All Questions

0
votes
0answers
16 views

What is an exmaple application using both TCP and UDP? [on hold]

What is an example application using both TCP and UDP? I know DNS (at server side) uses both. (One for Zone-db transfer among severs. One is for client-query response). Do you know any service else?
1
vote
1answer
21 views

Can't ping across router with two interfaces [on hold]

This is the topology I'm working with. In the router, e0 is ether1 and e1 is ether2. LAN_A has a maximum of 96 clients. LAN_B has a maximum of 48 clients. VPC_LAN_A: ip 192.168.10.1/25 192.168.10....
0
votes
1answer
17 views

Difference between various network simulators

What are the main differences between GNS3, Cisco Packet tracer and EVE-NG? Detailed explanations would be appreciated.
0
votes
0answers
6 views

Difference between cognitive radio and roaming in wireless network [on hold]

In CR, secondary users are unlicensed users of a network, say network 1. They can access network 1 for their services in case network 1 has free channels and the users' parent network doesn't serve ...
2
votes
1answer
27 views

Question about Ubiquiti Edgemax switch syntax and VLANs

I've been beating myself over the head with a keyboard trying to figure this out. I'm used to switchport syntax on Adtran and Cisco switches, but I've got this situation with a Ubiquiti EdgeSwitch 48 ...
2
votes
1answer
45 views

How do I know what is the origin IP if I ping from a router to a host of an external network in packet tracer?

When we ping from a router to a host in an external network, how do we know what is the origin IP of the packet? I searched and I didn't find a way to select which interface is the starting point of ...
0
votes
0answers
11 views

setting up switch to fios gateway [on hold]

I have a fios gateway router, I connected a switch to one of the ports, and connected some devices to that switch. Computer,and a PS4. These devices connect to the internet and work fine. However ...
1
vote
1answer
12 views

Routers and output buffers: Why can two devices interfere with each other and cause latency?

I apologize if this question has been asked already because I couldn't find anything related. I'm a beginner in networking and am reading through Computer Networking: A Top-Down Approach, as well as ...
3
votes
2answers
82 views

Wireless Multipoint Bridging / Backhaul Gateway Antenna and AP Selection

My company is replacing an old wireless bridging system with new 802.11ac gear. Layout is a central building with 4 remote buildings within 180 degrees line of sight. Bridging only. I think that I ...
2
votes
1answer
76 views

Is it possible to build VPN remote access environment without VPN server?

Is it possible to build VPN remote access environment without VPN server? In this case, only VPN router on top of LAN is sufficient? If not, why is the server needed in general?
1
vote
0answers
29 views

GRE over IPsec problem

I'm trying to build a GRE Tunnel with IPSec encryption between two routers, but I keep getting error message saying "%CRYPTO-4-RECVD_PKT_NOT_IPSEC: Rec'd packet not an IPSEC packet..." Immediately I ...
0
votes
0answers
12 views

What would be the router's gateway IP address that is connected to a network containing two smaller networks [duplicate]

Assuming that we can use any available public address, we have two separate subnet masks 255.254.0.0 which contains 131,070 usable addresses (IP range 126.240.0.1-126.241.255.254) and 255.255.128.0 ...
0
votes
0answers
12 views

Why too fast ICMP Ping caused package lost [on hold]

I wrote a ICMP ping program and it ran on ServerA, it would send ICMP packages to ServerB from ServerA. When I sent 100 ICMP packages from ServerA to ServerB, but ServerB only got 31 packages. I used ...
0
votes
0answers
10 views

Port forwarding over sftp [on hold]

I am attempting to access a remote machine that is serving sftp over port 22 (direct login with SSH is being blocked). Ultimately, I am trying to connect to port 60080 on that machine, so I'm thinking ...
3
votes
1answer
23 views

Juniper MX: Leaking routes from RIB into VRF

Aim We have a firewall terminating IPSec VPNs to AWS. These are used in the event of failure of a pair of AWS Direct Connects. Currently, the VPNs are routed to AWS over the same Direct Connects ...
0
votes
0answers
8 views

Network discovery survey template? [on hold]

Does anyone know of a good template to fill out when gathering info for a major network overhaul/upgrade? Something that will gather info on the entire network topology on all layers down to end ...
0
votes
0answers
10 views

Can I replace a generic router with NAS router [on hold]

At present for my local network I have a normal router without VPN support. For backup purpose I was planning for Network Attached Storage (NAS) device. What I see is that this NAS has VPN Server ...
0
votes
0answers
20 views

TCP tranferring a 10kb file from host A to host B and its segments [on hold]

I have two questions to ask here because my university sucks and I couldn't find any information in the lectures or the internet: The first one is: The network connection between Host A and Host B ...
0
votes
0answers
21 views

How to have ethernet connection in my room when my living room [on hold]

My router is in my living room, it has a LAN cable connecting from a data point in my living room to the router. Now the problem is, I want to have ethernet connection in my personal room (which has a ...
0
votes
0answers
5 views

1:1 NAT with OPNsense and a GRE tunnel, only some packets are translated [on hold]

My home router is a virtual machine running OPNsense. I have a dedicated server with an IPv4 subnet routed to it, and I have set up a GRE tunnel from my dedicated server to my home router so that I ...
1
vote
2answers
34 views

NAT + load sharing

I would like to do NAT while load sharing is active on R1 and R2 (cisco routers). Do you have any ideas how should I do it effectively? Is there some way to share a common NAT table between the 2 ...
3
votes
0answers
29 views

Redundant physical interfaces for Cisco pseudowire-class

I have a link which is LT2P from a site router R1 (Cisco 867-VAE, IOS 15.3) which has two external interfaces defined (dialer1 and vlan-1000), but only one plugged in (first is ADSL, second is ...
0
votes
0answers
20 views

class B Network subnetting Clarification [duplicate]

can anyone help on network subnetting, A class B network the ip address is 128.211.0.0/16 which means the subnet mask is 255.255.0.0 i want to create 20 subnet network from that the IP address 128....
0
votes
0answers
29 views

Dynamically assign addresses in an IoT IEEE 802.15.4 Network [on hold]

Some context First let explain the context, for a course I had to create some protocol to save power consumption in a IoT IEEE 802.15.4 network (thus how to optimise the routing, fault detection, ... ...
0
votes
0answers
13 views

connections hang forever with VPN [on hold]

I access corporate resources through vpn (OpenVPN). The problem appears only when I am outside of the company (inside I am using wifi), when I am using my phone's network. The symptoms are following: ...
0
votes
0answers
14 views

ppp-ppoe in network [on hold]

Someone in my network did somehting they shouldnt. All I got from them was an IP (which is the same for everyone in the network. Followed by ppp-ppoe-somethingHere. How can i find out which specific ...
0
votes
0answers
6 views

Implement ifb between two internal interfaces [on hold]

I have two local interface : guest-lan and other-lan and wan inteface. My purpuse is using tc with ifb logical interface that have one htb queueing discipline between two lan inteface for example if ...
2
votes
1answer
31 views

Unable to use HTTPS Managment “API” on Cisco ASA 9.12

After upgrading a Cisco ASA to code version 9.12(1)3, I am unable to reach the HTTPS management interface, which we use for many automation tools. Example curl that is functional in prior code (9.8 ...
1
vote
1answer
37 views

Reliable transfer but unreliable auto-negotiation?

I have two servers, the first with a built-in and add-on 10gbit port, and the second with built-in gbit and add-on 10gbit (Syba AQC107), communicating through a feed-through rated for gigabit ...
0
votes
0answers
11 views

Best settings for home network router [on hold]

what should I keep enabled and what should I disable for best performance. Now Im losing packets very often. Internet provider told me there is no problem on their side.. :/
4
votes
1answer
104 views

Ingress filtering on edge routers and performance concerns

The RFC 4778 cover the Operational Security Practices in ISPs Environments back on 2007. Among the best practices, a common one is Ingress Filtering on edge routers. In the above RFC, the author says ...
1
vote
2answers
60 views

Do we send the same packets when we send the same data?

When we send the same data over a network twice, does this means that we are sending the same packets twice? I am trying to understand how my decoder works, so I command using an application on phone,...
0
votes
0answers
18 views

What is exactly builtin VPN client? [on hold]

I'm wondering what differentiates built in VPN or third party VPN client. For example, iPhone has excellent VPN support for client. Is this a functionality provided by OS? Or, is this just like ...
2
votes
2answers
45 views

Hub-Spoke communication with BGP

I'm trying to establish connectivity between Hub and Spoke locations of same enterprise with same AS using BGP. Within DC (hub) iBGP and OSPF is used and eBGP is established between Spokes and MPLS ...
2
votes
2answers
43 views

What are metrics to measure the load in Cisco Routers

I have a setup of Cisco CSR 1000v routers. I established a GRE tunnel between 2 routers, where the tunnel's source is the GigabitEthernet1 interface. I aim to measure the load on that GRE tunnel. The ...
0
votes
0answers
12 views

Windows use LAN but also have access to SMB share on remote Server [on hold]

I have a Virtual Private Server hosting an SMB share that I would like to have permanent access to on my Windows 10 machine (via mounting it as a network drive in Windows Explorer). The server is ...
0
votes
0answers
14 views

How should i modify this network diagram if i am planning to implement a Software Defined Perimeter? [on hold]

Usually there are employees that connect to the remote access server in the DMZ. However, the company is facing DoS attacks from one of those trusted connections. I am planning to opt for an SDP. What ...
1
vote
0answers
21 views

Why Korenix Switches hang up SSH so often? [on hold]

Does anybody know, why Korenix Switches hang up SSH so often? And then, you have to restart the switch each time, that happen. On HP Switch there is no problem with that SSH. If anyone has any ...
0
votes
0answers
14 views

does ipsec phase1 renewal keep connections?

I have an IPSec tunnel UP and I open a TCP connection when the phase1 expire and is renewed, Is the TCP connection supposed to stay alive or drop ? both in the theory and practical (cisco, ...
0
votes
0answers
18 views

pfsense CARP not working with many VLANs and multiple WANs [on hold]

I have a network with 10 VLANs and two WANs. Following https://docs.netgate.com/pfsense/en/latest/book/highavailability/example-redundant-configuration.html I tried to set up CARP. I have made a ...
0
votes
1answer
31 views

1 switch handling several servers or several switches handling a server each?

Which of those two approaches are better for a more stable network? I was thinking 1 switch handling several servers so that other switches are able to handle other devices such as a desktop PC or ...
0
votes
0answers
14 views

Can't Find Latest Firmware for CiscoLinksys SLM2048 Switch [on hold]

How can I get get the latest firmware on a obsolete Cisco switch? Specifically, even though the CiscoLinksys SLM2048 is retired equipment, I have one that still works well, and I'd like to install ...
-1
votes
0answers
16 views

Subnetting of the IP address 160.11.X.X [duplicate]

I have problem in solving subnetting of the following IP address 160.11.X.X. Original subnet mask 255.255.0.0 and number of subnets 6 (six).
2
votes
0answers
27 views

How is a MS (Mobile Station) Identified prior to GPRS attach?

So, originally the MS sends a Packet Channel Request over PRACH and then the BSC responds with a Packet Uplink Assignment over PAGCH. How does this PDTCH allocation get picked up by the correct MS? I ...
3
votes
1answer
22 views

SG3xx Password Reset/Recovery

Trying to reset a password for a number of switches I have. Didn't save the text file I had jotted it down in....of course. Connected via serial, but cannot seem to locate any concise info on ...
-1
votes
0answers
11 views

How to calculate the free bandwidth scope and re-routing the packet in the network MPLS Using OMNET++ with an INET project? [on hold]

I want to know, How to calculate the free bandwidth scope in the MPLS network Using OMNET++ with an INET project? How to re-routing the packet in the MPLS network Using OMNET++ with an INET project?
2
votes
1answer
21 views

Hp procurve 2510 ssh problem

My app connects to switches via ssh to gather info from them. I can connect to any model except this one. I get the authentication error from the switch yet i can connect via putty with the same ...
-1
votes
1answer
59 views

Cable can connect to laptop but not recognised on switch

I have a cat6 network cable running for 40m to an outbuilding which houses my work office. Recently it's been the case that the connection can be made directly on my laptop, but switches (and the ...
-1
votes
0answers
16 views

Get last logged on Windows-User without administrative access [on hold]

I don't know if this question belongs in this section but I could not find a community where it could have fit better. we're currently working on a mixed list of ip addresses and / or hostnames. ...
4
votes
1answer
55 views

Same Vlan Name / ID on different switches network subnet same or different?

I have several switches (some on same floor and another on other floors) all connected to core layer 3 switches through trunk links. One of the vlan id / name is repeated along the switches. May I ...

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