Hi all!

There is a problem with the ADSL internet connection at a certain company.
The connection breaks every 1 minute and its VERY annoying.
The ADSL modem is in bridge mode, the server is a Fedora linux system.

Here is how the /var/log/messages file looks like:

....
Jan 8 09:08:02 xxxxx adsl-stop: Killing pppd
Jan 8 09:08:02 xxxxx pppd[1874]: Terminating on signal 15
Jan 8 09:08:02 xxxxx pppd[1874]: Connect time 1.0 minutes. ---- this is always between 0.9 - 1.1 minutes
Jan 8 09:08:02 xxxxx pppd[1874]: Sent 182353 bytes, received 1068327 bytes.
Jan 8 09:08:02 xxxxx adsl-stop: Killing adsl-connect
Jan 8 09:08:05 xxxxx pppd[1874]: Connection terminated.
Jan 8 09:08:07 xxxxx pppd[2697]: pppd 2.4.3 started by root, uid 0
Jan 8 09:08:07 xxxxx pppd[2697]: Using interface ppp0
Jan 8 09:08:07 xxxxx pppd[2697]: Connect: ppp0 <--> /dev/pts/1
Jan 8 09:08:07 xxxxx pppoe[2698]: PPP session is 15766
Jan 8 09:08:08 xxxxx pppd[2697]: PAP authentication succeeded
Jan 8 09:08:09 xxxxx pppd[2697]: local IP address 89.122.149.41
Jan 8 09:08:09 xxxxx pppd[2697]: remote IP address 89.122.148.254
Jan 8 09:08:10 xxxxx pppd[1874]: Exit.
Jan 8 09:08:10 xxxxx pppoe[1903]: read (asyncReadFromPPP): Session 15736: Input/output error
Jan 8 09:08:10 xxxxx pppoe[1903]: Sent PADT
Jan 8 09:08:10 xxxxx snmpd[2078]: netsnmp_assert index == tmp failed if-mib/data_access/interface.c:468 _access_interface_ent
ry_save_name()
Jan 8 09:08:40 xxxxx snmpd[2078]: netsnmp_assert index == tmp failed if-mib/data_access/interface.c:468 _access_interface_ent
ry_save_name()

--- and starts again...........


Jan 8 09:09:01 xxxxx adsl-stop: Killing pppd
Jan 8 09:09:01 xxxxx pppd[2697]: Terminating on signal 15
Jan 8 09:09:01 xxxxx pppd[2697]: Connect time 0.9 minutes.
...

Thank you in advance!

Check your ADSL modem settings with your ISP - VCI VPI etc

Hello!

The source of the error is unbelievable
The previous administrator of the server put a script in crontab that was pinging the server ip in every minute. If there was no ip it meant that there was an ADSL diconnect so the script did a network restart (however this was useless since the ppd daemon does something similar).
Now the problem was that the ISP has assigned a NEW IP, and this script tried to ping the OLD IP address, but since the ping to this address always failed, the script made a network restart each time.