kamailio 5.3.9, ubuntu 20.04
kamailio.cfg
```c debug=-1 log_stderror=no
memdbg=5 memlog=5 log_facility=LOG_LOCAL0 log_prefix="{$mt $hdr(CSeq) $ci} " mpath="/usr/local/lib64/kamailio/modules/" children=1 listen=udp:172.29.156.216:5060
loadmodule "jsonrpcs.so" loadmodule "kex.so" loadmodule "corex.so" loadmodule "tm.so" loadmodule "tmx.so" loadmodule "sl.so" loadmodule "rr.so" loadmodule "pv.so" loadmodule "maxfwd.so" loadmodule "textops.so" loadmodule "siputils.so" loadmodule "xlog.so" loadmodule "sanity.so" loadmodule "ctl.so" loadmodule "cfg_rpc.so" loadmodule "counters.so" loadmodule "ipops.so"
modparam("jsonrpcs", "pretty_format", 1) modparam("ctl", "binrpc", "unix:/run/kamailio/kamailio_ctl") modparam("tm", "failure_reply_mode", 3) modparam("tm", "fr_timer", 30000) modparam("tm", "fr_inv_timer", 120000) modparam("rr", "enable_full_lr", 0) modparam("rr", "append_fromtag", 0)
request_route { detailed_ipv4_type($si,"$var(iptype)"); xlog("L_INFO", "$var(iptype)\n"); exit; } ```