C[omp]ute

From: andrew cooke <andrew@...>

Date: Sun, 27 Mar 2016 17:09:05 -0300

I thought I had documented this, but when I went to install on a new machine I
couldn't find it.  So maybe I copied it all from somewhere else.  Anyway,
here's what I did:

 * Install ppp related packages

 * Create a network device in yast that exists but is not associated with an
   IP address (neither indeirectly nor via dhcp).

 * Check that connecting the ethernet cable from the modem is logged correctly
   (link up) for that device (so you know you have the right ethernet port).

 * In /etc/ppp:

   * Add "hostname" = "password" (not literally) to both pap-secrets and
     chap-secrets (I don't know which is correct).

   * Modify ETH=... in pppoe.conf to be the device created above (eth0).

   * Create peers/movistar (or whatever your ISP is called) with the
     contents

#
# PPP over Ethernet options (using roaring pinguin plugin)
#
plugin rp-pppoe.so

eth0
user hostname
defaultroute
replacedefaultroute
usepeerdns
idle 0
maxfail 0
persist
passive

# pppoe has a lower mtu/mru
mtu 1492
mru 1492
# switch off all compressions (this is a must)
nopcomp
# this is recommended
novjccomp
noccp

   * Create ip-up (with executable bit set):

#!/bin/bash

{
    echo "INTERFACE='$IFNAME'"
    echo "IPADDR='$IPLOCAL'"
    echo "PTPADDR='$IPREMOTE'"
    echo "DNSSERVERS='$DNS1 $DNS2'"
} | /sbin/netconfig modify -s pppd -i "$IPNAME"

/etc/sysconfig/network/scripts/firewall try-restart

   * Create ip-down (with executable bit set):

#!/bin/bash

/sbin/netconfig remove -s pppd -i "$IPNAME"

/etc/sysconfig/network/scripts/firewall try-restart

 * Create /etc/systemd/system/ppp@...

[Unit]
Description=PPP link to %I
Documentation=man:pppd(8)
After=network-pre.target network.service SuSEfirewall2_init.service
Before=network.target multi-user.target shutdown.target SuSEfirewall2.service

[Service]
Type=forking
PIDFile=/var/run/ppp-%I.pid
ExecStart=/usr/sbin/pppd call %I linkname %I updetach nolog
ExecReload=/usr/bin/kill -s HUP $MAINPID
Restart=always
SuccessExitStatus=1
RestartPreventExitStatus=3 4 5

[Install]
WantedBy=network-online.target multi-user.target

 * Create /etc/systemd/system/network-online.target.wants/ppp@...

[Unit]
Description=PPP link to %I
Documentation=man:pppd(8)
After=network-pre.target network.service SuSEfirewall2_init.service
Before=network.target multi-user.target shutdown.target SuSEfirewall2.service

[Service]
Type=forking
PIDFile=/var/run/ppp-%I.pid
ExecStart=/usr/sbin/pppd call %I linkname %I updetach nolog
ExecReload=/usr/bin/kill -s HUP $MAINPID
Restart=always
SuccessExitStatus=1
RestartPreventExitStatus=3 4 5

[Install]
WantedBy=network-online.target multi-user.target

 * Create /etc/systemd/system/multi-user.target.wants/ppp@...

[Unit]
Description=PPP link to %I
Documentation=man:pppd(8)
After=network-pre.target network.service SuSEfirewall2_init.service
Before=network.target multi-user.target shutdown.target SuSEfirewall2.service

[Service]
Type=forking
PIDFile=/var/run/ppp-%I.pid
ExecStart=/usr/sbin/pppd call %I linkname %I updetach nolog
ExecReload=/usr/bin/kill -s HUP $MAINPID
Restart=always
SuccessExitStatus=1
RestartPreventExitStatus=3 4 5

[Install]
WantedBy=network-online.target multi-user.target

And then:

  systemctl enable ppp@...
  systemctl start ppp@...

Note that /usr/share/doc.packages/ppp/SETUP has much useful information.

I think I also had to set the DNS server somewhere, so something above isn't
quite right.  But it works...

In the past I've had issues with the connection dropping and not restarting.
To hack that, I have used this script, run as a cron joib for root (every
minute, say...):

#!/bin/bash

log="/var/log/dsl-check.log"

touch "$log"

exists=`/sbin/ifconfig ppp0 | grep "inet addr"`
if [ ! "$exists" ]
then
  date >> "$log"
  systemctl restart ppp@...
  rm -f /tmp/getmail*.lock
fi

(but you probably don't want to clean out getmail locks from tmp!)

Andrew