Questions tagged [ssh]
Secure Shell or SSH is a network protocol that allows secure communication. For most it is a preferred alternative to Telnet when available. SSH can use automatically or manually generated keys for authentication.
115
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Wireguard over TCP tunnel at 443 port, blocked ports bypassing, solution for OpenWRT [closed]
Problem
I'm facing a problem - I would like to connect many embedded devices with OpenWRT to my Wireguard server, but all the ports except 80, 443 and some others are blocked. Moreover only TCP is ...
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2
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Cisco ASA5505/6 - public key authentication does not work with OpenSSH client
I have been unsuccessful at getting public key authentication to work per Cisco Systems on any of our ASA5505 or ASA5506 routers. Despite my best research and efforts, I still get challenged for a ...
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Are UDP packets "retransmitted" when dropped by an edge router inside an SSH Tunnel?
A network architect was recently asking about enabling DSCP on tunnels that I create for a VPN-like solution I maintain using ssh to maintain tunnels on linux devices. I thought this was odd because I ...
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Can't find a device on my network [closed]
I have a device on my network that is at a static address (192.168.3.1). This device is connected to a network switch, that is also connected to the rest of my network. My problem is that I need to be ...
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1
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How to generate cisco key-hash string
cisco IOS stores public keys used for authentication as hashes.
cisco obviously does not store the key itself because you can simply copy these key-hash lines between machines and you can authenticate ...
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How do I port forward multiple SSH servers? [closed]
I am very new to networking and I have set up ssh on my raspberry pi. I also have ssh on my windows 10 computer. Here is my problem: I would like to have ssh port forwarding on both my raspberry pi ...
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1
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L3 Switch as network core and ssh connections
We have several L3 switch as core for our sites (central and remotes).
These switchs have multiple IPs for vlan routing.
These IPs are gateway for vlans.
Is it possible to avoid ssh connections for ...
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287
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SSH to ASA on Exit Side Of VPN Tunnel
I have a functioning L2L tunnel between two ASA devices (HQ-FW1 and Branch-FW1 on the diagram).
HQ-PC2 - 192.168.10.21
HQ-FW1 eth0 - 192.168.20.2 (outside)
HQ-FW1 eth1 - 192.168.10.2 (inside)
Branch-...
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130
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SSH Key Generation
I have an issue where I can't SSH into to switch due to a connection refused fatal error after a switch rebooted. One of the rsa key that is in the switch that I think is used in the switch is :
Key ...
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1
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1k
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Computers in an unmanaged switch cannot communicate with one another [closed]
TL;DR:
I have > 2 computers in an un-managed switch which can't communicate with one another i.e. can't ping or ssh among one another.
Long story: As per the diagram my router can reach the ...
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1
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589
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How to increase the screen buffer size on a minicom session screen [closed]
I have been trying to increase the buffer size on the router cli which I am connected through a serial cable via minicom session but I am unable to do it. I am connecting to a linux server through ssh ...
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1
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950
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ssh: Could not resolve hostname (updating hostname for machine on local LAN) [closed]
I have connected a raspberry pi 4 running ubuntu 20.04 to my local LAN over wifi.
From my laptop I can SSH to the raspberry just fine with:
$ ssh ubuntu@192.168.0.47
Welcome to Ubuntu 20.04.1 LTS (GNU/...
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1
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Easiest setup to replace jumpbox forwarding [closed]
In order to connect to some of machines, what I currently do is:
Connect to VPN (using AnyConnect)
SSH to my jumpbox via VPN
For every single machine that I want to access using ssh, I have to map ...
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1
answer
79
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What can I use to display VPN instance instead of stelnet?
How can ı connect VPN service with use ssh in Huawei Atn980c ? Which command? I researched but i didnt different command. I found only this command; stelnet x.x.x.x (VPN instance) (service name) (port ...
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1
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187
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ssh from cisco with fake source-ip
I have two cisco devices directly connected.
router1 = 10.70.223.96/31
router2 = 10.70.223.97/31
on router2 there is an admin ACL permit 10.64.95.0 0.0.0.255 so I can't only SSH router2 from that ...
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2
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Can't log in after admin password change
I reset my admin password with below command:
#Set system login user admin authentication encrypted-password <new password>
But now i can't login to my device, what can be the reason?
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1
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1k
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Lubuntu 18.04 can't SSH to Cisco Router: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1 [closed]
I'm not sure if this problem caused by Lubuntu or Cisco Router side.
Lubuntu = 192.168.1.100
Cisco Router = 192.168.1.1
Ubuntu 18.04.4 LTS
user@linux:~$ lsb_release -a
No LSB modules are available.
...
- 311
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2
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128
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Opening port 22, is there risks? [closed]
I have a question for you, my situation is this:
I have an ip cam that have an HTTP Panel through which I can watch live recording of the camera. I need to watch my io camera also from remote, but i ...
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2
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2k
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I can not connect to switch via SSH after bruteforce
One of the operators has bruteforced HP ProCurve switch via SSH. I have connected to device via console cable and killed all SSH sessions. However, I can not still to connect to device via SSH. How ...
- 155
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2
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1k
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Deny ssh access from CPEs in all routing-instance - Juniper MX960
I try to deny ssh access from routing-instance CPEs in Juniper MX960 device. I want to know if there is a way to deny only ssh access attempt from any routing-instance.
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2
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Is there any method for insert ssh key in putty when i need to connect cisco router?
I need to connect to cisco router and use private key to connect, but i need to use to putty for ssh. Is there any way?
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1
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Problem Forwarding Port 22 for SSH [closed]
I'm trying to forward port 22 so I can SSH into my PC from a different network but it doesn't seem to be working. I can do ssh mihkel@my_public_ip from the network that the PC is on but it doesn't ...
- 101
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427
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Prioritizing SSH, Telnet, TACACS in Cisco IOS
For Prioritizing SSH, Telnet, TACACS locally generated traffic on Cisco ASR running IOS XR, we have:
ssh server dscp 48
tacacs-server ipv4 dscp 48
Need the same for cisco GSR: 12416/PRP running IOS. ...
- 51
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1
answer
824
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What is the point of Junos outbound SSH service?
Junos outbound SSH service makes a SSH connection from network device to SSH server. What is the point of this? Does it allow the server to somehow make the SSH connection back to network device using ...
- 1,325
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127
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Korenix Switch JetNet 4508v2 SSH Problem
Does anybody know, or has anybody worked with Korenix JetNet 4508v2? This Switch has a very important Bug in the Firmware. SSH is working fine, but for a period of time. Then, ssh is not working ...
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2
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2k
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Cisco 3750G - SSH Diffie Hellman Group 1 SHA1 Error
I recently implemented SSH configuration on my 3750G switch stack.
I have
-set the domain name
-generated the rsa key using 2048 bits
-ensured that the vty lines are set to transport input ssh
Now ...
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539
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Juniper EX Switch sending TCP reset on SSH connection randomly
So as stated in Title I'm observing that one of our switch randomly send RESET flag in TCP and ends the ssh connection in the middle and sends and Window size of 0 as well. Randomly it refuses to ...
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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 ...
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1
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SSH failing from Cisco to Juniper - SSH2 CLIENT 0: Channel open failed, reason = 1752134516
Not able to SSH from Cisco IOS 15.2(2)E8 to Juniper 14.1X53-D48.1
HOST#show debugging
SSH:
SSH Client debugging is on
HOST#ssh 1.1.1.1
*Feb 11 15:55:47.448: SSH CLIENT0: protocol version id is - ...
user38976
2
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1
answer
957
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Restrict VTY SSH access to only MGMT VLAN and loopback
For the sake of the fact that i'm not allowed to share actual configuration, every posted config below is made up or altered.
We have more than 250 locations spread over our country. All locations ...
user36472
3
votes
1
answer
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In port forwarding, is the ultimate destination decided solely by the intermediary entity?
In port forwarding, is the ultimate destination to connect to solely decided by the intermediary entity which provides port forwarding, not by an application client?
Although the page mentions dynamic ...
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Does “tunnel” here mean the same as tunnelling as in SSH?
From book Data and Computer Communication
Tunnel Unlike the proxy and the gateway, the tunnel performs no operations on
HTTP requests and responses. Instead, a tunnel is simply a relay point ...
- 1,505
2
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1
answer
183
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cisco catalyst creating user fails
I took over a couple of Cisco 2960x switches. They are configured with a telnet login. Now that telnet isn't that great (and my colleagues are afraid of CLI but might have to configure things too) I ...
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1
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Login local , login synchronous
I dont understand what those two comands mean when im enabling ssh
on Vty-line.
Can someone please explaim me please whatthose comand do and why i need to use them?
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2
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IP Domain-name on aggregation layer switch
Hi I was trying to generate ssh key for a switch
I read that , ssh key is generated as a combination of hostname and domain-name
I created a domain name like test
But doubt is , why isn't the ...
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1
answer
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Random intercontinental TCP streams are slow
I have a home server in New Zealand and a remote server in Amsterdam of the following configuration:
I have a simple test script:
#!/bin/bash
for i in `seq 1 20`;
do
scp root@remoteserver:~/...
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0
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VPN Configuration [closed]
Im trying to reach a network at a remote site. I need to have my machine configured to have access to equipment on this network(not computers). I have a debian machine located on this network but the ...
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1
answer
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CISCO IOS's feature Secure Shell Version 2 Enhancements for RSA Keys
I have a switch C3750V2-48PS with IOS ver. 12.2(55)SE5. I wanted to copy to it public key for the ssh client but I do not have following command available
Switch#configure terminal
Switch(config)#ip ...
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1
answer
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Connecting centos server through Putty [closed]
I have been facing following problem for several days, but i can't find an exact solution.
So I have Centos server on Vmware Workstation and i want make a ssh connection through Putty. But i receive ...
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"ssh: connect to host myserver port 22: Invalid argument" (intermittent, ipv6, link-local address, dhcp hostname) [closed]
Since this question is off-topic I moved it to Super User. But I was unable to delete it.
Here is the new location.
Here is the original question:
I'm trying to connect to a headless server via my ...
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3
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Bypassing a Cisco Terminal Server Menu
The guys at a config center connect to devices by: placing them on a management rack, and plugging them into a management switch by means of some hwic/RJ45 reverse telnet connection. When you remote ...
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3
answers
1k
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Cisco ISR4450 Router SSH access denied
I configured an ssh connection on an ISR 4451 router, which always worked perfectly.
For several weeks, every time I want to connect with Putty via SSH, I get an "access denied". I also cant connect ...
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1
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291
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Remote access ssh on Ubuntu [closed]
I want to enable remote access to my machine. I have thus far enabled port forwarding on router. Lets say the static local ip address of the machine is 192.xxx.x.x. We will cal the ip address that is ...
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0
answers
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SSH into device attached to another router [closed]
I saw this questionwhich looks kind of related, but I'm not sure as the answers are too confusing.
Basically, I want to SSH into my Raspberry Pi from my laptop. Eventually I want to have the Pi ...
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2
answers
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How do I automate ssh sessions with a Router Ericsson IPOS?
I am trying to automate the healthcheck process of a router by running a centralised script from a linux server. I am so far able to access the router server without password prompt using ssh and rsa ...
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1
answer
1k
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Cannot ping or SSH into new Catalyst 2960-CX switch from the server VLAN (1)
I recently setup a Cisco Catalyst 2960-CX switch at work (I'm a SysAdmin at a SMB). Our workstations use VLAN 3, but our servers use VLAN 1. The management IP of the new switch (in VLAN 3) is 192.168....
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How to authenticate logins to Ericsson(IPSO) routers without password from shell server
I am very new at networks. I am attempting to automate the health check process of a system network from the main server being a shell OS.
I have been successful for some network nodes which are ...
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1
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1
answer
318
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Pinging/ssh-ing into just trunk interface. How is it done? [closed]
I'm a junior network technician and I was tasked at work to do a switch upgrade. The most important part of this task is to set up SSH so we can at least get into the switch remotely configure once ...
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1
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163
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SSH and port forwardings in both directions [closed]
I can't undersatand this :
All communication happens using SSH with port forwardings in both directions
Any help?
Thanks.
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1
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Cisco: Return key needed after remote ssh console access using rotaries
I´m configuring a remote ssh access with TACACS to a console in a Cisco 2911, on a rotary port. When the access is granted after a successful ssh authentication, an Return key is needed to access the ...
