0
votes
3answers
30 views

outgoing ssh fails from only one machine on lan to outside network

I have multiple servers in my LAN (which I'll refer to as Box1), and they are all able to make outgoing SSH connections, except one that stopped recently, which I'll refer to as Box2 (actually, I'm ...
0
votes
1answer
21 views

Reach ssh server behind a router on embedded system using established socket connection

I have developed an embedded application running linux to do remote I/O control. The application open a socket connection to my server to communicate, periodically, the state of the I/O and getting ...
0
votes
4answers
78 views

Remote into Linux workstation behind a firewall using NoMachine or other remote desktop service

My question is very similar to this question: Remote into Linux workstation behind a firewall My work has firewall and ssh server. The ssh server is listening to the default port 22. Normally I ...
0
votes
1answer
73 views

How do I fix these iptables?

I am trying to setup my networks firewall, and am having trouble because i keep getting kicked out of SSH because of mistakes. Here's what I currently have: # Custom Rules iptables -F iptables -X ...
0
votes
1answer
43 views

SSH into host on the same network behind a firewall that blocks SSH

I'm trying to SSH into my Raspberry Pi, which is on the same wireless network as my SSH client. My firewall blocks SSH connections. I changed the sshd listening port in my Raspberry Pi to 80 like ...
0
votes
1answer
86 views

mac osx littlesnitch blocking outgoing connections from ssh remote login

I have setup remote ssh access on the rush in my development computer (OSX 10.6.8) before leaving my home for holiday yesterday. It is correctly setup, and I can access it via SSH, logging is as root ...
0
votes
2answers
46 views

How to allow ssh into a device on remote 4g modem when provider is blocking inbound connections?

I am planning on deploying a network of remote devices, each connected to the internet through a 4G modem. The devices need both outbound connectivity to our cloud-based servers, and occasional ...
0
votes
0answers
20 views

NAT to remote computer

PC A (Windows 7) can create TCP connections to PC B (Windows XP) but B can't make outbound connections to anywhere due to firewall rules. If I need B to connect to a host in the same network as A, I ...
0
votes
2answers
107 views

Is Iptables blocking outgoing ssh connections?

I have been trying to do pulls from github and it keeps hanging. My iptables rules have no rules which block outgoing traffic but I cannot connect to github using either ssh or http. I can't even ...
2
votes
1answer
77 views

SSH: can connect to computers on local network but cant connect remotely

I have 3 computers running ssh server on them: PC1 is running Cygwin on Windows PC2 is also running Cygwin on Windows PC3 is running Linux and they are on the same network connected to same ...
0
votes
1answer
147 views

How do I block every connection except vpn and ssh without endangering the state of my vps?

I have some vps space but I get alot of scans based on what I see in iftop. I tried some iptables stuff but it gets tiring and useless to put all the ips that I see in the logs. I am wondering about ...
0
votes
1answer
128 views

UFW default rules… where are they?

In the tutorial on UFW here https://help.ubuntu.com/community/UFW it says that UFW uses the default rules if enabled and not configured. I checked the folder: /etc/ufw/ and the files I found ...
2
votes
1answer
77 views

How to use google search via SSH tunnel?

I live behind the Great Firewall of China (not very proud of it) and I'm slightly technical. So I use SSH tunnel to route all connection to my VPS. (i.e. ssh -D port and then set localhost:port as a ...
1
vote
0answers
123 views

SMB over SSH port forward

I know that since SMB is not secure, opening port 445 on firewall makes your computer vulnerable. To secure my connection, I want to run a SMB mobile app via SSH. Would I still need to open port 445 ...
0
votes
0answers
275 views

nc -v -w 1 111.111.111.111 -z 22 returns port 22 (tcp) timed out: Operation now in progress

Encountering a strange problem on my Ubuntu machine, trying connecting to 111.111.111.111 (example ip) via SSH fails. When trying to connect from other win machine its works. I don't have a ...
0
votes
0answers
87 views

Residential ISP possibly blocking SSH and other odd high ports - how to verify?

I have recently had a problem in a scenario where I am having to run SSH and some other high number port services behind a residential connection. I am suspecting that the ISP is performing some level ...
0
votes
1answer
114 views

How to tunnel a port from a server behind a firewall to a remote server that allows connections via ssh?

I have a scenario where I need to open up a port for a server behind an ISP that appears to be blocking traffic. In this case I have a dedicated server remotely that I can ssh into and use whatever ...
2
votes
1answer
118 views

SSH tunnel and firewalls

Can a firewall still block things off a tunnel going trough it ? I am testing my proxy with Dante in China and works flawlessly but I have the same config on a proxy in Ireland that goes trough a ...
1
vote
2answers
292 views

firewall has blocked ssh

I want to connect to remote amazon aws service(EC2 instance) , and I would like to be able to ssh to it from my laptop while using the campus provided network (which has cyberoam firewall). However, ...
-1
votes
2answers
4k views

ssh: connect to host 192.168.1.38 port 22: Connection refused [closed]

I have installed openssh server on my system using the following command: apt-get install openssh-server But when I tried to remotely access this server from another system (client) it shows me ...
0
votes
0answers
17 views

Work with a SSH connect rate limitation in the firewall

My university uses a firewall which limits the SSH connect rate. Since I often do one-off scp or rsync commands, I quickly run into that rate limitation. Is there some way to use a persistent SSH ...
0
votes
0answers
132 views

Configuring port forwarding for SSH - no response outside LAN

I recently moved, and at the same time purchased a new router (Linksys E1200). Prior to the move, I had my old router set up to forward a port for SSH to servers on my LAN, and I was using DynDNS to ...
1
vote
1answer
125 views

ssh to Amazon EC2 Ubuntu server behind firewall

I ssh to an Amazon EC2 server and have just enabled the ufw firewall. This terminated my connection and now I can't ssh back in. I assume the firewall is preventing access. I tried rebooting but no ...
2
votes
1answer
96 views

SSH Port closed although forwarded correctly

I'm having an issue with opening my SSH port. Here are the symptoms. Within the local network I can ssh to the machine, including both locally (ssh localhost) and from alternate computers. I have ...
1
vote
3answers
472 views

linux routing outbound port 80 traffic via ssh tunnel, iptables, or a simple route

I have two hosts, A and B. Host A hosts services on port 8080 and has outbound internet firewall rules allowing port 80 and 443 access to Host C. Host B is on the same subnet as Host A. Host B is ...
0
votes
1answer
567 views

ssh using putty to server outside vpn

I don't know too much about networking and I'm hoping someone can point me in the right direction. I'm not sure how to go about solving my problem... When I'm connected to my company LAN, I'm able ...
0
votes
2answers
92 views

How can I make ssh connections under restrictive conditions?

I am demoing a product that will soon be sold, but during demos I have found that peoples internet is often more restrictive than I ever thought. In one particular area the internet provider does not ...
0
votes
1answer
32 views

internet access on natted server

I have two linux servers say X and Y. There is a VPN connectivity between the two, such that X can connect Y through some ports(e.g. 22,5901 etc) but Y can not connect X. internet is available on X. ...
0
votes
1answer
1k views

Connecting to SSH from behind an HTTP proxy

I'm behind a corporate network with an HTTP proxy. I also have an SSH server to reach on port 22. I don't have any kind of control over that server: I'm not root and even if I were I'm not allowed to ...
4
votes
2answers
2k views

Cannot connect to my mac via SSH

I want to open a connection to my mac (10.8) via SSH. An SSH-server is installed by default on OSX. Remote login is enabled, so the service is running and I can connect to to localhost via ssh. ...
0
votes
1answer
368 views

SSH, SVN and firewalls

I have a typical set up where by my SVN server is on a machine behind the firewall and I have a gateway machine which I can SSH into. When outside the network if I want to checkout the repository I ...
2
votes
1answer
1k views

Work firewall blocking Gmail IMAP port

My work has a very over protective firewall. We use Google Apps for our email and so can access the web interface just fine. I use my laptop at work however (MacBook connected via WiFi through my ...
6
votes
2answers
2k views

SSH Tunnel doesn't work in China

Last year I was working in China for a few months. I never bothered setting up a real VPN, but just created a SSH tunnel, and changed my browsers proxy settings to connect through it. Everything ...
-2
votes
1answer
251 views

port 21 and 22 are open on a fresh install of mountain lion

I have Mountain Lion (fresh install as of today), I have also reset the router and it has no port forwarding or anything. There are no other devices connect to the router but just the mac. I did a ...
0
votes
2answers
2k views

Virtualbox SSH from Windows 7 (host) to CentOS (guest)

My network adapter is set to "Bridged Adapter". My CentOS (guest) IP is 192.168.0.4 and I am able to view Apache web server (port 80) from Windows 7 (host) but I am unable to SSH (port 22). I get ...
3
votes
4answers
3k views

how to ssh two computers behind NAT and Firewall, without third computer

I am trying to ssh into my Linux box at home. My home is a dorm-style environment - NAT and Firewall with personal laptop running Arch Linux. My work is corporate style Windows 7 - NAT and proxy ...
0
votes
1answer
1k views

How to use SSL tunnelling to give full internet access to some applications while you are on a restrictive corporate network?

How to use SSL tunnelling to give full internet access to some applications while you are on a restrictive corporate network? Use cases: you want to be able to access some restricted destinations ...
0
votes
0answers
176 views

Temporarily only allow network-access via (sshd-socks) Proxy

I am alot on business trips using the hotel's hotspot. I connect to my solaris-server using putty/ssh and establish a socks-proxy. Using Chrome and Proxy Switchy, I surf via the sshd's socks-proxy. ...
3
votes
2answers
691 views

ISP blocks the use of ssh?

I fail to use ssh connecting to my remote machine, the detail situation is as following: The remote machine is behind a firewall, but can be connected using ssh with port 45992. I used to connect to ...
2
votes
3answers
1k views

How to ssh to a linux server behind corporate firewall?

My company has a linux server (CentOS 6 VM) behind a corporate firewall, I have full root control of the VM, but I have no control over the firewall. There's an ssh server running on it, and I can ssh ...
1
vote
2answers
3k views

SSH connection between two behind-nat computers through third public-ip computer

I have a computer at home (home-server) that runs irssi, rtorrent etc. My ISP is blocking every traffic from outside (dumb, I know, but it's the only ISP I can have). I want to be able to log in into ...
15
votes
5answers
9k views

SSH access to office host behind NAT router

I would like to access the ssh port of my office linux host from home. Unfortunately the host is located behind a NAT router. So, the IP address is not publicly available. There is however access to ...
0
votes
1answer
516 views

How to purge connections left open by SSH ProxyCommand?

I have a webserver WWW1 and a front-facing proxy PRX. I use SSH ProxyCommand to connect to WWW1's internal IP (private IP) via PRX (private+public IP). For some connections (not all) I see a network ...
5
votes
2answers
3k views

VPN/Tunneling (SSH or otherwise) on Windows via HTTP proxy

Situation. ... +-- Computers (to the internet) | | - [ router / firewall ] -- [ switch ] +- [ switch ] -+-- ...
3
votes
2answers
2k views

Local port forwarding on a mac

I need to have the mac take traffic coming into it on one port send the traffic to a different but still local port. I.e. Traffic comes in on port 1234 and transfers to port 5900 (vnc) This is ...
1
vote
1answer
306 views

Broken Firestarter Firewall Settings

I'm trying to set up SSH so I went into my firewall (Firestarter) and started going through the settings. Afterwards, nothing worked and everything was getting blocked by the firewall. The only way I ...
1
vote
2answers
1k views

SSH tunneling for bypassing firewall (http and socks)

I'm having problems setting up the following: I am on Linux on machine LOCAL (my notebook). I ssh into a company machine REMOTE which is behind a firewall and ONLY allows incoming ssh connections ...
0
votes
3answers
2k views

Web browsing over SSH

I have something of a difficult situation : our company has a webserver in a remote data center that's, at the moment, only accessible by SSH and the firewall is not easily modifiable because the ...
-2
votes
3answers
243 views

How to query whether SSH is available under Debian?

I'm trying to implement ssh server under a custom Debian-based installation, which has no GUI, and yet no ssh access. How can I know whether SSH is installed, and how can I know whether the firewall ...
2
votes
3answers
4k views

How to SSH an outside server from a computer which is behind a proxy firewall?

I access the Internet through an HTTP proxy firewall at college. And I need to login to a computer, via SSH, which is outside our network. I tried it as Linux command and on Windows using PuTTY. I ...