec start
service xl2tpd start
ipsec auto --up Work
xl2tpd-control connect Work
The first three are all ok. The fourth just gives me the command prompt without any output.
I wait a few seconds, then enter
ip a. No ppp0 ip address.
The relevant bit of the /var/log/messages file says this:
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Jun 28 11:00:53 HOSTNAME kernel: PPP generic driver version 2.4.2
Jun 28 11:00:53 HOSTNAME kernel: NET: Registered protocol family 24
Jun 28 11:00:53 HOSTNAME kernel: PPPoL2TP kernel driver, V1.0
Jun 28 11:01:04 HOSTNAME kernel: padlock: VIA PadLock not detected.
Jun 28 11:01:04 HOSTNAME kernel: padlock: VIA PadLock Hash Engine not detected.
Jun 28 11:01:04 HOSTNAME kernel: cryptd: max_cpu_qlen set to 100
Jun 28 11:01:04 HOSTNAME kernel: alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni)
Jun 28 11:01:04 HOSTNAME kernel: padlock: VIA PadLock not detected.
Jun 28 11:01:04 HOSTNAME kernel: sha512_ssse3: Using AVX optimized SHA-512 implementation
Jun 28 11:01:04 HOSTNAME kernel: NET: Registered protocol family 15
Jun 28 11:01:04 HOSTNAME kernel: alg: No test for cipher_null (cipher_null-generic)
Jun 28 11:01:04 HOSTNAME kernel: alg: No test for ecb(cipher_null) (ecb-cipher_null)
Jun 28 11:01:04 HOSTNAME kernel: alg: No test for digest_null (digest_null-generic)
Jun 28 11:01:04 HOSTNAME kernel: alg: No test for compress_null (compress_null-generic)
Jun 28 11:01:04 HOSTNAME kernel: alg: No test for fips(ansi_cprng) (fips_ansi_cprng)
Jun 28 11:01:12 HOSTNAME xl2tpd[3702]: setsockopt recvref[30]: Protocol not available
Jun 28 11:01:12 HOSTNAME xl2tpd[3702]: Using l2tp kernel support.
Jun 28 11:01:12 HOSTNAME xl2tpd[3703]: xl2tpd version xl2tpd-1.3.8 started on vec1503 PID:3703
Jun 28 11:01:12 HOSTNAME xl2tpd[3703]: Written by Mark Spencer, Copyright (C) 1998, Adtran, Inc.
Jun 28 11:01:12 HOSTNAME xl2tpd[3703]: Forked by Scott Balmos and David Stipp, (C) 2001
Jun 28 11:01:12 HOSTNAME xl2tpd[3703]: Inherited by Jeff McAdams, (C) 2002
Jun 28 11:01:12 HOSTNAME xl2tpd[3703]: Forked again by Xelerance (www.xelerance.com) (C) 2006-2016
Jun 28 11:01:12 HOSTNAME xl2tpd[3703]: Listening on IP address 0.0.0.0, port 1701
Jun 28 11:01:21 HOSTNAME kernel: alg: No test for authenc(hmac(sha1),cbc(aes)) (authenc(hmac(sha1-generic),cbc-aes-aesni))
Jun 28 11:01:28 HOSTNAME NetworkManager[2485]: <info> (eth0): supplicant connection state: completed -> group handshake
Jun 28 11:01:28 HOSTNAME NetworkManager[2485]: <info> (eth0): supplicant connection state: group handshake -> completed
Jun 28 11:01:41 HOSTNAME xl2tpd[3703]: Connecting to host WORKIPADDRESS, port 1701
Jun 28 11:02:12 HOSTNAME xl2tpd[3703]: Maximum retries exceeded for tunnel 53070. Closing.
Jun 28 11:02:12 HOSTNAME xl2tpd[3703]: Connection 0 closed to WORKIPADDRESS, port 1701 (Timeout)
Jun 28 11:02:43 HOSTNAME xl2tpd[3703]: Will redial in 30 seconds
Jun 28 11:03:13 HOSTNAME xl2tpd[3703]: Connecting to host WORKIPADDRESS, port 1701
Jun 28 11:03:44 HOSTNAME xl2tpd[3703]: Maximum retries exceeded for tunnel 20799. Closing.
Jun 28 11:03:44 HOSTNAME xl2tpd[3703]: Connection 0 closed to WORKIPADDRESS, port 1701 (Timeout)
Jun 28 11:04:15 HOSTNAME xl2tpd[3703]: Will redial in 30 seconds
Jun 28 11:04:45 HOSTNAME xl2tpd[3703]: Connecting to host WORKIPADDRESS, port 1701
Jun 28 11:05:10 HOSTNAME pulseaudio[3019]: ratelimit.c: 25 events suppressed
Jun 28 11:05:16 HOSTNAME xl2tpd[3703]: Maximum retries exceeded for tunnel 58600. Closing.
Jun 28 11:05:16 HOSTNAME xl2tpd[3703]: Connection 0 closed to WORKIPADDRESS, port 1701 (Timeout)
Jun 28 11:05:48 HOSTNAME xl2tpd[3703]: Will redial in 30 seconds
Jun 28 11:06:18 HOSTNAME xl2tpd[3703]: Connecting to host WORKIPADDRESS, port 1701
Jun 28 11:06:25 HOSTNAME xl2tpd[3703]: Connection established to WORKIPADDRESS, 1701. Local: 10490, Remote: 14 (ref=0/0).
Jun 28 11:06:25 HOSTNAME xl2tpd[3703]: Calling on tunnel 10490
Jun 28 11:06:25 HOSTNAME xl2tpd[3703]: Call established with WORKIPADDRESS, Local: 22307, Remote: 949, Serial: 1 (ref=0/0)
Jun 28 11:06:25 HOSTNAME pppd[3751]: Warning: can't open options file /root/.ppprc: Permission denied
Jun 28 11:06:25 HOSTNAME pppd[3751]: Plugin pppol2tp.so loaded.
Jun 28 11:06:25 HOSTNAME xl2tpd[3703]: control_finish: Connection closed to WORKIPADDRESS, serial 1 ()
Jun 28 11:06:55 HOSTNAME xl2tpd[3703]: Calling on tunnel 10490
Jun 28 11:07:26 HOSTNAME xl2tpd[3703]: Maximum retries exceeded for tunnel 10490. Closing.
Jun 28 11:07:26 HOSTNAME xl2tpd[3703]: Connection 14 closed to WORKIPADDRESS, port 1701 (Timeout)
Jun 28 11:07:56 HOSTNAME xl2tpd[3703]: Calling on tunnel 10490
Jun 28 11:08:27 HOSTNAME xl2tpd[3703]: Connecting to host WORKIPADDRESS, port 1701
Jun 28 11:08:58 HOSTNAME xl2tpd[3703]: Maximum retries exceeded for tunnel 34609. Closing.
Jun 28 11:08:58 HOSTNAME xl2tpd[3703]: Connection 0 closed to WORKIPADDRESS, port 1701 (Timeout)
Jun 28 11:09:29 HOSTNAME xl2tpd[3703]: Will redial in 30 seconds
Jun 28 11:09:59 HOSTNAME xl2tpd[3703]: Connecting to host WORKIPADDRESS, port 1701
Jun 28 11:10:30 HOSTNAME xl2tpd[3703]: Maximum retries exceeded for tunnel 24769. Closing.
Jun 28 11:10:30 HOSTNAME xl2tpd[3703]: Connection 0 closed to WORKIPADDRESS, port 1701 (Timeout)
Jun 28 11:11:01 HOSTNAME xl2tpd[3703]: Will redial in 30 seconds
Jun 28 11:11:28 HOSTNAME NetworkManager[2485]: <info> (eth0): supplicant connection state: completed -> group handshake
Jun 28 11:11:28 HOSTNAME NetworkManager[2485]: <info> (eth0): supplicant connection state: group handshake -> completed
Jun 28 11:11:31 HOSTNAME xl2tpd[3703]: Connecting to host WORKIPADDRESS, port 1701
Jun 28 11:11:31 HOSTNAME xl2tpd[3703]: Connection established to WORKIPADDRESS, 1701. Local: 2629, Remote: 14 (ref=0/0).
Jun 28 11:11:31 HOSTNAME xl2tpd[3703]: Calling on tunnel 2629
Jun 28 11:11:31 HOSTNAME xl2tpd[3703]: Call established with WORKIPADDRESS, Local: 28665, Remote: 955, Serial: 4 (ref=0/0)
Jun 28 11:11:31 HOSTNAME pppd[5607]: Warning: can't open options file /root/.ppprc: Permission denied
Jun 28 11:11:31 HOSTNAME pppd[5607]: Plugin pppol2tp.so loaded.
Jun 28 11:11:31 HOSTNAME pppd[5607]: pppd 2.4.5 started by USER, uid 0
Jun 28 11:11:31 HOSTNAME pppd[5607]: Using interface ppp0
Jun 28 11:11:31 HOSTNAME pppd[5607]: Connect: ppp0 <-->
Jun 28 11:11:31 HOSTNAME pppd[5607]: Overriding mtu 1500 to 1410
Jun 28 11:11:31 HOSTNAME pppd[5607]: Overriding mru 1500 to mtu value 1410
Jun 28 11:11:31 HOSTNAME xl2tpd[3703]: control_finish: Connection closed to WORKIPADDRESS, serial 4 ()
Jun 28 11:11:31 HOSTNAME pppd[5607]: Terminating on signal 15
Jun 28 11:11:37 HOSTNAME pppd[5607]: Connection terminated.
Jun 28 11:11:37 HOSTNAME pppd[5607]: Modem hangup
Jun 28 11:11:37 HOSTNAME pppd[5607]: Exit.
There is also an xl2tpd logfile specified in /etc/ppp/options.l2tpd.client . Here is a sample (which keeps repeating, but the channel number and the magic number keep changing):
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using channel 92
Using interface ppp0
Connect: ppp0 <-->
Overriding mtu 1500 to 1410
PPPoL2TP options: debugmask 0
Overriding mru 1500 to mtu value 1410
sent [LCP ConfReq id=0x1 <mru 1410> <asyncmap 0x0> <magic 0x834f9b6c>]
Terminating on signal 15
sent [LCP TermReq id=0x2 "User request"]
Modem hangup
Connection terminated.
Is there anywhere else I should be looking?