The ProL2TP daemons can be queried using CLI utilities.
In this section, we explain how these can be used to query status.
The prol2tpd daemon is usually managed with the Linux system's init subsystem.
Most Linux distributions have converged on using systemd, but some use alternatives, e.g. upstart and rc-sysvinit. The service command wraps these, and can be used to determine whether prol2tpd is running:
root@lns:~# service prol2tp status ● prol2tp.service - ProL2TP L2TPv2/L2TPv3 network protocol daemon Loaded: loaded (/lib/systemd/system/prol2tp.service; disabled; vendor preset: Active: active (running) since Thu 2018-11-29 11:45:30 UTC; 6min ago Process: 12245 ExecStart=/usr/sbin/prol2tpd $PROL2TPD_OPTIONS (code=exited, status=0/SUCCESS) Process: 12238 ExecStartPre=/bin/sh -c modprobe -q -a $MODULES || true (code=exited, status=0/SUCCESS) Main PID: 12246 (prol2tpd) Tasks: 6 Memory: 1.9M CPU: 232ms CGroup: /system.slice/prol2tp.service ├─12246 /usr/sbin/prol2tpd -d -o /var/log/prol2tpd.log └─12251 /usr/sbin/prol2tp-scriptd -f
It is also possible to query prol2tpd state directly using the prol2tp tool. The
show system command summarises the current state and shows some configuration values that may be derived, for example the hostname and the router id value used for L2TPv3:
root@lns:~# prol2tp show system ProL2TP V2.0.0 (c) Copyright 2004-2019 Katalix Systems Ltd. L2TP configuration: listening on: 192.168.211.10:1701 hostname: jackdaw router id: 3232235848 log level: NOTICE L2TP service status: tunnels: 1, sessions: 3
To obtain lists of tunnels, use the
show tunnels command.
root@lns:~# prol2tp show tunnels TunId Name State Time Peer N 27774 - UP 00:41:50 192.168.211.20
In this example, there is one tunnel, assigned id 27774.
The 'N' in the first column indicates it is a net instance, that is, it is created by a network request. The L2TP peer is 192.168.211.20, which is our LAC. The tunnel doesn't have a name because it is created by the network.
Details of any tunnel can be seen with the
show tunnel command.
root@lns:~# prol2tp show tunnel id 27774 Tunnel 27774 from 192.168.211.25:20142 to 192.168.211.20:1962 created at: Nov 29 11:56:36 2018 origin: net tunnel mode: LNS version: L2TPv2 encapsulation: UDP state: ESTABLISHED time since state change: 00:02:26 number of sessions: 3 log level: INFO local tunnel id: 27774 transport ns: 4 transport nr: 10 transport cwnd: 5 transport ssthres: 10 transport tx window: 10 tunnel profile name: lac1 peer tunnel id: 24377 peer host name: lac peer vendor name: prol2tp 1.8.6 Linux-4.4.0-139-generic (x86_64)
For more details refer to the prol2tp man page.
Sessions can be listed with the
show sessions command.
root@lns:~# prol2tp show sessions TunId SessId TunName SessName Type State Time Identifier N 27774 34877 - - PPP UP 00:41:49 firstname.lastname@example.org N 27774 2129 - - PPP UP 00:41:49 email@example.com N 27774 57634 - - PPP UP 00:41:49 firstname.lastname@example.org
With L2TPv2, sessions are assigned 16-bit ids, scoped by the tunnel in which they are created. The session list shows the assigned ID of the session and its tunnel.
show tunnels output, the 'N' in the first column indicates that a session is created by a network request.
For PPP sessions, the Identifier column shows the PPP username, if known.
root@lcce1:~# prol2tp show sessions TunId SessId TunName SessName Type State Time Identifier C 2008991623 762631622 one one ETH UP 00:00:02 demo-l2tpv3-eth-1
With L2TPv3, tunnel and session ids are 32-bit values.
For L2TPv3 ethernet/VLAN pseudowires, the Identifier column shows the session's L2TPv3 Remote End ID. A 'C' in the first column indicates taht a session was created by a local request based on the prol2tpd config file.
Details of a session instance are shown using the
show session command. If the optional
stats keyword is used, the output includes dataplane statistics.
Sessions are identified by their id and their parent tunnel's id.
root@lns:~# prol2tp show session id 34877 in tunnel id 27774 stats Session 34877 on tunnel 27774: created at: Nov 29 11:56:36 2018 state: ESTABLISHED origin: net time since state change: 00:04:24 pseudowire type: PPP log level: INFO tunnel id: 27774 session id: 34877 peer session id: 42991 session profile name: lac pseudowire profile name: ppp data tx pkts/bytes/errors: 19 / 575 / 0 data rx pkts/bytes/errors: 18 / 404 / 0 data rx oos pkts/discards: 0 / 0
For more details refer to the prol2tp man page.
Like prol2tpd, the propppd daemon is managed by the system's init subsystem.
root@lns:~# service proppp status ● proppp.service - ProPPP Scalable PPP network protocol daemon Loaded: loaded (/lib/systemd/system/proppp.service; disabled; vendor preset: Active: active (running) since Thu 2018-11-29 11:45:30 UTC; 7min ago Process: 12200 ExecStart=/usr/sbin/propppd $PROPPPD_OPTIONS (code=exited, status=0/SUCCESS) Main PID: 12204 (propppd) Tasks: 5 Memory: 1.6M CPU: 134ms CGroup: /system.slice/proppp.service └─12204 /usr/sbin/propppd -d -l /var/log/propppd.log
It is also possible to query propppd directly using the propppctl tool. The
propppctl status command shows a status summary:
root@lns:~# propppctl status ProPPP v2.0.0 support: email@example.com License: unlicensed PPP: ppp instance count: 3 create requests: 3, failures: 0 destroy requests: 0, failures: 0 RADIUS: access requests: 3, accepts: 3, rejects: 0, challenges: 0 accounting starts: 3, stops: 0, updates: 21, responses: 24 disconnect requests: 0, responses: 0 retransmits: 0, timeouts: 0 auth requests in progress: 0, accounting requests in progress: 0 Events: created: 3, destroyed: 0, up: 3, down: 0 Config: config updates: 1, failures: 0
To obtain a list of PPP sessions, use the
propppctl list command.
root@lns:~# propppctl list Name Interface Duration State User session-1 ppp0 0:08:07 UP firstname.lastname@example.org session-2 ppp1 0:08:07 UP email@example.com session-3 ppp2 0:08:07 UP firstname.lastname@example.org
It is possible to filter the list to show only PPP instances that are either up or down.
root@lns:~# propppctl list down Name Interface Duration State User root@lns:~# propppctl list up Name Interface Duration State User session-1 ppp0 0:08:21 UP email@example.com session-2 ppp1 0:08:21 UP firstname.lastname@example.org session-3 ppp2 0:08:21 UP email@example.com
Details of a session are displayed with the
propppctl show command.
root@lns:~# propppctl show session-1 interface name: ppp0 created: 2018-11-29 11:56:39 type: PPPoL2TP debug: 7 connect delay: 1000 state: RUNNING connect time: 8.7 minutes link mtu: 1500, peer mru: 1500 run count: 84 lcp: echo interval: 30, max echo failures: 0 next echo: 18 want: pap chap eap asyncmap magic mru pcomp accomp got: pap chap asyncmap magic mru pcomp accomp allow: chap eap asyncmap magic mru pcomp accomp his: asyncmap magic pcomp accomp state: OPENED timeout: 3 max confreqs: 10, max termreqs: 2 retransmits: 10, naks: 0 naks since last ack: 0 ccp: want: bsd deflate got: bsd deflate allow: bsd deflate predictor1 his: bsd deflate state: OPENED timeout: 3 max confreqs: 10, max termreqs: 2 retransmits: 10, naks: 0 naks since last ack: 0 ipcp: want: negaddr reqaddr got: negaddr reqaddr allow: negaddr proxyarp his: negaddr state: OPENED timeout: 3 max confreqs: 10, max termreqs: 2 retransmits: 10, naks: 0 naks since last ack: 0 local ip: 10.5.1.100 peer ip: 10.5.1.1 pap: auth timeout: 30, retransmit interval: 3 our state: CLOSED, peer state: CLOSED chap: timeout: 3, rechallenge time: 0 local state: lowerup started done transmits: 1 peer state: lowerup eap: local: state: Closed requests: 0, responses: 0 timeout: 3, max requests: 10 peer: state: Closed requests: 0, responses: 0 timeout: 20, max requests: 20 radius: status: AUTH_CHAP_ACK acct updates: 8 auth: remote name: 'firstname.lastname@example.org' config: local: , peer: done: local: chap, peer: pppol2tp: protocol version: L2TPv2 (LNS) id: 27774/2129 peer id: 24377/57566
For more details refer to the propppctl man page.
As with prol2tpd and propppd, proacd is managed by the system's init subsystem.
root@lac~# service proac status ● proac.service - ProL2TP Access Concentrator network protocol daemon Loaded: loaded (/lib/systemd/system/proac.service; enabled; vendor preset: enabled) Active: active (running) since Thu 2019-10-17 19:00:49 UTC; 5min ago Main PID: 14851 (proacd) CGroup: /system.slice/proac.service └─14851 /usr/sbin/proacd -o /var/log/proacd.log
It is also possible to query proacd directly using the proac_info tool. Passing the
-s argument displays a summary of system state:
root@lac:~# proac_info -s Routing: Routes created: 6 Route create failures: 0 Insufficient license denials: 0 Routes deleted: 4 Route delete failures: 0 Destination open failures: 4 Destination close failures: 0 Source close failures: 0 Routes closed by destination: 0 Routes closed by source: 2 PPPoE: PADI received: 4 Invalid PADI received: 0 PADO sent: 4 PADR received: 4 Invalid PADR received: 0 Resent PADR received: 0 PADS sent: 4 PADT received: 2 Invalid PADT received: 0 PADT sent: 2 L2TP: Tunnels opened: 3 Sessions opened: 2 Sessions closed: 0 DNS lookup failures: 0 RADIUS: Successful requests: 3 Failed requests: 0 DNS lookup failures: 0 Server timeouts: 0 PPPD: Local pppd started: 0 Local pppd terminated: 0 Exit codes: OK: 0 Fatal error: 0 Option error: 0 No kernel support: 0 User request: 0 Connect failed: 0 Option 'pty' command failed: 0 Negotiation failed: 0 Peer failed to authenticate: 0 Idle timeout: 0 Connect time exceeded: 0 Peer dead: 0 Hangup: 0 Init failed: 0 Failed to authenticate with peer: 0 Other: 0
A list of all the routes currently instantiated in proacd can be displayed using proac_info using the
root@lac:~# proac_info -r Route 'r2' 13564: Source : PPPoE interface enp0s8 session 5051 service name 'dynamic' (advertised) peer MAC 08:00:27:4E:71:75 Destination: L2TP tunnel 35352 session 41053 Route 'r1' 33975: Source : PPPoE interface enp0s8 session 15932 service name 'static' (advertised) peer MAC 08:00:27:64:4A:2B Destination: L2TP tunnel 64947 session 32602
If the system has many instantiated routes, proac_info can select just one of them using either the route name or route ID rather than showing the full list:
root@lac:~# proac_info -r 33975 Route 'r1' 33975: Source : PPPoE interface enp0s8 session 15932 service name 'static' (advertised) peer MAC 08:00:27:64:4A:2B Destination: L2TP tunnel 64947 session 32602 root@lac:~# proac_info -r r1 Route 'r1' 33975: Source : PPPoE interface enp0s8 session 15932 service name 'static' (advertised) peer MAC 08:00:27:64:4A:2B Destination: L2TP tunnel 64947 session 32602
For more details refer to the proac_info man page.
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