All Questions
16,224
questions
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answers
4
views
How to do VNC w/ firewalls?
I successfully use VNC to connect to my computers on other networks, and in those situations, I either have control of the firewall or am using a VPN to connect in. But I'm wondering how I could help ...
- 101
0
votes
0
answers
4
views
Connect two different network
I have two broadband connections at two different places. The one at my office also have free calling facility. I can connect to it with Zioper on my mobile phone when i am at my office. But I want to ...
0
votes
0
answers
5
views
Debug slow home network
I don't know how to approach this problem. The TL;DR is that my internal home network is "slow". Here is the setup:
I live in the UK. I have a Sky ER115 router
Directly plugged into the ...
- 101
0
votes
0
answers
3
views
How to connect iPhone hotspot to range extender using ethernet? Is this possible? [closed]
How to connect iPhone hotspot to range extender using ethernet? Is this possible?
How can I use Ethernet to extend my iPhone hotspot? Is it possible?
Hi everyone,
I want to use an Ethernet cable to ...
- 101
0
votes
0
answers
6
views
Unifi APs connected through Fortigate switch
I have several Unifi AC-Pro connected to distinct ports within a single software switch on my Fortigate firewall. When a client device roamed to another AP it lost connectivity due to Unable to obtain ...
- 101
0
votes
0
answers
5
views
How conferences are organized in the MGCP protocol?
I need to collect information about an MGCP conference in my program, but I can't figure out how to link multiple endpoints into one entity.
I assume that several endpoints connect to one, and the ...
- 101
0
votes
0
answers
7
views
How do i add a host to a LAN from another router outsite the LAN
i know this may sound silly. But I'm still a student. I'm doing a test and i have to add a the google server to R1 LAN (172.26.13.0/24) from R3. The server is connected to R3 trhought a switching port ...
- 1
-1
votes
1
answer
19
views
What are some of the best practices when changing to TenGig interface from the Gig interface on a Switch?
Posting this to understand and learn from experiences of experts. What are some of the best practices to be kept in mind when changing to TenGig interface from the Gig interface on a Switch?
- 51
0
votes
1
answer
41
views
Interior vs Exterior Gateway Protocols
I'm new to Networking and I was reading about the Interior and Exterior Gateway Protocols ,but i couldn't understand some points , as stated in a reference:
IGPs are designed to work in private ...
- 133
0
votes
0
answers
20
views
PFSense - Deliver IPv6 over OpenVPN Tunnel
I have an Gateway router and I am currently trying to set up a PFSense + OpenVPN Tunnel. However I am having problems with IPv6 connectivity.
The FGW is configured with the DMZ for the PFSense ...
- 113
0
votes
0
answers
22
views
VPN compatible with China's firewall [closed]
Some of my colleagues are working from China and we are looking for a compatible VPN provider for my colleagues.
The requirement is to connect to the servers in public cloud providers
Access the ...
0
votes
0
answers
18
views
using Internet of specific modem through proxy [closed]
I have 1 router and n modem and proxy has been set through them like following figure and the proxy address is like 192.168.121.40:3041, how can I make sure that I am using modem 1 Internet not using ...
- 101
0
votes
1
answer
24
views
Why do we need L7 reverse proxy for increasing the limit of max TCP connection to the backend?
I stumbled upon a YT video which explains that there's technically no limit to the number of connections that can be opened between the clients and servers even if there's a reverse proxy between them....
- 143
0
votes
0
answers
9
views
DNS issue after i plugged in a router [closed]
Today's morning, I plugged in a tp-link router (Archer MR200) to act as a switch to an Ethernet point at the office, configured a pc to get a static IP (10.100.0.43) and my mobile (10.100.0.44) and my ...
0
votes
1
answer
22
views
Bittwiste unexpected behaviour when changing MAC address
bittwiste version 2.0 libpcap version 1.9.1 on Catalina vía Homebrew
I have a pcap file foo.pcap with conversation between MAC addresses a2:f6:51:d0:0e:13 and ac:93:c4:be:6b:8c
I run:
bittwiste -I ...
- 101
0
votes
0
answers
14
views
Understanding Cisco MIBs [closed]
I have setup my Cisco C9300 switches to send SNMP V3 traps to my log server as a backup for syslog. When it sends messages it just sends numbers with no actual message. I know I need some MIB files ...
- 461
0
votes
1
answer
56
views
IP and Ethernet endianness
I'm completely new to the topic, I've read that Ethernet sends Bytes in a Big-Endian way, but that bits are sent with Little-Endian. I've also read that IPv4 uses Big_endian order. So my question is, ...
- 1
0
votes
0
answers
9
views
How can cameras with RTSP like Tapo cameras be accessible from the outside? [closed]
I wanted to know how these cameras work when it comes to redirecting traffic outside the local area network (LAN) of your home. In other words, you connect them to your phone, configure them, connect ...
- 101
0
votes
0
answers
20
views
How do you set an A record for any shared host? [closed]
I'm trying to use an A record to redirect my domain to a separate domain that I own. This process has worked fine with DigitalOcean Droplets -- I just add their IPv4 address in the A record and the ...
- 1
0
votes
0
answers
18
views
locating servers used by Bitcoin mining pools [closed]
I am researching Bitcoin mining pools and want to geolocate their servers. Pools publicly provide their server IP addresses so that miners can connect to the pool however many pools use the Cloudflare ...
- 1
0
votes
0
answers
24
views
Cannot ping interface although in same subnet? Why? Debug ip packet gives encapsulation error
I have the following setup:
From Laptop Mgmt2 (bottom right) I want to ping Se/0/0/0 on R1. I can only ping S0/0/0 on ISP router, which is in the same subnet.
If I enable debug ip packet on isp router ...
- 295
0
votes
1
answer
33
views
OSPF Equal Cost Load balancing with External E2 routes
I am learning about OSPF external routes (E2) and I've decided to lab them up. Here is my topology.
192.168.1.0/24 and 192.168.2.0/24 are just loopbacks configured on the ASBR.
My book states that ...
- 699
0
votes
0
answers
7
views
Can old wi-fi devices get WPA2 PMF support? [closed]
Is it possible that old wi-fi devices can get WPA2 PMF support just by software (e.g. linux driver) or is it required to be enabled by the manufacturer of the device via hardware/firmware?
In my case ...
- 1
0
votes
1
answer
22
views
Recognizing the next protocol in MPLS header
How can I know what is the next protocol in MPLS header?
I do know that MPLS header does not provide any information about the next protocol,
But I somehow need to know how to recognize it, as I am ...
0
votes
1
answer
17
views
Wifi air encription
I have a scenario where a Network Access Control (NAC) controlls the acces to a SSID (username and password), so the wifi controller doesnt have a password for it. Obviously the mobile devices ...
- 101
0
votes
1
answer
26
views
Why does pfSense require a DNS access list entry when all interfaces are selected?
Netgate 4100
v23.05-RELEASE
The DNS Resolver was only working on LAN 1 but not LAN 3 (physical nics, not vlans). I added an access list rule as suggested here to grant LAN 3 access and now ...
- 101
0
votes
1
answer
30
views
SSID password vs pre shared key
Can someone please explain in very straight forward terms the difference in the SSID password vs a pre shared key?
- 3
0
votes
0
answers
14
views
Understanding message exchange during ETH link establishment [closed]
I am trying to understand the exact workings of IPv6 during the establishment of links. For this reason, I am using a network emulator named CORE (http://coreemu.github.io/core/).
The setup is minimal,...
- 101
0
votes
2
answers
71
views
Is there a way to find all MAC addresses in an Ethernet network?
How can I find all MAC addresses connected to a LAN network? Is there a way or protocol to do this?
- 101
0
votes
1
answer
38
views
Routing table routes with different administrative distance
When a router receives two routes from the same routing protocol to the same destination network, it uses the Metric to decide which one to add to the routing table, so if Metric was different it will ...
- 15
-1
votes
0
answers
38
views
In the 802.11ax wireless networking standard, how exactly does a 40MHz-wide channel allow higher data throughput than a 20MHz-wide channel? [closed]
I have read that by increasing the number of frequencies on which you can send a signal, you are increasing the ability to send additional data on each of those frequencies. But how is that achieved?
- 1
0
votes
2
answers
16
views
link between firewalls and cpe internet dedicated or on internal vlan
We have 2x datacenters in which we have 2x firewalls and 2x internet routers.
to allow the firewalls to reach both the internet routers there is a dedicated line between the datacenters
For budget ...
- 1
0
votes
1
answer
43
views
Doesn't OSPF Have Auto Summarization?
I asked AI if there is a command in OSPF for auto summarization like RIP and EIGRP. Here is the answer:
"No, OSPF does not have a command like RIP and EIGRP that enables or
disables automatic ...
- 253
0
votes
1
answer
23
views
input discards on Arista 7124SX-F
im seeing input discards on one of our uplink on Arista SW
if i run sh platform fm4000 interface ethernet 22 counters verbose command it is showing smp0DropPkts which is equal to the input discards.
...
- 101
0
votes
1
answer
18
views
Is there a comparable technology to Cisco's DTP from other network vendors?
Is there a substitute for Cisco DTP technology from other vendors? And if so, which ones?
Didn't find anything on google.
- 1
0
votes
1
answer
23
views
Web Access Certs No Secure Though It Is
I have a Cisco C9300 and I am securing the access to the web console to it with the HTTPS server. I created a trustpoint for our CA and imported the CA cert as well as created a certificate for this ...
- 461
0
votes
0
answers
10
views
Switching Methods Calculation Query [closed]
What formula do I need to calculate the waiting time for circuit switching and packet switching. I cannot find any resources online for this hence I am resorting to this. Help would be greatly ...
- 101
0
votes
0
answers
16
views
Bridging various interface types (eth/wlan/wwan) [closed]
I'm trying to make a bunch of bridges between certain interfaces on an Linux device. But I'm learning that this doesn't go as easy as I expected.
Possible scenarios:\
My device is connected to ...
- 1
0
votes
0
answers
14
views
With two houses and two internet connections, I want to use site A's internet from site B via a VPN, preferably wireguard [closed]
I have two homes, both of which have internet. Let's say that I am currently at "Site A", but I want to connect to the internet via "Site B", in order to take advantage of Site B's ...
- 101
0
votes
1
answer
29
views
Can I use VRF to loop around traffic through a firewall?
I have a firewall that's in-line of the default gateway for a network. It's a multi-layer filtering beast it handles all the NAT in the network (public and internal 1:1) and the access to DMZs. ...
- 85
0
votes
0
answers
12
views
A windows client unable to connect [closed]
One of our client is unable to connent to our ipsec vpn server. It seems it happend without any change on the client or on the router side. The vpn server is running on an asus router.
Is there a way ...
1
vote
2
answers
416
views
Breakout from 400Gbps to n*25Gbps
My servers are currently have 25Gbps NIC, but switch ( Cisco Nexus 9300 series) has only 400Gbps.
I would like to be able to break out the 400Gbps connection into four 25Gbps connections. Is this ...
- 115
0
votes
0
answers
14
views
Finite-state Markov model for Rayleigh fading channels [closed]
I try to form a finite-state Markov channel (FSMC) model to represent Rayleigh fading channels. Then, apply this FSMC mode to my problem. I divided the continuous channel gain values into 4 ...
0
votes
0
answers
9
views
Is there a WireGuard UI that can handle multiple groups? [closed]
I'm trying to set up a corporate VPN server (on a Debian11 VPS) that:
can connect 300 clients separated in 100+ groups, 10.10.2.0/24 , 10.10.3.0/24, ...
each client with fixed IP
but none of those ...
- 101
0
votes
0
answers
10
views
issue with vpn not connection on 2019 server and cannot able to connect error while connecting is [closed]
the remote connection was denied because the user name and password combination you provided is not recognized or the selected authentication protocol is not permitted on the remote access server
0
votes
1
answer
33
views
MAC Authentication using RADIUS with redundant links to hosts
I am considering using a RADUIS for MAC authentication. But the concern I have is that in my network each host has two links going to two switches (SW-A, SW-B) the link going to (SW-B) is a "...
- 5
0
votes
1
answer
36
views
Is the security of BGP using a pre-shared key dependent on the security of MD5?
The german wikipedia article to BGP states (translated):
In the basic configuration, a BGP-Router is susceptible to spoofig
attacks, through which the attacker can manipulate the routers. By using
an ...
- 3
0
votes
0
answers
21
views
cisco business dashboard probe scanning outside of given range
we're deploying Cisco business dashboard with dedicated probe server in our LAN.
I've managed to make everything work, but one thing bothers me.
I configured the probe managed network to only discover ...
- 1
0
votes
0
answers
12
views
Access list with two pcs and two routers [duplicate]
I have Router0, on G0/0 connected PC0 with ip192.168.1.2 /24, on Router1 on G0/1.3 connected PC1 with network 192.168.3.2 /24. I need PC0 to be able to ping PC1 and PC1 cannot ping PC0.
I have tried ...
0
votes
1
answer
34
views
Allow active connections in firewall on multiple BGP connected routers
We have a network on its own AS with 2 routers connected to 2 AS via BGP (full routes).
The routers also both have a firewall on board that by default drops all traffic, except the one allowed. We ...
- 103