Questions tagged [tunnel]
For questions about network tunnels.
152
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Options for building a layer 2 tunnel or VPN from a windows machine to a VMware network? [closed]
What options are there for building a layer 2 tunnel or VPN from a windows machine to a VMware network ("Virtual Machine port group for a Standard Switch")? I want to have a network ...
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IPSec over L2GRE scenario
I wanted to know if this is a valid scenario and if it is possible to implement.
There is a remote site A. and a Data center site B. Both A and B have a edge router which runs an IPSec tunnel. An ...
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Which technologies are most relevant for mobile broadband ISP bonding? [closed]
If I have edge router and core router (kind of Hub) and few ISP lines between them what are the most relevant technologies to be used for mobile broadband bonding?
Expected result is:
if one of ISP ...
- 101
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48
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DH groups support for isakmp policy
When configuring a site-to-site VPN tunnel between the ASA and Cisco router, I have queries around the ISAKMP policy. As per Cisco documentation for ASA, the crypto isakmp policy groups available are ...
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2
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104
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IPsec PFS Confusion
I'm reading conflicting things about how PFS works in IPsec. Some sources say it's simply a renegotiation of the Phase 1 IKE/ISAKMP SA that ignores the original IKE/ISAKMP SA lifetime value and that ...
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What is Pipe model in MPLS, and for what scenarios and situations is it used, in most simpliest terms?
I know there is Short-Pipe model and Uniform Pipe model. What is the difference between tunneled traffic PHB and tunnel PHB in Short-Pipe model?
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124
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Can you sniff network traffic through a VPN tunnel? [closed]
Background:
I am doing research for building an automated penetration testing application. All tests will be run from some server with a public IP ("testing server"). The objective is to ...
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424
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GRE tunnel bridging and MTU mismatch
Background
My workplace has 2 office areas which is only 200 meters away from each other. They have their own local networks, their own Internet connections, with routers configured to fallback to the ...
- 413
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2
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314
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Why does recursive routing happen?
According to:
https://study-ccnp.com/gre-tunnels-recursive-routing-problems/
Recursive routing occurs when the router learns the destination IP
address for the tunnel interface through the tunnel ...
- 1,591
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2
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335
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Override tunnel-all VPN connection to print locally
We have a remote office with several users. The users connect to the cable modem there and individually VPN to our NSA2650 via Sonicwall Global VPN client. This client is set to tunnel-all mode ...
- 111
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3
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116
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dynamic mac address added all hosts through the Do1Q tunnel
we have a nexus switch, we configure two customer ports in different switches with (mode Dot1Q tunnel)
as all traffic must have two VLAN tags, an inner tag, and an outer tag,
in our network, we ...
- 331
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Cisco L2TP VPNd with GRE over IPsec tunnel [closed]
I have a GRE over IPsec tunnel between router 1 and router 2.
The routing between the 2 routers is EIGRP.
I have access to the CLI and I can ping all subnets.
I try to create VPNd L2TP
I create it, ...
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2
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535
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In tunneling, how destination routers identify if a packet is encapsulated?
In tunneling, a packet gets encapsulated in the payload section of another packet. If the router at one end encapsulates the packet, then how the router at another end identifies whether the packet is ...
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In PPTP, do encapsulated packets get further encapsulated in Ethernet frames?
I know that for PPP to travel in datalink layer 2 (ethernet) , the ppp frames need to get encapsulated in a ethernet frame , thus PPPoE. Is the same case for PPTP too?
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609
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Site-to-Site VPN with Sophos XG using tunnel interface
So I have configured a Sophos XG site-to-site vpn according to this document:
https://docs.sophos.com/nsg/sophos-firewall/18.0/Help/en-us/webhelp/onlinehelp/nsg/sfos/learningContent/...
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1
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867
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Cisco IOS -> ASA VTI tunnel not routing traffic
I have a VTI tunnel configured between two devices (ASR and ASAv). The tunnel comes up fine and is stable, however traffic appears to be unidirectional, from the ASR -> ASAv but not in the reverse ...
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Transporting TRILL over Juniper QFX5100
I've got 2 Brocade VDX switches setup using VCS and want to add another 2 switches to this group, but when connected to each other over a Juniper QFX5100, they won't see each other.
The Brocade ...
- 121
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2
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What are the benefits of using a transport label in L3VPN?
If not utilizing any form of TE (Traffic Engineering), are there any benefits of using a transport label in L3VPN - instead of just using a simple IPinIP tunnel?
e.g. if traffic is egressing PE1 with ...
- 1,591
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63
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Why does GRE tunnel has lesser TxBS/RxBS than its physical interface?
Given for instance,
interface Tunnel200
tunnel destination 110.153.1.1
There's a static route for 110.153.1.1, pointing to physical interface Gi0/0.
Gi0/0 is only used for tunnel200.
Under show ...
- 237
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1k
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MTU/MSS Oddness?
We have an IKEv2 IPSec tunnel between two Sophos XG Firewall appliances in a corporate system for a remote site.
We don't have any specialized MSS or MTU settings other than what the IPSec tunnel ...
- 181
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1
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43
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What is a child tunnel? [closed]
I only heard this term today, but it was explained to me as a point-to-point VPN (so, two routers with a VPN tunnel established between them) and a firewall configured to only allow certain hosts to ...
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Segment Routing Encapsulation on Client Interface? [closed]
I wanted to test SRv6. Always between two clients (client 1 <-> client 2).
If I do the encapsulation on the client everything works smooth as expected.
Client 1 (encap SRv6 Tunnel) <- 2001::/...
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363
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routing MTU size and encapsulation?
I did some research for my question beforehand such as this one:Cisco routers THROUGHPUT - MTU and packet size
however, it seemed not precise to explain the doubts in my head.
My primary goal is to ...
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3
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261
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Combining NAT an tunneling
I was reading a text and a doubt came to mind. Suppose there is an interface in a router that implements NAT. That same interface is the extreme of a tunnel. If I was to send a message through said ...
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2
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50
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How to build secure access for cloud machine in small startup [closed]
We have 7 member team (3 dev + 2 qa + 2 Sales).
We host our PROD + QA + DEMO server in GCP.
As of now, all our PROD/QA/DEMO/DEV/QA-DB/DEV-DB machine are having public IP, so that we can ssh into them.
...
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1
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What's the difference between L2TP and L2TPv3? [closed]
Is L2TPv3 an improvement of L2TP or a completely different technology? Other than "it scales better" and "the non-proprietary MPLS" I can't find much information about it that's ...
- 95
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22
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Is it possible to gain VPN access through RDP [closed]
Scenario:
I have been tasked to resolve an issue for a client's EmailReceiver program. I have the source code on my PC. I have been given RDP Access to a entry point machine, through which I can ...
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Encapsulation: can a higher protocol encapsulate a lower protocol?
I've heard someone say that a protocol higher up the osi model can encapsulate a lower protocol.
As far as I know, personally, a protocol can only encapsulate a same-level protocol or one at a ...
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983
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Q-IN-Q Tunnel between cisco and mikrotik not work
i have try to make A Q-IN-Q tennel between two router (cisco and Microik) through cisco switch
in mikrotik
VLAN ID = 10 IN interface ether1
VLAN ID = 20 in interaface Vlan10
ip address in interface ...
- 331
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73
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What does a VPN Tunnel offers other than encryption?
A VPN tunnel is end to end encrypted.
But does it gurantee to provide features other than encryption, such as low latency, low jitter etc?
2
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1
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178
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Confusion about IANA "Protocol Numbers" registery
In the IANA registery for "Protocol Numbers", there listed 2 IP protocol versions: IPv4 at #4 and IPv6 at #41. Their "protocol" column says IPv[46] Encapsulation, and "...
- 173
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192
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PPTP encapsulation process
i am learning networking and vpn technologies now and i have some problems with understanding the whole PPTP encapsulation process. So i will write steps of PPTP encapsulation process (as i understand ...
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75
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GRE Encapsulation
i am learning networks and tunneling and i have problems with understanding some things about GRE.
The structure of tunneling below:
[Transport Protocol][ensapsulationg protocol(GRE)][encapsulateed ...
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132
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Finding MSS for a remote connection that uses tunnelling
I'm working on a codebase where we're trying to test network health by verifying if we can ping the remote site having payload = MSS without any packet fragmentation (using -df flag).
Typically, for ...
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IP-Sec VPN Tunnel Established Between 2 Remote Machines. Why Can't Machines In Their Subnets Connect Across? [closed]
Have 2 Remote Ubuntu Machines in different subnets.
one: 192.168.1.0/24
Two: 192.168.2.0/24
Established VPN tunnel between 2 machines, 1 in each subnet.
Their IPs:
Public IPs
1.1.1.1
2.2.2.2
...
user62543
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2k
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Cisco qos, service-policy on output interface on 1100 ISR seems ignored
I am trying to configure QoS for a specialty purpose application, and it is the first time I have done QoS. This is on an 1100 ISR with IOS XE 16.09.03.
The device is a set of 4 that establish a mesh ...
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56
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VPN to a current subnet ID
I am sure this is a fairly basic question, but the standard google searches have not told me what I am looking for.
I have a restaurant that uses an ipad point of sale on a dedicated subnet id: 192....
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1
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288
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Tacacs+ over VPN is not working
R3 is a Tacacs+ client and Server0 is configured as AAA server with Tacacs+ but R3 is not able to authenticate.
R3 Configuration:
!
version 15.4
no service timestamps log datetime msec
no service ...
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605
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What is the difference between VPN and Domain fronting?
What is Domain fronting? and how it is different from a VPN?
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828
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How can I accomplish VPN across Dual Wan connections?
How can I accomplish VPN across Dual Wan connections in a optimal way?
Idea is to make:
Site to site VPN.
Make single connection inside the VPN to use full bandwidth of both wan connections using (...
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How do you define interesting traffic using an IPSec Profile on a Cisco router?
I apologize if this is a duplicate, but I'm having difficulty figuring out how to define interesting traffic on a Cisco router using an IPSec Profile referenced by a tunnel interface.
The old-school ...
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Assign a new public and static IP to a router behind my main router [closed]
What can you suggest to bring a second public and static IPv4 so I can configure my WAN-A interfase with my primary and an additional secondary IP settings so I can route all the traffic from the ...
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1
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2k
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Dropping packets between router and firewall without firewall rule
I have a user that is trying to access his company network resources on his home network. He is able to access SMB shares and other resources, but he is unable to access their AS400 on any computer in ...
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VPNs are working in which layer of the OSI model? [closed]
As the following picture shows, it is possible to categorize VPNs in two general categories:
Client-based VPNs
Network-based VPNs
When it is required to choose a VPN for implementation in a network, ...
- 311
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456
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Remote access to the network without port forwarding (blocked by ISP) - VPN [closed]
I need to setup a following configuration:
A router Mikrotik is connected to the internal Network1. The router has a USB 3G modem that is connected to it and enables internet access from the ...
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qos inside vpn, possible or not ? I read yes and no
I am wondering if possible to do QOS (or similar action) inside vpn tunnel to a cloud server. the goal is to reserved bandwith for voip traffic.
I read that you can with GRE and other people said, ...
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654
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Why do all the intermediary routers need to run iBGP without tunneling?
I'm trying to understand the configuration behind iBGP - I understand you can run full mesh to prevent loops, run confederation or route reflectors, if you don't want full mesh, else run tunneling ...
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1k
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Traffic not send in IPsec with a Cisco ASA
I try to set up a site to site IPsec between an Ericsson router and a Cisco ASA, as shown below:
My tunnel is UP and R1 seems to be working fine. However, my ASA does not forward traffic between ...
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937
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What are the differences between tunneling and regular encapsulation?
What are the difference between tunneling (https://en.wikipedia.org/wiki/Tunneling_protocol) and regular encapsulation (e.g. TCP/UDP over IP, HTTP/SSH over TCP)?
Is TCP/UDP over IP considered ...
- 1,535
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4k
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Difference between WAN and VPN(tunnels)
I got my CCENT and working on ICND2 to get my CCNA. I am stuck on this topic and am unable to grasp the context. WAN and VPN and how they differentiate. My understanding is we need WAN for "Physical" ...
