Port Network
Port Network
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 ACER COMPUTER NETWORKING HUB ACER116 16 PORT MODEL ALH 16  US $.99
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 NEW 10 100MBPS 8 PORT LAN SWITCH Network Product For Home or Office Use US $15.50
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 3Com Superstack II 3C16671A 24 Ports External Network Hub stackable US $13.85
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 CENTRECOM 3612TR 12 PORT HUB REPEATER WITH NETWORK MANAGEMENT US $12.99
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 MILAN MICROHUB LE Model 4000H WORKGROUP HUB 8 port Network 10BaseT Deal Wow US $15.99
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 Network Everywhere 5 Port Hub US $17.99
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 BELKIN 5 PORT NETWORK USB 20 HUB PRINTER SCANNER HARD DRIVE LAN SHARE SERVER US $47.41
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 Linksys Network Everywhere 10 100 5 Port Hub US $12.00
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 SMC Networks EZ Stack 16 Port 10 100 Ethernet Hub SMC5216 US $12.95
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 SMC Networks SMC EtherEZ SMC3616TCEZEU 16 Ports Ex US $11.50
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 THOMAS CONRAD CORPORATION COMPUTER NETWORK SMART HUB16 PORT COMPUTER HUB US $.99
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 Linksys EtherFast EZXS55W 5 Ports External Ethernet Network Switch US $5.00
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 SMC Networks SMC EZ 10 100 SMC5616DS 16 Ports External Hub US $19.99
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 Digital DELNI BA 8 Port Network Hub US $9.99
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 SMC Networks EZ NET EZNET810 8 Ports External Hub stackable 3608T EZ EtherEZ US $10.99
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 Hp Procurve 24 10 100 24 Port Network Hub J3295A w Power Cord FREE SHIPPING US $34.99
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 NetGear 10 Base T EN104TP 4 Port Network Hub US $9.00
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 Linksys Network Everywhere Ethernet NH1005 5 Ports External Hub US $9.99
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 USED LINKSYS 5 PORT NETWORK HUB FAST ETHERNET 10 100 US $16.53
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 Dynex 4ports uplink Network 10baseT Hub 120v power supply USA seller FAST SHIP US $7.95
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 SMC Networks SMC EtherEZ SMC3605TEZEUR 5 Ports External Hub stackable US $6.99
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 BAY NETWORKS BayStack 152 10BASE T Hub 12PORT HUB LR701338 US $33.00
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 Proxim Wireless Networks 4312 12 Port DC Injector US $.99
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 Proxim Wireless Networks 4312 12 Port DC Injector US $.99
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 Proxim Wireless Networks 4312 12 Port DC Injector US $.99
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 SMC Networks SMC Tiger SMC6726AL2 24 Ports External Switch Managed US $29.99
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 KTI Networks KF 1016 Port 100Base TX ETHERNET HUB US $19.99
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 DYNEX 4 PORT 10 Mbps NETWORK ETHERNET HUB DX EHB4 NEW US $9.95
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 Fast 8 Port 10 100 Mbps Ethernet Hub RJ45 LAN Network Switch US $13.95
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 Lynksys 10 100 5 Port Network Hub NH1005V2 With A C Adapter US $5.00
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 Lynksys 10 100 5 Port Network Workgroup Switch GEB1040 With A C Adapter US $5.00
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 Network Everywhere Linksys NH 1005 WM 5 Port Hub Fast Ethernet 10 100 Wired US $14.00
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 NEW 4 PORT IEEE 8023 10Base T WIRED LAN ETHERNET NETWORK HUB INTERNET SHARING US $8.79
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 USB hub 5 Port Network LAN Server Printer Scanner HDD BELKIN F5L009 Mac PC US $158.05
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 SMC Networks SMC EZ SMC EZ1024DT EU 24 Ports External Switch US $65.00
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 5 Ports 10 100Mbps Fast Ethernet Network Switch Hub US $4.00
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 Fast 5 Port 10 Mbps Ethernet Hub RJ45 Network Switch US $10.99
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 Systech RCS 5016 16 port Networking PortTerminal Server 65 800383 3 00 US $39.99
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 8 Ports 10 100Mbps Fast Ethernet Network Switch Hub US $13.21
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 5 Ports 10 100Mbps Fast Ethernet Network Switch Hub US $12.92
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 8 Port 10 100 Fast Ethernet Network LAN Switch hub NEW US $25.76
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 5 Ports 10 100Mbps Fast Ethernet Network Switch Hub US $11.05
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 8 Ports 10 100Mbps Fast Ethernet Network Switch Hub US $15.43
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 NORTEL NETWORKS 24 PORT 10 100 2 PORT 1000 Mbps NETWORK SWITCH 325 24G SWITCH US $55.00
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 Netgear DS116 Auto 10 100 Mbps Dual Speed 16 Port Network Ethernet Hub US $99.99
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 Dell PowerConnect 2224 Network Switch 24 Port Rm Rack US $30.79
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 Transition Networks StackMaster 6 Port Ethernet Hub SMHB E FL 6 US $35.99
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 Transition Networks StackMaster 12 Port Ethernet Hub SMHB E FL 12 US $44.99
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 Juniper Networks EX4200 24PX EX 4200 24PX switch 24 ports managed d US $4,189.99
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 8 Port Networking Hub hub only works well US $3.75
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 Nortel Networks Nortel Ethernet Routing AL4500A13E6 24 Ports External US $800.00
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 Hawking PN800TP 10Base T 8 Port Network Hub US $12.99
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 3Com Superstack II 24 Ports External Ethernet Network Baseline Switch US $14.99
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 3Com Superstack II 12 Ports External Network Switch Dual Speed Hub 500 US $9.99
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 Nortel Networks Lattis 2814SA 16 Ports External Hub Managed stackable US $39.99
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 3Com Superstack II 12 Ports External Ethernet Network Switch Works GREAT US $14.99
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 TrendNet TU2 NU4 TRENDnet 4 port Network USB Hub Kit US $64.90
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 SMC Networks SMC EZ HUB 10 100 SMC5612DS 12 Ports US $19.99
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 Intellient Network Solutions 524162 Ethernet Switch 24 Port 24 x US $186.32
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 Avocent AutoView AV3016001 16 Ports External Network Device BRAND NEW US $710.00
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 Enterasys Networks MGBIC LC03 Mini Gigabit Ethernet port interface with one US $598.99
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 Bay Networks 8 Port Hub Model 800 US $15.95
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 100Mbps 10 100 8 Ports Ethernet Network Switch HUB US $109.58
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 12 Port Ethernet Network Hub 10 100 Internet Repeater US $39.98
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 Ethernet 12 Port Network Hub Cable DSL Internet 10 100 US $49.98
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 24 Port Ethernet Network Hub Superstack DSL Internet US $39.98
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 NetGear BAY NETWORKS EN308 10Base T front 8 Ports w BNC AUI 15 Pin D Sub US $27.50
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 24 Port Network Switch US $158.39
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 TrendNet TE100 S80g TRENDnet Network Device TE100 S80g 8 Port 10 100Mbps GREENne US $213.83
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 TP Link TL SG1008D TP Link Network TL SG1008D 8 port Unmanaged Gigabit Desktop S US $50.10
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 Transition Networks Sistf1010 250 lrt Ethernet Switch 5 Port 5 X 10 100base tx US $243.59
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 Netgear DS104 Dual Speed 4 Port Ethernet Network Hub US $98.00
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 HP J3302A ProCurve 10 Base T Network Hub 24 Ports Port US $50.99
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 NetGear 4 Port 10Base T Ethernet Lan 10Mbps Net work ing Hub EN104TP Parts As Is US $16.95
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 CISCO FastHub 316T 300 Series 16 Port Fast Network Hub US $20.00
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 Bay Networks BayStack 101 10Base T Hub 12 Port US $26.99
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 HP AdvanceStack J2611B 16 Ports External Hub stackable CCNA WAN LAN NETWORK US $10.00
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 Extreme Networks Summit X460 24x Layer 3 Switch 8 Port 26 Slot 8 X US $5,213.43
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 Extreme Networks Summit X450e 48t Layer 3 Switch 48 Port 5 Slot 48 x US $4,102.96
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 Extreme Networks Summit X460 24p Layer 3 Switch 24 Port 10 Slot 24 X US $3,884.78
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 Extreme Networks Summit X460 48t Ethernet Switch 48 Port 6 Slot 48 X US $5,213.89
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 Milan Technology MIL S2400S 24 Port Network US $29.95
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 EFA 8 port Networking Hub US $7.99
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 8 Ports 10 100Mbps Fast Ethernet Network Switch Hub US $15.39
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 SMC 5624DS Network EZ HUB 10 100 24 port cascadable 2x US $115.00
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 UB Networks GeoStax E 16 Port Hub w Fiber Port US $4.99
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 TRENDnet TU2NU4 4 Port Network USB Hub TU2 NU4 US $47.98
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 TRENDNET TE100 DX16R 16PORT DUAL SPEED NETWORK HUB US $15.00
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 8 Ports 10 100Mbps Fast Ethernet Network Switch Hub US $15.39
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 SYNOPTICS LATTISHUB 2814 16 PORT ETHERNET HUB NETWORKING DEVICE US $14.36
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 Zyxel Communications Inc Gs4012f Networking 12 Port Managed L3 Gig US $689.49
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 BICC Data Networks EASY Fibre Optic Hub 6 Port Type 1160 US $218.41
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 Intellient Network Solutions 524063 Web Smart Ethernet Switch 24 Port 24 x US $243.30
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 StarTechcom 2 Port USB KVM Switch with Network Hub and Audio KVM SV231USBAN US $142.99
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 TrendNet TU2 NU4 4 port Network USB Hub US $59.00
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 DYNEX DX EHB4 4 PORT 10 MBPS Network Ethernet Hub US $8.99
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 TrendNet TE100 S80g Network Device 8 Port 10 100Mbps Green net Switch Retail US $197.99
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 Intellient Network Solutions 524124 Ethernet Switch 8 Port 8 x US $45.03
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 Intellient Network Solutions 530378 Gigabit Ethernet Switch 5 Port 5 x US $36.91
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 BAY NETWORKS BAYSTACK 204 24 PORT 100BASE TX ENET HUB US $199.95
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How To Tell If Someone Is Lurking On Your Wireless Home Network
You heard the old saying "were not alone". Well, the same can be said about your Wireless Home Network.
Have you ever wondered if someone else is on your network, with out your knowledge, watching every site you visit or stealing account information from your GMail or bank account?
Sure you probably went to great lengths to implement and secure your wireless home network, but any Network Security professional will tell you NOTHING is bullet proof.
While nothing is bullet proof, being proactive with monitoring can catch the un-wanted guest...off guard.
So what can you do to monitor and identify if someone is wondering around on your home network?
You can use some simple tools, when combined, will help you see your Network and give you a view of who's online.
NOTE: With these tools chances of identifying someone on your network increases, but will NOT prevent them from gaining access to your Network. Other tools exist than described in this article, but the goal is to show you the different type of tools and how to use them.
1 - Firewall Logs - is a good place to start. If you have a Firewall running on your Computer or on your router, look for suspicious activity by scanning the logs for anything out of the ordinary with inbound and outbound traffic.
One method you can use is to look for patterns. For example, if someone was scanning your computer to see what ports are open, the logs will show continuous activity from the same IP Address (an intruder's computer) sending a stream of data to many different ports to a single IP Address or range of IP Addresses.
Obviously, with a smart hacker, they can do many things to cover their tracks, but one thing is for sure, data must be transmitted to probe your computer, and patterns is one method to use for spotting trouble on your Network.
2 - DHCP Logs - if the unwanted guest is not Network savvy, or security on your router is not up to snuff, they may be able to drop in unannounced, by receiving an IP Address from your wireless DHCP server.
You can easily view a list of active addresses by connecting to your router and checking the DHCP log. For example, on my Linksys router, the log is located in the Wireless MAC Filter tab, where I can see and identify all active hosts on my Network. But this does not guarantee that these are the only active PC's on my Network.
Why?
Unfortunately, a more sophisticated hacker can get around the need to rely on DHCP. If they did their homework (you can be sure of that), they probably figured out the range of IP Addresses in use on your Network, found an unused address in that range and configure their PC with a static address.
3 - Check Who's Connecting To Your Computer - Now that you identified who the trusted computers are on your network (from the DHCP logs), you can check who is connected to your computer.
To do this, open a command prompt and enter the following command:
netstat -an
where:
a = Displays all connections and listening ports
n = Displays addresses and port numbers in numerical form
Netstat is a useful tool that displays network connections (both incoming and outgoing) on computers. This will allow you to see all IP Addresses that have made a connection to your computer.
Netstat shows you the type of connection (TCP or UDP), IP Address and port number (number after addresses separated by a colon) for both Local (your computer) and Foreign addresses.
To find your IP Address, just enter ipconfig at the command prompt.
You should be able to easily spot any addresses (Foreign column) that is outside the DHCP range on your router and investigate.
You can also see what executable are involved in creating each connection by using the -b switch with the netstat command (netstat -b)
Now this is great for checking connections on your Computer, but what if someone is on your Network and not connected to your Computer?
4 - Scanning your entire Network - When Computers communicate with each other, they do so with ports (as you saw with the netstat command). Some ports that may be familiar to you are 80 (HTTP), 443 (SSL). 25 (SMTP), 110 (POP). For example, when your Computer browses a website, it opens up port 80 and sends the request out,
To see open ports on a Computer, a tool called Port Scanner can be used that can scan a Network and identify devices by probing for open ports.
Information that can be found is the connection type (TCP or UDP), type of port and IP Address.
Many Port Scanners exist, such as Advanced Port Scanner (Famatech Software) and can scan a range of IP Addresses.
By scanning a range of IP Addresses, you can quickly see who is on your Wireless Network and what they are doing from the list of open ports.
You can easily find out the entire range of addresses (including addresses outside the DHCP scope) your router uses. To do that, connect to your wireless router administration of interface and look for the router subnet mask information.
On a typical Linksys router, the default setting for the subnet mask is 255.255.255.0. Using a subnet mask calculator you can determine the range of IP Address that can be used on your Network.
For example, the subnet mask of 255.255.255.0 with the IP address of the router - 192.168.1.1 (Class C) has an IP address range of 192.168.1.1 - 192.168.1.254. (Note that DHCP reserves address 192.168.1.100 thru 192.168.1.149 which means all other addresses in that range can be used as static address).
Time To Be Proactive
As you can see some of the methods used above are good for random check ups on your Wireless Home Network.
But just being proactive is not enough and using a combination of monitoring, tightening up security and changing your passwords often, among other items, can help from having your identity stolen.
About the Author
I'm sure there are Network Security Professionals out there who may have better methods than described in this article. If you are one if them, I welcome your comments and suggestions to provide us with more network security tips and suggestions.
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Where can I find my network port number?
I am running windows vista.
Which port do you need? what do you want to do? Ports depends on what applications you will be running...good luck..jexter@eastern.com.ph
Network Troubleshooting: Tips for Switch Port Mapping Using SNMP
