I can't get smbclient connecting to old samba server (unknown version inside a sagecom NAS):

smbclient -L gateway -N -I 192.168.25.1 -d10

INFO: Current debug levels:
  all: 10
  tdb: 10
  printdrivers: 10
  lanman: 10
  smb: 10
  rpc_parse: 10
  rpc_srv: 10
  rpc_cli: 10
  passdb: 10
  sam: 10
  auth: 10
  winbind: 10
  vfs: 10
  idmap: 10
  quota: 10
  acls: 10
  locking: 10
  msdfs: 10
  dmapi: 10
  registry: 10
  scavenger: 10
  dns: 10
  ldb: 10
lp_load_ex: refreshing parameters
Initialising global parameters
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
INFO: Current debug levels:
  all: 10
  tdb: 10
  printdrivers: 10
  lanman: 10
  smb: 10
  rpc_parse: 10
  rpc_srv: 10
  rpc_cli: 10
  passdb: 10
  sam: 10
  auth: 10
  winbind: 10
  vfs: 10
  idmap: 10
  quota: 10
  acls: 10
  locking: 10
  msdfs: 10
  dmapi: 10
  registry: 10
  scavenger: 10
  dns: 10
  ldb: 10
params.c:OpenConfFile() - Unable to open configuration file "/etc/samba/smb.conf":
	Arquivo ou diretório não encontrado
pm_process() returned No
lp_servicenumber: couldn't find homes
smbclient: Can't load /etc/samba/smb.conf - run testparm to debug it
added interface wlan0 ip=192.168.25.3 bcast=192.168.25.255 netmask=255.255.255.0
added interface virbr0 ip=192.168.122.1 bcast=192.168.122.255 netmask=255.255.255.0
Netbios name list:-
my_netbios_names[0]="POLESBOOK"
Client started (version 4.1.7-Debian).
Connecting to 192.168.25.1 at port 445
Connecting to 192.168.25.1 at port 139
Socket options:
	SO_KEEPALIVE = 0
	SO_REUSEADDR = 0
	SO_BROADCAST = 0
	TCP_NODELAY = 1
	TCP_KEEPCNT = 9
	TCP_KEEPIDLE = 7200
	TCP_KEEPINTVL = 75
	IPTOS_LOWDELAY = 0
	IPTOS_THROUGHPUT = 0
	SO_REUSEPORT = 0
	SO_SNDBUF = 87040
	SO_RCVBUF = 372480
	SO_SNDLOWAT = 1
	SO_RCVLOWAT = 1
	SO_SNDTIMEO = 0
	SO_RCVTIMEO = 0
	TCP_QUICKACK = 1
	TCP_DEFER_ACCEPT = 0
 session request ok
convert_string_talloc: Conversion error: Incomplete multibyte sequence()
Conversion error: Incomplete multibyte sequence()
protocol negotiation failed: NT_STATUS_INVALID_PARAMETER