diff --git a/host/utils/umtrx_net_burner b/host/utils/umtrx_net_burner
index 323076c9..f8e46d40 100755
--- a/host/utils/umtrx_net_burner
+++ b/host/utils/umtrx_net_burner
@@ -137,25 +137,14 @@ def is_valid_fw_image(fw_image):
 ########################################################################
 # interface discovery and device enumeration
 ########################################################################
-def command(*args):
-    p = subprocess.Popen(
-        args,
-        stdout=subprocess.PIPE,
-        stderr=subprocess.STDOUT,
-    )
-    ret = p.wait()
-    verbose = p.stdout.read().decode()
-    if ret != 0: raise Exception(verbose)
-    return verbose
-
 def get_interfaces():
     if(platform.system() is "Windows"): return win_get_interfaces()
     else: return unix_get_interfaces()
 
 def unix_get_interfaces():
-    ifconfig = command("/sbin/ifconfig")
-    ip_addr_re = "cast\D*(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})"
-    bcasts = re.findall(ip_addr_re, ifconfig)
+    ipint = subprocess.check_output(["/sbin/ip", "-4", "a", "s", "up"])
+    ip_addr_re = "brd\D*(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})"
+    bcasts = re.findall(ip_addr_re, ipint)
     return bcasts
 
 def win_get_interfaces():