Packet Tracer cannot send pdu from lan to wireless - networking

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I can't send pdu from pc to wireless laptop

It actually can send the PDU because u only have a network so the network between your PCs and your laptops is actually the same network. Check your IP address on your PC (it should be on the same network / subnet). If your PCs and laptops are already on the same subnet, check the port of the connected cable on the wireless router. It should be placed on ethernet / gigaethernet. But u can't connect it into internet port.
The wireless router that u are using is actually only Access Point. Because of that, it only can have a single network either on LAN or wireless.
Hope it helps!

Related

How to Access a Wifi Device Through a Switch

Here's the situation...
I have 3 desktop Win PC's ("A", "B" and "C") connected to a Switch (TP-Link 8 Gigaport Switch). Also connected to my switch is the cable company's router, and I have a 100 foot Ethernet wire to the middle of my house where there is a wireless router.
This works great - home automation stuff + cell phone connect to wireless router, A, B, & C can talk to each other (share files, remote desktop, shared printer, etc). Life was grand.
Then I bought a MS Surface. I can't get the Surface to "see" A, B & C, and they can't see the Surface. I assume it is because the wireless router OR the Switch won't share outside their walls. How do I do that?
I'm a programmer, not a network guy (obviously) so dumb it down for me! Thanks!
I'll assume broadcasts or multicasts are used to "see" other hosts.
If your wireless router is configured in NAT mode then broadcasts won't be forwarded between your wired and wireless network.
Try configuring your wireless router to operate in bridged mode which will allow broadcasts to be forwarded between the wired and wireless networks. This will allow discovery to "see" hosts on the other part of the network.
As your cable router will be acting as a DHCP server you should disable the DHCP server on you wireless router when it is operating in bridged mode.

Wifi router with DHCP enabled to a network

I have this very cheap all in one machine (modem + wifi router) provided by my service provider. I have disabled the wifi on it and bought a netgear nighthawk. Now i am trying to set it up that some devices are connected to wifi and some are connected using wire to the modem. I am trying to figure out how i can have DHCP enabled on both machine and also have access to machines connected to modem. So my setup is as follow.
Modem has 4 LAN ports and have 3 devices and the the nighthawk wifi router connected to it. The access IP of the modem is 192.168.1.1 and starting IP is 192.168.1.2 with subnet mask 255.255.255.0 and have DHCP enabled to provide IPs to everything connected to it.
The WIFI router access IP is IP 192.168.0.1 has starting IP 192.168.0.2 with subnet mask 255.255.255.0 and DHCP enabled to provide IP to everything connected to it.
I would like devices connected to WIFI router to have access to devices connected to Modem and vice versa.
Can someone help me figure this out.
On your configuration you have 2 NAT one from the ISP and another one from your access point/router (nighthawk). Meaning that you have 2 networks with different IP ranges.
This is how I configure the LAN when I have multiple routers to extend the coverage.
Assign an IP address to the nighthawk on the range of 192.168.1.x/255.255.255.0 ex 192.168.1.2
Disable the DHCP on the nighthawk
Connect your ISP router to a LAN interface on the Nighthawk.
What will happen is that your nighthawk will be just an access point, all the DHCP will be at the ISP router meaning that all ips will be on the same range. If you connect your ISP to the Nighthawk WAN interface it is going to go nowhere because some of them are programmed to do a NAT between the Lan an Wan interfaces.
I also configure the DHCP to assign ip's from 192.168.1.100 to 192.168.1.200 range, all devices from 1 to 99 are routers, access points, servers, cameras, printers or devices that need an static ip address. Then I have segments ex. routers are 1-9, printers 10-29, etc etc. By doing this I will now what device is or their purpose on the network.
Hope it helps.

WDS Router doesn't forward DHCP packets

Recently I have followed this link to setup a wireless router into an access point in my home.
Our current network components are as follows:
Main router (192.168.1.1): a Sercomm router configured by the ISP, with DHCP enabled for address 192.168.1.30 onwards.
AP router (192.168.1.2): a TP-Link WD8970 router on the bridge mode, with WDS turned on (on the same SSID, mode and channel as the main router) and DHCP turned off. However, this AP is configured to broadcast a different SSID to indicate a different storey.
Devices (182.168.1.xx): desktop or mobile clients that could connect to both SSIDs.
(click here for the topology image)
The problem is that:
Most of the time, devices connected to AP router's SSID is given 169.254.x.x IP addresses and could not reach the internet
Devices that is configured with a dynamic IP and connected to the main router's SSID could reach only devices connected to the main router's SSID
Devices that is configured with a static IP and connected to AP router's SSID could reach both routers (the main router at 192.168.1.1 and the AP router at 192.168.1.2, respectively)
DHCP packets are not forwarded from the main router (192.168.1.1) to the AP router (192.168.1.2), while other types of packets could flow through
How would you advice on configuring this home network differently, to make it more stable and usable?
I had the same issues in past days. I fixed checking the flag "DHCP RELAY". As soon as I checked it all went fine. All devices connected to the wireless router have received the IP address form DHCP server.
https://www.tp-link.com/us/support/faq/1630/ (the real configuration page on Archer D7 is slightly different form what stated in the link).
This was my network: I have a small usb powered 4G modem/router connected to internet. I wanted to share the internet with several devices located far from the 4G modem/router, so I decided to extend the coverage by means a TP-LINK Archer D7 ADSL modem/router used as Wifi access point. I connected the 4G modem to AP through WDS. The pc's and printers connected to Archer D7 (AP) were fine, security camera, smartphones etc.. no IP from DHCP. After the setting DHCP RELAY everything went fine.
Most of the time, devices connected to AP router's SSID is given 169.254.x.x IP addresses and could not reach the internet
This issue has to do with the WDS connection and poor connection from the AP to the main router. As a wifi expert (ok, expired CWNA) it's never a good idea to use WiFi extenders or WDS in your case. It increases interference, adds an extra hope, and rarely helps. While it's easy to think of these as a signal booster the wifi network protocol isn't setup for these types of connections. Only some commercial APs with parabolic antennas can truly benefit from wifi extenders.
Test with a cable connected from the main router to the AP and use the interfaces instead of wifi. It's possible you have DHCP issues with your wifi issue so first test with static IPs.
If this works then you should leave the cable in place. Understandably this isn't always possible so replacing your main router with a quality wifi router would be my 2nd choice. Sorry I don't know any good consumer grade APs but they are out there.

Wifi to be like pc?

Is it possible to make wifi router with openWRT to be like an computer ? I mean, that admin of network (where wifi is connected) couldn't recognize, that any wifi router is connected.
1) Increase TTL of forwarded packets using iptables.
2) Change WAN MAC to MAC of PC's copper NIC.
3) Do not publish services on WAN.

How to setup DD-WRT between two routers with NAT

I have two networks.
Network A has both wired and wireless clients and is connected to the internet. DHCP ENABLED (10.0.0.1 with subnet 255.255.255.0)
Network B has both wired and wireless clients and is NOT connected to internet. DHCP ENABLED (192.168.1.1 with subnet 255.255.255.0) This means the WAN port of this network is not connected.
I need to connect the WAN port of Network 2 WIRELESSLY to Network A such that Network B shows up as nothing but a client in Network A. Since BOTH networks have wireless clients it's to assume that WPA is used for security.
Can anyone tell me how to set this up using DD-WRT.
Thanks
you should connect your network B device to network A device and add a static route to route client on router B reach to internet , and config router B DHCP to get the user the new gateway which is the router A ip address.

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