Hello,

https://www.kamailio.org/docs/modules/devel/modules/dialog#dialog.p.dlg_filt... says for dialog.dlg_filter_mode (int)

Set dialog fitering mode, which can specify what dialogs are processed. Its value can be a combination (the sum) of following flags:

1 - do not send keepalives and do not execute timeout function if dialog is not local (if the associated bind address is not a local socket).

Default value is “0”.

As you can see, the definition of 1 is a double negation and there is no definition for 0. What means 0:

- do not send keepalives and do not execute timeout function if dialog is local - send keepalives and execute timeout function if dialog is not local - send keepalives and execute timeout function if dialog is local