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Layer3 what are the Layer 3 like TCP/IP v4 and v6, Firewall, NAT, IPSEC, and Layer 4 HTTP, SIP, RTP, let me know some more

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  • DivakaraSaxe Sep 27, 2008

    Thank you very much...



    if there any help regarding any software I wil let you know keep the same



    All the very Best

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Http://en.wikipedia.org/wiki/OSI_model

Layer3 is the Network Layer of the OSI Model, IP operates at Network Layer, OSI Model comprises of 7 layers, Application, Presentation, Session, Transport, Network, Datalink, Physical layers.

It is a model to follow when you are building Operating systems, applications to be used on the internet or compatibility with others.

Hope this helps

Mutahir

PS : Read about it on the wiki link i have provided, let me know for any other questions you may have.

Posted on Sep 26, 2008

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1 Answer

Port forwarding on Linksys SRW224G4P


Google took me straight to the manual. This is a Switch not a router so it operates in layer-2 (ethernet). Layer-2 ports are the interfaces on the back of the switch. You want a router that can do layer-3 TCP/IP port forwarding. Layer-3 ports are unsigned 16-bit integers associated with an IP address and a protocol.

Oct 13, 2013 | Linksys SRW224G4P 24-Port Ethernet Switch

Tip

Xbox live NAT


Simple Rules

-if your NAt is strict and cannot connect
try turning your hub off for 30 seconds then turning it back on
if that didnt work.
-try resetting your IP address.
if that didnt work
-take addaptor from xbox to pc out for 30 seconds, then put it back in
if that didnt work
- try opening thies ports

TCP 53
UDP 53
TCP 80
UDP 88
UDP 3074
TCP 3074


Helpfull Info

Sometimes depending on the router brand, it's not possible to open your NAT, this simpily becuase some are not specificly designed for Xbox Live purposes. A good example of this is Belkin routers. These brands are most commonly made for Buissness connection servers. If you are experiencing a STRICT/MODERATE Nat with a Belkin router, the chances are you are going to have to deal with it, but that is not 100% of the time. If you've have attempted several techniques to open your Nat and the changes arnt happening, i'd recommend a 'N' powerd Belkin router, the most majority of these routers work 100% perect for Xbox Live, I myself oned one but changed due to a broadband switch.

How do I change the NAT firewall protection? (Open/Moderate/Strict)

Find your IP address number then type it in on your web browser, this will bring up all your switchable options where several options can be changed to your approval. The NAT firewall is one of these options which can be changed. (like I mentioned before, if you own a Belkin router, the chances are even after changing the fireall level, it will turn back to moderate or strict)

on Feb 17, 2010 | Networking Hubs & Switches

1 Answer

Connect two tigerswitch 6724AL2 via fiber port


How do I open ports in the Virtual Server? pix.gif pix.gif pix.gif You need to forward the ports used by the application to the server running the application in the Virtual Server, which is present in the router's management screen, as follows.
  1. Open your web browser, type in the router's IP address (standard: 'http://192.168.2.1') and press enter.
  2. Click on Login, Advanced Setup, NAT, Virtual Server.
  3. Enter the port details and enable it as follows:
Private IP Private Port Type Public Port 192.168.2.x xxx TCP xxx 192.168.2.x xxx UDP xxx To access the application, you can open up the ports specific to the application in the special application, which is present in the router management screen as follows:
  1. Open your web browser, type in the router's IP address (standard: 'http://192.168.2.1') and press enter.
  2. Click on Login, Advanced Setup, NAT, Special Application.
  3. Enter the port details and enable it as follows:
Trigger Port Trigger Type Public Port Public Type Enabled 3724 TCP 3724 TCP Y 6112 TCP 6112 TCP Y 6881 TCP 6881-6999 TCP Y
* The port numbers given are just an example. You need to open the ports depending on the application you are using and should get the information from the application provider.

Jan 05, 2011 | SMC TigerSwitch SMC8612T

1 Answer

Can use only one computer at a time. Why i cannot use 4,5 computer same time?


I think you are trying to access internet through broadband.
Normally the Broadband is configured for a single user, if you want to use multiple computers to a single connection then you need to use a technology called NAT ( Network Address Translation).
This technology comes with all the Layer3 devices (Routers).
You can purchase a NAT capable device and you can use 4-5 computers through a single connection to reach out internet.

Dec 02, 2010 | Networking Hubs & Switches

1 Answer

Switch D-Link DES-1024R + My problem is not gateways automatic


No It's not virus . It is issue of ip address in your computer. You can set ip address with 2 method static and DHCP. For DHCP you need to enable it in router. Connect your router to computer with ethernet cable then you can access it with following default link. http://192.168.1.1 or http://192.168.0.1 or http://192.168.15.1 or http://192.168.2.1 If you are not able to access it with above ip then check your computers ip address gateway ip is your router ip try with it. Then it ask for user name and password. Type user as "admin" and password as "admin" or "password" or blank. Then you can see configuration page of router. Then click on DHCP and enable so you can get ip from router.Enable "ip get automatic in network adapter tcp ip property. If you want to ser static ip in tcp ip then gateway ip set to router ip if your router ip is 192.168.1.1 then your computer ip is 192.168.1.3 subnetmask 255.255.255.0 and gateway as 192.168.1.1 Then you can access internet Let me know if you need further assistance. Thanks for using FixYa.

Jul 19, 2010 | D-Link DES 1024R Plus (DES-1024R+/5)...

1 Answer

I am trying to use my xbox 360 with this router and I can not seem to open my NAT. Is there a way to open it?


PS3 and Xbox ( NON BELKIN)

You Will Have to Disable the Firewall In Your modem / Router

And IF it is a router then Open The Ports

• TCP 80
• UDP 88
• UDP 3074
• TCP 3074
• UDP 53
• TCP 53

And also make sure that UPnP is Enabled

Jun 23, 2010 | Zyxel GS-108 8-Port Gigabit Ethernet...

1 Answer

Layer3


Which model are you talking about ? I have included both


Here is the OSI model
Layer 1 = physical medium & signal on the wire (physical)
Layer 2 = MAC Address and SNAP (ATM) (data link)
Layer 3 = IP Addressing V4 V6 (network)
Layer 4 = TCP/UDP (RTP, RTSP) (transport)
Layer 5 = Duplexing Half or full (Session)
Layer 6 = HTTP, FTP, SNMP (presentation)
Layer 7 = Web browser, FTP Client, (application)

TCP Model:
Layer 1 = physical medium & signal on the wire (physical) (Hub and reapeter)

Layer 2 = MAC Address and SNAP (ATM) (data) (Switches and bridges)

Layer 3 = IP Addressing V4 V6,
Layer 4 = TCP/UDP (RTP, RTSP) (Internetwork) (Firewall, IPSEC) Routers

(This function is split between 4&5) Duplexing Half or full

Layer 5 = , HTTP, FTP, SNMP, Web browser, FTP Client, (application) (programs)


I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Feb 11, 2009 | IBM Nways 8277 Model 524 Networking Switch

1 Answer

Using network switch as a router


In order to use a switch as a router it must support layer 3(I.E. routing). It appears the switch you have is just a layer 2 device that can not "route" calls. Most of these switches(hub if you will) just switch traffic from one port to another, they can not change the IP or NAT traffic etc..

Jan 07, 2009 | NetGear (fs524na-promo) 24x10/100 Mbps...

1 Answer

Router no connecting to the internet


You need to configure NAT on the router to permit the entire LAN to access internet

Example.
LAN Segnment is 192.168.1.0/24

1. Create an access-list to identify the local segment

2. Configure the Nat interfaces properly (NAT-INSIDE, NAT-OUTSIDE)

3. do the NAT configuration

i.e ip nat inside source list (ACLNUMBER) .....

Dec 08, 2008 | Networking Hubs & Switches

1 Answer

PC2716 Connectivity


Goto start
Open control panel
Open network connection (XP)
Right click on Local Area connection
Goto properties
click on Internet protocol TCP/IP
Click on properties
Try to change the Ip address on that window
If it does not make any difference then TRy to disable the firewall that is installed on the computer.

Jun 04, 2008 | Dell PowerConnect 2716 16-Port Gigabit...

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