Is it possible to run kamailio without database support (even dbtext)?
Yes, minimal stub may be looks like:
loadmodule "mi_fifo.so" loadmodule "kex.so" loadmodule "sl.so"
modparam("mi_fifo", "fifo_name", "/tmp/kamailio_fifo")
route { sl_send_reply("503", "Server is not configured"); }
Which module/function need I use to simple forward any request/responce to another sip server?