You can see the log messages in /var/log/syslog. You can configure the logging further to create custom logs [1]
For no proposal, you should set CFG to 3 My config looks like the following $ /etc/strongswan.d/charon-systemd.conf charon-systemd { filelog { /var/log/strongswan.log { time_format = %b %e %T flush_line = yes default = -1 cfg = 5 } } } And don’t forget to handle log rotation $ /etc/logrotate.d/strongswan /var/log/strongswan.log { su root adm rotate 4 daily missingok notifempty compress delaycompress copytruncate } [1] https://wiki.strongswan.org/projects/strongswan/wiki/LoggerConfiguration <https://wiki.strongswan.org/projects/strongswan/wiki/LoggerConfiguration> > On 3 May 2018, at 00:49, Naveen Neelakanta <naveen.b.neelaka...@gmail.com> > wrote: > > Hi Noel, > > I am using the vici plugin to handle the events and configure the tunnels, > however in case of errors like the "no proposal " or auth failure, can this > information be retrieved from vici messages . > > That will help a lot for debugging, if this is already present please point > me to the information, Appreciate your response. > > Thanks, > Naveen