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1500 questions
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1 answer

How do you configure a TACACS+ tac_plus server on Ubuntu 16.04 that authenticates against Microsoft Active Directory?

How do you configure a TACACS+ tac_plus server on Ubuntu 16.04 that authenticates against Microsoft Active Directory?
dt1235
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Calculate the FCS number from a frame ethernet

I've the following frame ethernet: 08 00 20 0A 70 66 08 00 20 0A AC 96 08 00 45 00 00 28 A6 F5 00 00 1A 06 75 94 C0 5D 02 01 84 E3 3D 05 00 15 0F 87 9C CB 7E 01 27 E3 EA 01 50 12 10 00 DF 3D 00 00 20 20 20 20 20 20 9B 52 46 43 Where 0x9B524643 is…
Davide
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Lab: I need to determine information about a device on a specific port of a Cisco multilayer switch

I have a Cisco Catalyst that has a port that is up up, and the device does not show in the ARP table. The MAC address-table shows a MAC address for the port. What can I do from that switch to find out what the device is?
Kendrick
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The use of DMZ and single firewall design

Apologies in advance if this is a stupid question. I have just started exploring network designs and firewalls. I have come across a network design where there is single firewall between internet, DMZ and the internal network. From my…
DefenderAtkins
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2 answers

Why can I ping IP addresses from 127.0.0.1 to 127.255.255.254?

I thought that the loopback IP address of my machine is 127.0.0.1. I do not understand why am I able to ping IP addresses until 127.255.255.254.
yoyo_fun
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6
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1 answer

Hp Procurve Action ignored in download mode

From an tftp server I'm trying to import the config to startup-config using copy tftp startup-config 10.0.0.10 5006zl.cnf The switch asks for confirmation y/n and when pressing y it just aborts saying that the config could not be loaded. show…
Valentin Bajrami
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2 answers

Do i need to configure VLANS on my router/firewall or just the switch?

I finally took time to map my entire shitty network to understand exactly what the guy before me did, and i must admit i'm a little bit surprised even if i'm not a network expert... Just take a look at That Diagram i made so you can have a better…
Thierry Dalleau
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2 answers

What is the difference between L2TP vs GRE

Can anyone clearly explain that what is the difference between L2TP and GRE tunnel? Is L2TPv3 Any different I am trying to understand where these protocol are used and why we use L2TP instead of GRE in some cases and vice versa. Thanks
Terminator
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1 answer

Cisco 2690x-Flex stack not working

I have 2 identical Cisco 2690x with flex stack plus modules installed in both. I have provisioned the first and it is up and running. When I add the second to the flex stack module and turn it on, it powers up and the flex stack indicator is green,…
Chris Kooken
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6
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3 answers

Network Tunneling - why do we need it?

I have researched the topic of Network Tunnel but the information on this is rather confusing and inconsistent. So could someone please explain: In general, What is tunneling? Is it simply an act of encapsulating a packet with another header and…
user34639
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Router Ethernet port ip no accessible from clients

I have this setup with a hybrid of equipment's from Cisco and Ubiquiti Edge routers and Vyos. My Cisco Nexus configured with HSRP with all the SVI's on 192.168.1.243 as the active on HSRP and SVI's all on area 0.0.0.0 with SVI interfaces on…
Usaia Tawakevou
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6
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4 answers

Ping a private IP address in another network

We all know that PCs on a LAN use private IP addresses such as 192.168.2.3, etc. Now my question is, how can a PC say mine having a private address of 192.168.2.3 communicate with other LAN PC having a private address of say 192.168.2.5 because not…
RRHS
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6
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3 answers

How IP helper address works?

How IP helper address works and what is the difference between dhcp and IP helper-address .please explain in brief.
Harsha D
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6
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2 answers

Fortigate 100D internet on VLAN wan port

I am fairly new towards Fortigate firewalls and I am trying to set up one FortiGate 100D running firmware v5.0 as a router for a hotel network. I have 2 ISPs using PPPoE connection that runs on VLAN 500. I created VLANs for both wan1 and wan2…
Kenny Yap
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6
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3 answers

MPLS traffic engineering

While studying MPLS I couldn't understand it's one basic functionality. Mpls creates tunnel interfaces or pseudowires between label edge routers. To achieve traffic engineering I can set different limits on different tunnels. But what decides which…
john
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