Disabling Internet Access On Certain Switch Ports But Not Others?

Oct 12, 2011

I have a central cisco SG200 26P switch, with about 20 ports going off to other network switches, and individual computers around the building.I need to keep the LAN functionality of the network, but I need the majority of the computers to not have internet access. But I also need to be able quickly re-enable internet access for a particular computer connected to a particular port if required.

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I have a Linksys E4200 router with firmware version 1.0.02. I am using a Macbook Pro. I can connect to a VPN server with the default VPN client software, but it kills my internet connection and disables connecting to SMB

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May 20, 2011

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Dec 12, 2011

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Feb 4, 2011

I no longer have internet access from my home network ONLY on my desktop computer. Everything was working fine as always - then while I was in my Network and Sharing Center, and clicked on my ethernet connection, 'Local Area Connection 3', I accidentally disabled it. No big deal I thought, so I re-enabled the connection. Except for some reason, my connection is all screwed up now. The name of this connection was and always has been 'dkm2' and now it just says 'Network', with no internet access. I have unplugged the cord and plugged it into this laptop and it immediately recognizes 'dkm2' and connects flawlessly, so I know the problem is on the desktop computer's end, and not the cable or router. I have tried reinstalling the ethernet adapter, as well as reinstalling/updating all drivers for it.The network diagnostic tool turns up with a message that says the connection between either my ethernet adapter or router and the Internet is broken. No matter what I seem to try, I can't get my connection to go back to it's normal 'dkm2' connection and stop giving me a generic, disconnected 'Network'. I can't figure out what could have changed. All that happened was the disabling and enabling of Local Area Connection 3.

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D-Link DIR-655 :: Boxee Causing It To Reset And Disabling Internet?

Oct 28, 2011

Basically, my issue stems from the latest Boxee firmware from 2 weeks ago, that since then, its been causing my DIR 655 to reset itself, thereby disabling my whole home internet.  It eventually turns back on again after a while, but the process doesn't stop.Basically, my DIR 655 is connected, hard wired to my boxee.  I also have a NAS 323 hard wired to my router.  I've had this setup on my boxee, reading all my movies/shows from my NAS without any issues for the past 10 months.  Then the firmware from 2 weeks ago on the boxee started to cause my router to reset.  I thought it was a hardware router failure, so I bought another of the same model to try that out, same thing happened though.  When I rolled back my boxee firmware to the previous version, it no longer causes my router to reset.Now, besides me trying to figure out how to correctly block the boxee from updating on the router.  Is there anything I can do on the router to tell it to prevent it from letting the boxee forcing it to reset?  I'm on High Speed DSL.  My internet provider modem is acting as a bridge to my DIR 655.  Its been working fine for the past 10 months.

I've also done the following:Ensure DNS IP addresses are being filled in under Setup/Internet/Manual? You can find thse under Status/Device Info/Wan section. Turned off ALL QoS Turned off Advanced DNS Services if you have this option under Setup/Internet/Manual.Turned on DNS Relay under Setup/Networking.Setup DHCP reserved IP addresses for all devices on my router.Ensure devices are set to auto obtain an IP address.I have Set Firewall settings to Endpoint Independent for TCP and UDP..

Basically, I've put my boxee back to my previous firmware, and this doesn't cause my router to reset and disable my internet.  But I don't get how/why a firmware update can trigger my router to do this?

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In my webdmz I use 2 ACE 4710 proxys in FT mode. I used a layer 2 switch to connect firewall and proxys together.
 
I would like to eliminate this switch if possible..and connect both 4710's (layer 2) direct to firewall.If I could make gi0/2 - 4 part of the same vlan, then I would be good to go.

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I have a DCP 3925 with 2 telephone and 4 internet ports.So, how can I combine DPC 3925 + E3000 to have more internet ports? and wich one is the best wifi than I can use ??Main router is the DPC 3925, where the internet is connected.

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Dec 18, 2012

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Cisco :: Changing Link Ports To Access Ports In LMS 4.1?

Feb 2, 2012

One of techs accidentally connected two access ports from different switches together.  Since then, LMS is alerting them as being Link ports down.  I tried to default the config and set them to access ports without any success.  what I should do in LMS to recognize them as access ports? 

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Netgear N600 / Will Computers From Switch Have Access To Internet

Dec 12, 2012

I have a Netgear N600 connected to a modem. I want to connect a switch to the Netgear N600, my question is, will multiple computers connected to the SWITCH have access to the internet?

Router : Netgear N600 [URL]

Switch: Rosewill RC-405X 10/100Mbps Switch [URL]

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May 8, 2011

My Dlink DIR-615 had worked flawlessly for almost 7 months now.But since last week it started showing problems.All the computers connected to LAN thru the switch could not access the Internet but the Server(192.168.0.100) which is connected to the DIR-615 could connect to the internet.the above screenshot was captured thru a laptop running Win7 Ultimate connected to the DIR-615 thru WiFi-n.Even after repeated Reloads the same error cropped up in the browsers in the computers connected thru the switch.The computers connected to the switch could access the Internet after I restarted the router.

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Routers / Switches :: Can't Share Internet Access From Cisco Switch

Apr 15, 2011

I went out and bought a linksys 5 port workgroup switch. I tried to hook my internet into it and my other computers into it , THINKING, I would be able to get internet on all. No go. I can get inter net on one, as you can tell. but all others nothing. and to make matters worse i got win 2000, win xp pro, and linux that I like to get online.. I have : renewed IP's assin Ip's refresh, purge dns. rebooted. all and rebooted in diferent orders. double checked connections, tested all lines. The network is on a rj45 ethernet .

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Cisco Switches :: SG200-26 Switch VLAN And Internet Access

May 9, 2012

I start writing this post telling you that I'm not a qualified network admin, so I beg your pardon if I do not use appropriate terms in my question. Also my english in not so good since I'm Italian and my english in almost scholastic.
 
This is the "story" :
 
I bought two switches as described above and actually I have to create 2 VLANS as described below :
 
VLAN id 2     name "Service_A"   ports 1-4
VLAN id 3     name "Service_B"   ports 7-9
 
all other ports can stay in default VLAN1.
 
my network infrastructure have some other very simple swtiches connected and 1 soho router (static ip 192.168.1.1) with dhcp active and ip pool address released from 192.168.1.100 to 200.
 
the SG200-26 have static ip 192.168.1.254   and  192.168.1.253

MY NEEDS:

I need VLAN for privacy matter so all computer connected to ports in VLAN2 cannot see nor enumerate PCs and resources on other VLANs, but I also absolutely NEED that all computer in every ports (and every VLAN even default VLAN1) can access the internet.

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Components Under Routing Or Switch Ports?

May 23, 2011

Basically what is the difference. I'm looking at a breakdown of all the components connected to my switches I noticed half of them about are listing their port all the same as GI1/0/1 (routing port?). Then the rest are all different ports FA1/0/assigned# or FA2/0/assigned# (switch ports?).which are routing or switch ports and why certain ones are under each. It doesnt seem to matter which component it is (computer or printer) because some of each are under routing or switch ports.

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IP Addresses Bound To Switch Ports?

Mar 25, 2012

My university provides one Ethernet port per student in dorm rooms. They assign IP addresses based on which port you connect to and forbid multiple computers connected to the one port using a hub or switch.DHCP leases are 24 hours long, but you can switch out 10 different devices with different MAC addresses and keep getting the same IP. How does this work? Do they just figure that if you're using a hub connecting multiple stations to the one port that they don't care if there's a conflict?

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Cisco Switching/Routing :: Internet Access For 3550 Switch VLANs?

Feb 22, 2012

I have a small cisco switch cluster (seven different 2924, 3524cisco switches) with 3550 as a cluster control which does all the inter vlan routing that works fine.
 
This cluster is in semi production PBX interop testing lab. This is a closed network without internet access and not connected to our corporate network.However now I have to add this capability so some equipment in the lab can get Microsoft updates over the internet.
 
I've created a port on a 3550 (fa0/19) and connected it to another network that has internet access. It picked an ip address and when I'm logged in to the 3550 I can ping hosts on the outside network. However I can't ping any hosts on that network from any hosts that are connected to my vlans.I've tried a few different things, but still can't make it to work.
 
Here is a short version of my 3550 configuration:

!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime
no service password-encryption

[code]....

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Automatic Disable Bombarded Ports In Hp Switch?

May 15, 2012

im working in company that develop high speed networking equimpnet(Mellanox)we develop 4056GB network cards and switches.we have developer network on HP pro curve switchs, the engineering make tets on servers with the high speed network cards and sometimes the test "go out" from the 4056GB network cards and switches and "boombing" the regular network of 1G in hp swiches.i meen every server are connecting with RJ-45 cable for access to the server and the real work is on th Mellanox switches and network cards but sometimes the test "run away" to the ethernet network and 40G traffic are killing the network.function in HP switches that recognize over booking traffic and automatic disable the bombed port?now we have spening tree and brodcaste limit on every switch but its not enough, the big traffic kill the network until we disable the problematic port and igonre the bombing server.we have hp procurve 5610 layer3 switch and pro curve 2510 switches.

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Mar 16, 2012

I want to connect 1 laptop and 2 pc,s to a switch via wired ports. Laptop has WiFi Internet. I DO NOT want internet going to the PC's. Question is will this set-up work for me. all 3 are windows 7

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Mar 10, 2011

I have a 2811 router with a 9 port switch module and a four port ISDN module.  The ISDN Module is our connection to the outside world.  FE 0/0 and FE 0/1 are connected to separate networks and both route our the ISDN connections.We are getting a new satcom system that consists of a modem, antenna control unit (ACU), and an antenna.  The ACU and the modem communicate accross Ethernet and are generally hooked to a switch.  Anything computer hooked to the switch can simply use the modem IP as it's gateway and be surfing the Internet without much hassle (just need the correct DNS addresses).I'd like the networks behind FE 0/0 and FE 0/1 to be able to route out the satellite modem for their Internet connection -- when the satellite is available.  Is it possible to put two switch ports in a VLAN (one for the modem and one for the ACU), give the VLAN an IP in the same subnet as the modem and ACU, and then tell the router to route traffic out the modem IP address ?

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Nov 9, 2011

I like the SG-300 switches for SMB and I'd like use them in our network. Design is quite simple just 6 SG-300 switches connected to one central switch using SFP ports (using 2 port trunks) so I need 12 SFP ports and this is my question. Could you recomend me switch with more then 12 SFP ports from Cisco for this SMB network ? I don't know all the Cisco product lines and I can't find it.

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Nov 14, 2012

I'm having issues getting the ports g3/5 and g4/5 from inactive to notconnect.
 
I have tried the hw-module uplink select all in the global configuratio, but it's not working, getting a : % Invalid input detected at '^' marker. Message every time.
  
This what I have:
 
Power consumed by backplane : 40 Watts
Mod Ports Card Type                              Model              Serial No.
---+-----+--------------------------------------+------------------+-----------
1    48  10/100/1000BaseT (RJ45)                WS-X4548-GB-RJ45   JAE152101QK

[Code].....

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Cisco :: 3750 Switch - Connectivity Lost For Some Ports?

Mar 8, 2013

In my 3750 stack switch there are more than 10 L3 vlans currently in use.In that only one vlan for example vlan 11 (we given up link directly to the nodes connected to that ports which is in vlan 11)losing connectivity for sometime and again connectivity restored.Except Vlan 11 all other vlans are working fine. When we troubleshooted the issue some of the ip's able to ping and some not able to ping. checked the interface status of that ports (no crc and input errors) and port is in up status only.we also checked cpu utlilisation ,device uptime, all are no issues found. am sharing my sw basic config and one interface status at the time of issue.But only one port learning more than 50 Mac-Addresses dynamically.and am learning mac address violation in another port which is port security and storm control enabled on that port..Its seems to be any attack or something else????

interface GigabitEthernet1/0/20
--More-- description
switchport access vlan 11
switchport mode access
spanning-tree portfast
logs:
Mar 8 05:58:25.848 IST: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0026.0a18.8218 on port GigabitEthernet1/0/16.
Mar 8 05:59:25.862 IST: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0026.0a18.8218 on port GigabitEthernet1/0/16.

AT the time of issue interface status:

sh int gi2/0/14
GigabitEthernet2/0/14 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0026.ca46.5c8e (bia 0026.ca46.5c8e)
Description:
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,[code]......

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Jan 19, 2011

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Gi3/0/9                      connected: T 7          a-full a-1000 10/100/1000BaseTX
^
 
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