Questions tagged [ieee-802.1x]

For questions about the 802.1X protocol for port-based network access control.

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24 views

Network Protocol vs Framework?

I've been a network engineer for almost 4 years now. I thought I understand what a network protocol means. but now I'm having doubts. For me, Ethernet is a protocol used at layer 2. there would be ...
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1answer
11 views

is DIAMETER-EAP Authentication method mutual or one way?

i'm studying the DIAMETER-EAP authentication method and i would like to know if this method can be considered mutual authentication or "one way" authentication. In my opinion this is one way ...
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What's the difference between DIAMETER and 802.1X Authentication?

I'm studying the 802.1.X authentication guidelines and the DIAMETER protcol as successor of RADIUS but i can't figure out what are the main difference between pure 802.1X Port-Based Authentication and ...
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802.1x and mab with ip phone and pc beyond it

I have 2 switches . Hp2620 and 2610. I have an ip phone connected to the switch(i use mab to authenticate) and pc(connected to the ip phone) with dot1x. Each work individually bu they dont work ...
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1answer
39 views

MACsec Switch-to-Switch authentication/encryption

I have some questions regarding MACsec IEEE 802.1 AE-2018 and PNAC IEEE 802.1X-2010. As I have heard there is no swich-to-switch protection with 802.1X-2010 by this standard I want to know where is ...
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60 views

Compatible peap+freeradius+openldap

On my new job I have inherited a service wpa2-enterprice with peap+freeradius+openldap. As NAS we use ArubaIAP with enabled function "eap-termination". And this bundle works well! Little deep: In ...
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1answer
478 views

Difference between 802.1X vs 802.11 standards

What does the x means in 802.1x and which are the differences between the 802.1X and 802.11 standards ? Can you explain to me ?
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1answer
66 views

Vlan Command Issues on Cisco Switches

I'm new to cisco equipment. I have GNS3 emulating an L3 switch whose image is "i86bi-linux-l3-adventerprisek9-15.5.2T.bin". I want to create a cable network with 802.1x and vlan authentication. For ...
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1answer
111 views

Netgear GS608v2 switch + 802.1x [closed]

Does anyone know what the difference is between GS608v2 versus GS608v3? I started noticing that machines connected to GS608v2 were not getting full network access (no internal connection) when 802.1x ...
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1answer
80 views

802.1x Multiple Devices

I'm in the process of implementing wired 802.1x. I've been testing with HP 2530 switches and everything seems to work okay enough. On a different site I use Brocade (now Ruckus) 6450 switches. I ...
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152 views

802.1X MAC auth : Dell N2048 switch returns malformed EAP packet

I'm trying to set up MAC authorization with 802.1X using FreeRADIUS, a Dell N2048 (DN OS6.3.3.9) switch as the authenticator and a Ubuntu machine as the supplicant. I've followed this guide for ...
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2answers
97 views

Multiple 802.1x clients, single port support on a Cisco 3750 switch?

I'm thinking of using our Cisco 3750 switch with our RADIUS server for 802.1x authentication on our Ethernet ports. If I enable 802.1x and a user connects a switch to their Ethernet jack, and the ...
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1answer
51 views

Radius and certificates

I'm trying to understand something. When a client and the radius server start the connection how does things work? Is it always a tls connection and does it use the symmetric encryption after ...
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1answer
95 views

using 802.1x with nic teaming

I am working on a project which is mandatory to have each pc configured with two network interface cards as a nic team. I want to use 802.1x for authentication with a radius server like cisco ISE. My ...
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1answer
88 views

How to change ip TTL=1 on flat network for security [closed]

Working on a network at an high rise apartment complex. They have a core router/firewall acting as dhcp server and about 7 switches (all l3 switches). They have a few vlans to segment traffic based of ...
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2answers
79 views

802.1X Auth for Clients and Servers

I'm about to introduce 802.1X Authentication to my current network for wifi and wired connections: My Setup: I have a Windows Domain Controller and I wanted to use the Network Policy Service for ...
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1answer
50 views

secure authentication over LAN 802.1X

secure authentication over LAN I have installed FreeRadius Version 3.0.12 server, we debian 9.4.0, and I want to secure my LAN, that means, nobody can connect to the LAN if its MAC address is not ...
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1answer
152 views

Cisco Nexus 5548 802.1x Guest-VLAN not available

I'm trying to configure a Cisco Nexus 5548 for 802.1x using MAC Authentication Bypass. I'm finding that there isn't an option to configure the guest VLAN in the event that authentication fails. ...
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1answer
214 views

Whats the meaning of `802.1Q tunnel customer VLAN mapping` and `802.1Q tunnel provider VLAN mapping`?

Whats the meaning of 802.1Q tunnel customer VLAN mapping and 802.1Q tunnel provider VLAN mapping? Shows 802.1Q (QinQ) tunnel information. 802.1Q tunneling allows layer 2 VPN connectivity between ...
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2answers
92 views

What is the purpose of 802.11 authentication? [duplicate]

Why does client authenticate before associating with the AP. What does open system authentication even achieve. I fail get an accurate reason from my web searches.
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2answers
1k views

Does 802.1Q protocol will remove the VLAN tag in the received place?

Does 802.1Q protocol will remove the VLAN tag in the received place? Such as the VLAN 10 trough 802.1Q protocol to pass frames. the 802.1Q will add 802.1q header(tag) and recalculate CRC/FCS like ...
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0answers
141 views

Network segmentation with VLAN and MAC auth: thoughts about implementation

Currently we have a medium-sized, flat network with some DHCP pools. This configuration isn't satisfying us anymore, as everyone can see everything on the network and it may leads to security issues. ...
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1answer
641 views

Cisco 2960-S switch with MAB and Packetfence Web Authentication

I am trying to set up Packetfence In my corporate environment for guest users, with MAC access bypass. i have done everything like in the official Packetfence installation guide https://packetfence....
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2answers
1k views

Mitigating 802.1x bypass by transparent bridging

The talk DEFCON talk "A Bridge Too Far" details a means to bypass wired 802.1x network access controls by setting up a transparent bridge between a genuine machine and the network. Once authentication ...
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1answer
231 views

Guest VLAN doesn't work at wired connection on HP 1920 JG927A

I'm tring to get properly working configuration on HP 1920 with dot1x and guest-vlan. All my authenticated computers works fine also auth-fail vlan is working properly. Any One has idea what can be a ...
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2answers
651 views

When doing 802.1X port authentication, how does the switch know how reach the authentication server?

So, while I get the supplicant-authenticator-authentication server structure (for the most part), the part that bugs me is the step when the switch starts communicating with the authentication server; ...
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3answers
6k views

802.1x and use Google G Suite Directory as LDAP

Has anyone managed to authenticate yours to the network via 802.1x using Google Directory? I have a case where whole company is using Google Apps and G-Suite with a custom domain and they would like ...
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2answers
870 views

Will all switches pass 802.1x EAP seamlessly? Any caveats?

We have a selection of Unifi, Meraki and Arista switches. We're currently trying to sort out our 802.1x/RADIUS infrastructure It seems like Meraki has the best 802.1x support (e.g. supporting multi-...
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1answer
157 views

802.1X on wired networks

Suppose i'm protection physically accessible RJ45 sockets in offices that are connected to a switch (Cisco SF220) with 802.1X port based authentication and a radius server. Authorized devices have ...
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1answer
713 views

Dot1x re-authentication for computers connect via IP phone

I am currently working on dot1x solution for wired users. Configuration we have is working fine for most of our use cases, except one. We have working solution for users that are connected to the ...
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1answer
1k views

Can't use “dot1x” command in Cisco Packet Tracer

I am trying to configure 802.1X authentication on a Cisco switch 2960 in Cisco Packet Tracer software. Here I found the offical guide: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/...
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2answers
350 views

Juniper: WakeOnLan over 802.1x without using default VLAN

Case We have a working 802.1x configuration on all our access ports. I want to enable WakeOnLan, but have no idea, how to target computers with Magic Packet. Tests We tried to send Magic Packet ...
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1answer
66 views

What are connectivity associations in LAN? - IEEE Std 802.1X-2010

In IEEE Std 802.1X-2010, Appendix D, Section D.8, there is the following phrase However simple or complex, the establishment of a connectivity association for connectionless data transfer ...
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1answer
981 views

Is PMKID same for a specific client when it is roaming from AP1 to AP2 using WPA2-Enterprise?

I have two access points (APs) setup with the same SSID name and using the same freeRADIUS server for station authentication. I have read Cisco documentation about fast roaming. So I have this doubt ...
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1answer
328 views

AAA & NAC: Use last authorized vlan of a port, if AAA-Server is dead?

I'd like to know if there is any way to configure the switch so, that in case the radius-server is dead and devices try to (re)-authenticate the port gets the latest vlan which was authorized on this ...
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1answer
86 views

In 802.11 Wi-Fi, Is it better to be on the same channel as other networks instead of being in an overlapping channel?

While being on the same channel as another network is not ideal is it better than being on a neighboring overlapping channel because 802.11 spec has methods for dealing with co-channel interference? ...
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1answer
132 views

VLAN management in 802.1X

I would like to learn how is VLAN management in 802.1X port based authentication. Are there something specific in 802.1X about VLANs? Because VLAN is also part of Layer 2.
3
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1answer
837 views

How does NAC or NAP enhance 802.1X?

I'm studying about 802.1X port based authentication and RADIUS, and I came across the terms of NAC (Network Admission Control) and NAP (Network Access Protection). As long as I know NAC tries to unify ...
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1answer
819 views

802.1x authentication and dynamic VLAN assignment of VLAN tagged frames

I want to implement a Network Access Control ( NAC ) infrastructure in my LAN. My topology is something like: PC -> ( Untagged Port - PVID 100 - Non 802.1x capable smart switch ) -> ( Hybrid port - ...
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2answers
31k views

What's the difference between RADIUS and 802.1X Port-Based Authentication?

As long as I know RADIUS is a type of authentication protocol, where for example if someone wants to use a switch, it first of all needs to enter his/her credentials, and properly authenticate himself/...
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1answer
344 views

Can you change your MAC and IP address on 802.1X port?

It's related to this question: Is 802.1x port security enforces IP uniqueness If you have 802.1X port security can you change a MAC address of your device (to some other unused MAC address)? Will it ...
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1answer
78 views

Is 802.1x port security enforces IP uniqueness

I know that 802.1x can track MAC addresses. If MAC address is used on one port then you can prohibit it from being used on another port. Can 802.11x protocol do the same thing for IP addresses? My ...
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1answer
498 views

VxLAN optional outer 802.1Q purpose?

So, I've been checking Google along with the RFC 7348 about VxLAN functionality. I believe I do have a good grasp of what the purpose of the protocol is, what it does and how it does it etc but I fail ...
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1answer
151 views

802.1X for Wi-FI

I have a hidden SSID network. I know that although the SSID is hidden, someone can sniff the Wi-Fi channels to get my SSID, and with that SSID he can use some OpenWRT-ish things to spoof my Wi-Fi ...
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1answer
669 views

Can I use 802.1x and LACP to secure the networking infrastructure?

Suppose you have a network like this: +-------------------------+ +---------------------------+ | | | ...
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5answers
9k views

Propagate VLAN through VPN (IPsec)?

I have a question about connecting two LANs (logically same LAN) over a VPN. In picture below you can see overall representation of our implementation. Description: On each side, we have distinct ...
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0answers
434 views

Configure a DLINK AP to connect to 802.1x LAN [closed]

My hostel is in the process of implementing AAA using 802.1x, PEAP + MSCHAPv2 on Ethernet. I have a DLINK 850L router, is it possible to configure it to connect to 802.1x? DD-WRT is not available for ...
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8answers
8k views

How can I stop an intruder plugging into an Ethernet wall socket getting access to the network?

Is MAC address filtering the most suitable option to prevent someone connecting their own device to the network by plugging into Ethernet wall sockets? What if they unplug a device and clone its MAC?
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1answer
1k views

Cisco 3750 802.1x — Invalid Eapol packet length

Having a tough time here getting EAP-TLS to work. I am converting from a EAP-PEAP solution to EAP-TLS and have done the steps required for PKI so as to be not a certificate issue. (server and client ...
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1answer
1k views

EAP packets generated for plain MAC-based authentication

I wanted to implement trivial MAC-based authentication on some Cisco SG300 (small-business) switches. The client doesn't ask for auth but I simply want the client's MAC address to be authenticated, ...