How to connect USB-NetHUB?

Radiokot · Fri Apr 29, 2011 3:35 pm

Hello.
I have RB493G router. And I cannot make the USB NetHub (http://en-us-support.belkin.com/app/pro ... ail/p/4780) working. I suppose this HUB needs TCP and UDP to connect to clients. It uses port 19540 to connect. The client uses software to use the device, connected to HUB. For instance my client has address 192.168.130.54/24, router has 192.168.130.1/24 and NET HUB has 192.168.130.96/24.

When I run the Net HUB software on the client it sends some traffic like
UDP Src 192.168.130.54:49995 Dst 255.255.255.255:19540
to find the HUB.

And the HUB sends answer like
UDP Src 192.168.130.96:19540 Dst 192.168.130.1:49995.

That's why I cannot see the HUB - Mikrotik router redirects HUB packets to itself. To avoid this I included the firewall NAT rule:

0 ;;; Belkin Net HUB
 chain=dstnat action=dst-nat to-addresses=192.168.130.54 protocol=udp src-address=192.168.130.96 src-port=19540 
dst-limit=100000,5,dst-address/1m40s

Now I can see devices, connected to Net HUB. But I cannot connect to it.

Te HUB help requires to set firewall rules on the client:

Name: NUHCC (Out)
TCP or UDP: TCP
Port Range: 19540 to 19540
For Connections: Outbound [remote ports]
Scope: Internet

Name: NUHCC(IN)
TCP or UDP: UDP
Port Range: 19540 to 19540
For Connections: Inbound [local ports]
Scope: Internet

If I switch off the Connection Tracking function, then HUB works good. But many other router functions also are stopped.
Help me, please. What should I do to make this HUB working?

The Belkin USB nethub is a USB-HUB-device that is connected to the LAN network. The USB devices (flash drives, printers, scanners) are connected to this HUB hardware. Each user can connect to HUB via LAN and use connected to HUB USB devices like it was connected to user's computer. (USB - устройства воткнуты в ХАБ, ХАБ воткнут в сеть. Пользователь подключается к хабу, видит подключенные к нему устройства и пользуется этими устройствами через сеть, как будто они подключены через USB его компьютера)

Also look, please at the normal communication of Belkin device (address 192.168.200.67) and client (192.168.200.54):

1 20:28:15 27/04/11 1.3981052 NetmonFilter NetmonFilter:Updated Capture Filter: None 
2 20:28:15 27/04/11 1.3981052 NetworkInfoEx NetworkInfoEx:Network info for , Network Adapter Count = 1 
3 20:28:15 27/04/11 1.3981052 [001EC1 A40643 [00-1E-C1-A4-06-43]] [0180C2 000000 [01-80-C2-00-00-00]] SPANTreeBPDU SPANTreeBPDU 
4 20:28:15 27/04/11 1.5524857 FE80:0:0:0:D8CB:2FF:FEA8:14FB FF02:0:0:0:0:0:0:1 ICMPv6 ICMPv6:Router Advertisement {IPv6:1}
5 20:28:16 27/04/11 2.6436754 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51906, DstPort = 19540, Length = 96 {UDP:3, IPv4:2}
6 20:28:16 27/04/11 2.6439024 192.168.200.54 255.255.255.255 UDP UDP:SrcPort = 51907, DstPort = 19540, Length = 96 {UDP:5, IPv4:4}
7 20:28:17 27/04/11 2.7643199 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51906, Length = 174 {UDP:3, IPv4:2}
8 20:28:17 27/04/11 2.7700622 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51908, DstPort = 19540, Length = 96 {UDP:6, IPv4:2}
9 20:28:17 27/04/11 2.9143256 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51907, Length = 174 {UDP:7, IPv4:2}
10 20:28:17 27/04/11 2.9144705 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51908, Length = 79 {UDP:6, IPv4:2}
11 20:28:17 27/04/11 2.9149809 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51908, DstPort = 19540, Length = 96 {UDP:6, IPv4:2}
12 20:28:17 27/04/11 2.9152803 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51908, Length = 16 {UDP:6, IPv4:2}
13 20:28:17 27/04/11 3.3973085 [001EC1 A40643 [00-1E-C1-A4-06-43]] [0180C2 000000 [01-80-C2-00-00-00]] SPANTreeBPDU SPANTreeBPDU 
14 20:28:17 27/04/11 3.4908968 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51909, DstPort = 19540, Length = 96 {UDP:8, IPv4:2}
15 20:28:17 27/04/11 3.4912196 192.168.200.54 255.255.255.255 UDP UDP:SrcPort = 51910, DstPort = 19540, Length = 96 {UDP:9, IPv4:4}
16 20:28:17 27/04/11 3.6243229 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51909, Length = 174 {UDP:8, IPv4:2}
17 20:28:17 27/04/11 3.6294242 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51911, DstPort = 19540, Length = 96 {UDP:10, IPv4:2}
18 20:28:17 27/04/11 3.7243294 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51910, Length = 174 {UDP:11, IPv4:2}
19 20:28:17 27/04/11 3.7244691 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51911, Length = 79 {UDP:10, IPv4:2}
20 20:28:17 27/04/11 3.7246733 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51911, DstPort = 19540, Length = 96 {UDP:10, IPv4:2}
21 20:28:17 27/04/11 3.7249818 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51911, Length = 16 {UDP:10, IPv4:2}
22 20:28:18 27/04/11 4.2013309 192.168.200.54 255.255.255.255 UDP UDP:SrcPort = 51910, DstPort = 19540, Length = 96 {UDP:9, IPv4:4}
23 20:28:18 27/04/11 4.2843237 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51910, Length = 174 {UDP:11, IPv4:2}
24 20:28:19 27/04/11 4.8349309 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51912, DstPort = 19540, Length = 96 {UDP:12, IPv4:2}
25 20:28:19 27/04/11 4.8352571 192.168.200.54 255.255.255.255 UDP UDP:SrcPort = 51913, DstPort = 19540, Length = 96 {UDP:13, IPv4:4}
26 20:28:19 27/04/11 4.9243389 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51912, Length = 174 {UDP:12, IPv4:2}
27 20:28:19 27/04/11 4.9295863 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51914, DstPort = 19540, Length = 96 {UDP:14, IPv4:2}
28 20:28:19 27/04/11 5.0742951 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51913, Length = 174 {UDP:15, IPv4:2}
29 20:28:19 27/04/11 5.0744628 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51914, Length = 79 {UDP:14, IPv4:2}
30 20:28:19 27/04/11 5.0746424 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51914, DstPort = 19540, Length = 96 {UDP:14, IPv4:2}
31 20:28:19 27/04/11 5.0749395 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51914, Length = 16 {UDP:14, IPv4:2}
32 20:28:19 27/04/11 5.3438213 192.168.200.153 192.168.200.61 TCP TCP:Flags=...A...., SrcPort=NETBIOS Session Service(139), DstPort=1168, PayloadLen=0, Seq=3042146061, Ack=3820605381, Win=2920 {TCP:17, IPv4:16}
33 20:28:19 27/04/11 5.3439102 192.168.200.54 192.168.200.153 ICMP ICMP:Redirect Message {IPv4:18}
34 20:28:19 27/04/11 5.3965129 [001EC1 A40643 [00-1E-C1-A4-06-43]] [0180C2 000000 [01-80-C2-00-00-00]] SPANTreeBPDU SPANTreeBPDU 
35 20:28:19 27/04/11 5.4828893 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51915, DstPort = 19540, Length = 96 {UDP:19, IPv4:2}
36 20:28:19 27/04/11 5.4831088 192.168.200.54 255.255.255.255 UDP UDP:SrcPort = 51916, DstPort = 19540, Length = 96 {UDP:20, IPv4:4}
37 20:28:19 27/04/11 5.5643114 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51915, Length = 174 {UDP:19, IPv4:2}
38 20:28:19 27/04/11 5.5725945 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51917, DstPort = 19540, Length = 96 {UDP:21, IPv4:2}
39 20:28:19 27/04/11 5.6043259 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51916, Length = 174 {UDP:22, IPv4:2}
40 20:28:19 27/04/11 5.6044611 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51917, Length = 79 {UDP:21, IPv4:2}
41 20:28:19 27/04/11 5.6046692 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51917, DstPort = 19540, Length = 96 {UDP:21, IPv4:2}
42 20:28:19 27/04/11 5.6049874 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51917, Length = 16 {UDP:21, IPv4:2}
43 20:28:20 27/04/11 6.1468309 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51918, DstPort = 19540, Length = 96 {UDP:23, IPv4:2}
44 20:28:20 27/04/11 6.1471057 192.168.200.54 255.255.255.255 UDP UDP:SrcPort = 51919, DstPort = 19540, Length = 96 {UDP:24, IPv4:4}
45 20:28:20 27/04/11 6.1643157 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51918, Length = 174 {UDP:23, IPv4:2}
46 20:28:20 27/04/11 6.1696913 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51920, DstPort = 19540, Length = 96 {UDP:25, IPv4:2}
47 20:28:20 27/04/11 6.2543225 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51919, Length = 174 {UDP:26, IPv4:2}
48 20:28:20 27/04/11 6.2544617 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51920, Length = 79 {UDP:25, IPv4:2}
49 20:28:20 27/04/11 6.2546738 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51920, DstPort = 19540, Length = 96 {UDP:25, IPv4:2}
50 20:28:20 27/04/11 6.2549750 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51920, Length = 16 {UDP:25, IPv4:2}
51 20:28:21 27/04/11 7.0167456 sidebar.exe 192.168.200.54 192.168.200.1 HTTP HTTP:Request, GET http://export.yandex.ru/bar/reginfo.xml, Query:rnd=0.533463697271684&region=213 {HTTP:29, TCP:28, IPv4:27}
52 20:28:21 27/04/11 7.0177859 sidebar.exe 192.168.200.1 192.168.200.54 TCP TCP:Flags=...A...., SrcPort=3128, DstPort=61204, PayloadLen=0, Seq=1265826279, Ack=2484008438, Win=4570 {TCP:28, IPv4:27}
53 20:28:21 27/04/11 7.3484390 sidebar.exe 192.168.200.1 192.168.200.54 HTTP HTTP:Response, HTTP/1.0, Status: Ok, URL: http://export.yandex.ru/bar/reginfo.xml {HTTP:29, TCP:28, IPv4:27}
54 20:28:21 27/04/11 7.3487065 sidebar.exe 192.168.200.1 192.168.200.54 TCP TCP:[Continuation to #53]Flags=...AP..., SrcPort=3128, DstPort=61204, PayloadLen=1083, Seq=1265827739 - 1265828822, Ack=2484008438, Win=4570 {TCP:28, IPv4:27}
55 20:28:21 27/04/11 7.3488696 sidebar.exe 192.168.200.54 192.168.200.1 TCP TCP:Flags=...A...., SrcPort=61204, DstPort=3128, PayloadLen=0, Seq=2484008438, Ack=1265828822, Win=16425 {TCP:28, IPv4:27}
56 20:28:21 27/04/11 7.3957556 [001EC1 A40643 [00-1E-C1-A4-06-43]] [0180C2 000000 [01-80-C2-00-00-00]] SPANTreeBPDU SPANTreeBPDU 
57 20:28:23 27/04/11 9.1679399 192.168.200.54 192.168.130.90 SNMP SNMP:Version1, Community = public, Get request, RequestID = 597 {UDP:31, IPv4:30}
58 20:28:23 27/04/11 9.2173700 192.168.200.54 255.255.255.255 UDP UDP:SrcPort = 51919, DstPort = 19540, Length = 96 {UDP:24, IPv4:4}
59 20:28:23 27/04/11 9.3143265 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51919, Length = 174 {UDP:26, IPv4:2}
60 20:28:23 27/04/11 9.3949965 [001EC1 A40643 [00-1E-C1-A4-06-43]] [0180C2 000000 [01-80-C2-00-00-00]] SPANTreeBPDU SPANTreeBPDU 
61 20:28:25 27/04/11 11.2552078 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51920, DstPort = 19540, Length = 96 {UDP:25, IPv4:2}
62 20:28:25 27/04/11 11.2555665 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51920, Length = 79 {UDP:25, IPv4:2}
63 20:28:25 27/04/11 11.2556880 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51920, DstPort = 19540, Length = 96 {UDP:25, IPv4:2}
64 20:28:25 27/04/11 11.2559971 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51920, Length = 16 {UDP:25, IPv4:2}
65 20:28:25 27/04/11 11.3392402 FE80:0:0:0:D8CB:2FF:FEA8:14FB FF02:0:0:0:0:0:0:1 ICMPv6 ICMPv6:Router Advertisement {IPv6:1}
66 20:28:25 27/04/11 11.3971376 [001EC1 A40643 [00-1E-C1-A4-06-43]] [0180C2 000000 [01-80-C2-00-00-00]] SPANTreeBPDU SPANTreeBPDU 
67 20:28:27 27/04/11 13.1305884 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51920, DstPort = 19540, Length = 96 {UDP:25, IPv4:2}
68 20:28:27 27/04/11 13.1309790 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51920, Length = 79 {UDP:25, IPv4:2}
69 20:28:27 27/04/11 13.1311062 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51920, DstPort = 19540, Length = 96 {UDP:25, IPv4:2}
70 20:28:27 27/04/11 13.1313965 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51920, Length = 16 {UDP:25, IPv4:2}
71 20:28:27 27/04/11 13.2248485 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51921, DstPort = 19540, Length = 518 {UDP:32, IPv4:2}
72 20:28:27 27/04/11 13.2254262 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51921, Length = 19 {UDP:32, IPv4:2}
73 20:28:27 27/04/11 13.2256840 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 19540, Length = 1032 {UDP:33, IPv4:2}
74 20:28:27 27/04/11 13.2341398 192.168.200.54 192.168.200.67 UDP UDP:SrcPort = 51921, DstPort = 19540, Length = 96 {UDP:32, IPv4:2}
75 20:28:27 27/04/11 13.2344997 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51921, Length = 16 {UDP:32, IPv4:2}
76 20:28:27 27/04/11 13.2452709 System 192.168.200.54 192.168.200.67 TCP TCP:Flags=......S., SrcPort=61205, DstPort=19540, PayloadLen=0, Seq=2936280916, Ack=0, Win=8192 ( Negotiating scale factor 0x2 ) = 8192 {TCP:34, IPv4:2}
77 20:28:27 27/04/11 13.2455287 System 192.168.200.67 192.168.200.54 TCP TCP:Flags=...A..S., SrcPort=19540, DstPort=61205, PayloadLen=0, Seq=1118239, Ack=2936280917, Win=1460 ( Scale factor not supported ) = 1460 {TCP:34, IPv4:2}
78 20:28:27 27/04/11 13.2540929 System 192.168.200.54 192.168.200.67 TCP TCP:Flags=...A...., SrcPort=61205, DstPort=19540, PayloadLen=0, Seq=2936280917, Ack=1118240, Win=64240 (scale factor 0x0) = 64240 {TCP:34, IPv4:2}
79 20:28:27 27/04/11 13.2543951 System 192.168.200.67 192.168.200.54 TCP TCP:Flags=...A...., SrcPort=19540, DstPort=61205, PayloadLen=0, Seq=1118240, Ack=2936280917, Win=33580 (scale factor 0x0) = 33580 {TCP:34, IPv4:2}
80 20:28:27 27/04/11 13.2553185 System 192.168.200.54 192.168.200.67 TCP TCP:Flags=...AP..., SrcPort=61205, DstPort=19540, PayloadLen=22, Seq=2936280917 - 2936280939, Ack=1118240, Win=64240 (scale factor 0x0) = 64240 {TCP:34, IPv4:2}
81 20:28:27 27/04/11 13.2556150 System 192.168.200.67 192.168.200.54 TCP TCP:Flags=...A...., SrcPort=19540, DstPort=61205, PayloadLen=0, Seq=1118240, Ack=2936280939, Win=33580 (scale factor 0x0) = 33580 {TCP:34, IPv4:2}
82 20:28:27 27/04/11 13.2575586 System 192.168.200.67 192.168.200.54 TCP TCP:Flags=...AP..., SrcPort=19540, DstPort=61205, PayloadLen=28, Seq=1118240 - 1118268, Ack=2936280939, Win=33580 (scale factor 0x0) = 33580 {TCP:34, IPv4:2}
83 20:28:27 27/04/11 13.2576316 System 192.168.200.54 192.168.200.67 TCP TCP:Flags=...AP..., SrcPort=61205, DstPort=19540, PayloadLen=22, Seq=2936280939 - 2936280961, Ack=1118268, Win=64212 (scale factor 0x0) = 64212 {TCP:34, IPv4:2}
84 20:28:27 27/04/11 13.2579070 System 192.168.200.67 192.168.200.54 TCP TCP:Flags=...A...., SrcPort=19540, DstPort=61205, PayloadLen=0, Seq=1118268, Ack=2936280961, Win=33580 (scale factor 0x0) = 33580 {TCP:34, IPv4:2}

UDP packets - looking for connected to HUB devices.
TCP packets - connecting to device and using it.

Mikrotik router when, gets this packet:

22 20:28:18 27/04/11 4.2013309 192.168.200.54 255.255.255.255 UDP UDP:SrcPort = 51910, DstPort = 19540, Length = 96 {UDP:9, IPv4:4}
sends answer 
23 20:28:18 27/04/11 4.2843237 192.168.200.67 192.168.200.54 UDP UDP:SrcPort = 19540, DstPort = 51910, Length = 174 {UDP:11, IPv4:2}

to the router address, instead to the sender address.

Why and what can I do to resolve this?