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How to know port number of any URL, for example what is port number used by google.

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Cisco Switching/Routing :: Cannot Find Port Number From MAC Address Using SNMP With 3725

Dec 2, 2012

I'm developing a project where I use the SNMP protocol to discover the network. By discovering the network I mean go through all the routers and switches and retrieve the IP routing table from routers and the forwarding table from switches. With the routers I have no problem. For the switches I need to know for each port the MAC addresses and the Vlans. Basically it's use SNMP to find a port number from a MAC address. To do that i followed this tutorial: [URL]
 
The problem is that I'm using a Cisco 3725 Router with IOS 12.4 (21) and a NM-16ESW module to work as a Switch and when I use the OID .1.3.6.1.2.1.17 corresponding to the BRIDGE-MIB as it follows:
 
snmpwalk -v2c -c myrouter 10.1.1.5 .1.3.6.1.2.1.17
 
it returns: 
SNMPv2-SMI::mib-2.17.1.1.0 = Hex-STRING: 00 00 00 00 00 00
SNMPv2-SMI::mib-2.17.1.2.0 = INTEGER: 0
SNMPv2-SMI::mib-2.17.1.3.0 = INTEGER: 4
 
From this I guess there's no information on the router about Vlans or anything. Other thing is that when I use community string indexing it returns a timeout. My theory is that this version doesn't support indexing but I don't know.
 
how can I get the Port Number from a MAC address from this "switch" (it's a router working as a switch) using SNMP?

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Jan 18, 2011

I am trying to set up a Linksys WAP4410N on our network.  We are trying to run it using unrestricted access, but it is requiring a pin number.  The prompt I get when trying to connect to the WAP is that the number should be in the original documentation.  I can not find the original documentation and I cannot log into the WAP to find the PIN number.

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Feb 9, 2012

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Apr 13, 2011

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Feb 15, 2013

I changed my router from Belkin F5D 7633-4 (G) to Belkin F5D 8636-4 v2 (N) on the 7633 I was able to set up virtual server page and access my CCTV cameras remotely with no problem but on the 8636 with the same info into virtual servers page I get "No 1 WAN address is invalid".The format of the page is slightly different the 7633 required "inbound Port" number to be put in twice in different boxes side by side and the same with "Private Port".The 8636 has only one box to enter the port number under each heading.

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Dec 23, 2012

I would like to understand how public IP works in remote access. I do have belkin router and when I access it remote I type my public IP and after it the port number for example xxx.xxx.xxx.xxx:80 and if I would like to access an IP cam remotely in the same network i would do the same thing xxx.xxx.xxx.xxx:5656 (public IP). I do know my Public IP is unique.Thus, its quite logical I can access my devices remotely. my understanding of the port number is application specific that addresses packets in different applications in the same computer. For example port 80 is for HTTP connection used browsing the web, for chatting in MSN i will use different port number specifically for MSN...etc. my question is how I can access my belkin router remotely by typing the public IP and the port number knowing that the port number is application specific not device specific? My second question is, is it possible to access two routers in the same network remotely?

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Cisco Wireless :: 1813 Radius Port Number In WLC

Apr 19, 2012

End user has APs config with Radius server, working fine
 
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In some weeks all APs will be migrated to WLC. My doubt is regarding the config in RADIUS Athentication Server port number field. There is only one option for adding.Which port number should I use? , When a new server is added always show 1812 port number; documentation states that is for authentication and 1813 for accounting.

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Oct 30, 2012

We have IP device on the farm switch(cat6500, which is an access layer siwtch), with the gateway on the core switches (Nexus7000), on the core when I do show ip arp, I found the mac.But when I do sh mac add add of that mac there is no port attached to that mac.
 
Since that particular vlan only resides on the cat 6500 and two cores, so I logged in to the 6500, and when I show mac- in that vlan, I didn’t find that mac addresss. Instead, I found another mac address with last 8bit are the same of that mac.
 
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Nov 26, 2011

With basic "Wizard" setup I got DHCP and port 80 for the camera.  It was working just fine with MyDLink and locally with DLink-ViewCam software and some local test web pages. However, we have a wireless printer on that router which also uses port 80, so when it was installed we set up a "port forward" for port 80 traffic to it for administration from other subnets.  How MyDLink website is able to tunnel through our hardware firewall and the wireless routers firewall to  communicate with the camera is not clear to me (perhaps someone can send me a link to an explanation??), but it works...Thus, to allow access to the camera from other subents, I wanted to change the camera's port from 80 to another, say 8181 and set up the appropriate "port forwarding for TCP and UDP.  All of the steps below were from a PC within the camera's subnet/router so port forwarding is not an issue

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Cisco Switching/Routing :: 1801 Not Showing Any Port Number?

May 12, 2012

I have configured the following access-list on routers fa0 interface (i am using 1801)
 
access-list 111 permit ip any any log
 
and applied it in "in" direction on Fa0 interface.
 
Now when i am sending ssh packets to this interface its showing below
 
*May 14 05:09:00.104: %SEC-6-IPACCESSLOGP: list 111 permitted tcp 172.18.128.2(0) -> 172.18.128.146(0), 1 packet
 
why its not showing any port number ?

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Cisco :: WAP321 - Forgot Port Number For Radius Settings?

Apr 22, 2013

Where can you set the port numbers for auth and accounting on a WAP321?I can see where to set up to four IP addresses for the servers themselves, shared secret etc - but nowhere can I see where the port number is configured.
 
In a day and age of exceptionally limited IP resources, cloud hosted services and even just a little "security through obscurity" there are many reasons for needing to set a non-standard port number for the radius server.I'm at a loss how it could be in residential products, but not small business devices?

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Linksys Wireless Router :: EA4500 Maximum Number Of Port Forwards

Apr 19, 2012

Background: currently have a WRT320N, thinking of upgrading to an EA4500 assuming ONE feature has been improved: Port Forwarding.
 
Scenario: Currently I have a WRT320N router, and while it "does everything we need" it has one limitation that is now getting in the way: limitation on number of forwardable ports.  In the port forwarding panel, it has 15 total rows: the first five rows can be enabled for specificaly named services (SMTP, FTP, etc).  The last 10 rows are fully customizable in that we can set the name, ports and protocol. 
 
The problem is that of the 13 total ports I currently need to forward, only ONE of them is listed in that fixed list.  So, sadly, I can only use one of those first five rows.  I've now filled the remaining ten custom rows, and still have need for two additional ports (for now, may need more down the road).
 
Trying to get creative, I figured maybe I could just spill over to the Port Range Forwarding page and add a row or two there.  The only problem: it's buggy.  I've found that if the Single Port Forwarding list is filled, then the Port Forwarding Range entries don't work properly.  For example, if I wanted ports 12345 and 12346 forwarded to 192.168.1.5, they work fine with two single port forwarding entries.  However, if I delete those, add two other port lines I need forwarded (the single list being full again), and add a port forwarding range 12345..12346, they don't work properly, ports just are closed. Only the singles work, the ranges don't.
 
Question: Has the EA4500 resolved this issue and allow for either more lines (i.e. 20 customizable entries instead of 10), or, better, does it just have an [Add Entry] button to allow for additional rows to be created?  In today's day and age, where one single device (such as an Xbox) can take four rows, a 10-row limit is pretty sparse.  Comparing it to some competitors, for example the D-Link DIR-825 (aging, but still great) allows you to add as many as you want.
 
I realize "expensive" firewalls like SonicWall's have virtually unlimited customization, but I don't need many of the additional features and don't want to spend $350 on a "high-end" firewall to solve the problem of needing two more ports open.

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Cisco Switching/Routing :: Correct Number Of Port Asic In WS-X6704-LC

Jan 1, 2012

Clarifying whats the correct # of port asic in WS-X6704-LC?According to the following link (Catalyst 6500 Architectural white paper): [URL]
 
"In the WS-X6704-10GE line card, there are two port ASICs each supporting 2 x 10 Gigabit Ethernet ports"
 
 While in the document: Understanding Quality of Service on the Catalyst 6500 Switch: [URL]
 
Table 10.  
WS-X6704
Number of 10 GE Ports 4
- QoS on 10-Gigabit Ethernet Line Cards (WS-X6704-10GE)
 
So whats correct? 4 port asic or 2 port asic?

# Port ASIC’s on the linecard 4
# Physical Ports per Port ASIC 1

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Cisco Switching/Routing :: Maximum Number Of Sessions For Port Mirroring On 4510

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Are you only able to have two sessions for port mirroring on a Cisco 4510?                  

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