So here's the setup:
Ubuntu 10.04 host inbound port 22 open
FreeBSD 8.0 host no inbound ports open
Both hosts are running sshd currently. What would you do for the Ubuntu host to be able to ssh to the FreeBSD host? A tunnel?
I am working on a cluster for a molecular dynamics class and I have to edit my FORTRAN code (only the newest and best for me!). In order to get through to the cluster I have to ssh in. The network on which the cluster resides is behind a firewall, so I have to ssh through the firewall into the network first.
this is fine, I can login and move files and folders as needed, including sftp-ing into host 1, then into the cluster so I can transfer files from cluster to host and then host to me. This gets rather tiresome, so it would be nice to edit the files in place.
The problem is that when I access my code with emacs it launches the emacs client on Host 1, with no mouse support. I know the purists will howl about how I should be using keyboard shortcuts, but I am a chemist and not a programmer, so the mouse is very nice for me. Is there any way I can perhaps mount the cluster using sshfs so that when I open my code it launches a local instance of emacs? Sorry if this is the wrong forum, but I thought it was network related.
I got a bunch of machines (~10) that I share with my co-workers. I have appropriate .ssh file(s) set up so I don't get prompt for password when I try to ssh.Currently I ssh into these hosts and then do a top to check the load before I start using the machine. Because I don't want to be on a busy host.Can someone show me how to write a script that find a least-busy host given a list of hosts to check? (hardcoded is fine)
View 1 Replies View RelatedThe internal network is behind nat done by the PC Router.The TP Link is recieving wireless signal from outdoors and it has switching and basic routing capabilities. I'm using the PC router for better routing options.PC Router (or R for short) is a triple-booting machine - Linux, FreeBSD and Windows. It has two lan cards - external (ext_if) - 100Mbps Realtek 8139 and internal (int_if) - 1Gbps integrated Realtek 8169.The problem is that all traffic from R to the network is slow - about 5-20K, while the traffic in the oppoiste direction is all right - about 10MB that is fine for 100Mbps cables, NICs and switches. The problem persist no matter the OS the pc R is running.I've tried some debugging on the situation as follows:
- put another PC at the place of R - everything is fine. That exclude the possibility of damaged cables, RJ-45s, switches and etc.
- connected both of the NICs to the Internet while the internal network is being disconnected and they both work fine (no delays)
- traffic shaping is not running
- there is nothing in firewalls except NATing the internal network (and it is working fine). Actually these firewall rules have been operational for more than months and everything was fine untill a week or two ago.
- changed the internal NIC with another
- connected the internal network directly to the TP and all of the PCs are getting good network performance. Then connected the R machine to the TP as well and there was good performance between the internal network PCs and R.
- R has good performance to the TP. In fact everything has good performance directly to the TP (when not connecting trough R).
- the problem persist only between R and machines from the internal network.
Many of mails sent from my mail server that are in Queue;The main reason is deffered by domains like yahoo,aol,etc.but there is one more error that i keep getting and that is Host Unknown,Below is an example from mail log,The catch is,test mail sent on the same email id sent from my personal mail from the same server i.e. url was deliveredHowever,another mail containing client information sent from customercare@mycompanysdomain ended up in queue.
There are more examples of the same,around 20 domain have the same problem.
Sep 7 14:33:46 server2 sendmail[24591]: n8793jiC024589: to=<abc@xyz.fi>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=163672, relay=xyz.fi., dsn=5.1.2, stat=Host unknown (Name server: xyz.fi.: host not found)
Sep 7 22:09:42 server2 sendmail[6407]: n87Gdffa006403: to=<abc@def-fgh.com>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=152474, relay=def-fgh.com., dsn=5.1.2, stat=Host unknown (Name server: def-fgh.com.: host not found)
Host - Fedora 12 64bit
KVM
VM - Windows Server 2008 64 bit
bridge-utils
VM can ping host and Internet but host can't ping VM.
I set VM static IP 192.168.0.205.
It turns out dynamic IP - 192.168.0.55
On host:
I have two servers, one has an empty / and the other has a subdirectory with a large number (4 gig) with many, many files. I need a way to transfer the files en masse from the server with the large number of files to the one that is essentially blank.I don't have space on the used host to simply gzip all the files. I've googled this and see that there may be some combination of tar and/or gzip that will let me do this with some sort of redirection.
I really need and example line of how this can be accomplished. If my explanation seems rather sparse, I can supply more details.
Bit of an odd one, this. I've migrated a website from my old server to a new machine. Both servers run Ubuntu + Apache2. Both only serve a single site, apart from the default site.I've flipped the domain name to the new IP address.The trouble is that after moving the virtual host config over into sites-available, with the necessary link in sites-enabled, Apache attempts to serve from the default web root (/var/www) rather than the actual site content (in /var/www/technology). So for example, an attempt to browse.
View 1 Replies View RelatedI'm trying to get Synergy up and running between my Windows 7 (server) host and my Arch Linux (client) host. In rare exception, synergy works perfect on my windows host, however every time I try and run Synergy on my linux machine I get the following error in messages.log:
[code]...
I'm running Arch with a barebones Xorg install and SLiM with LXDE. I'm not sure what in the world is causing the problem and haven't been able to find anything of substance in a search.
I'm trying to ssh from my laptop to my desktop (both fedora 14) over a local network. I can ping my desktop and get responses, but if I ssh to it, I receive
ssh: connect to host 192.168.100.xxx port 22: No route to host
I can ssh from the desktop to itself.
HOW TO GET THE IP ADDRESS OF HOST IN LINUX WITH USING OF HOST AND NSLOOKUP COMMAND and after getting the ip address how to assign it in the variable
View 4 Replies View RelatedI am a bit of a n00b when it come to linux but I am setting up a test environment were I have a appliance monitoring network traffic. Part of my test requires me to copy a file via RCP from one host to another host. I have two ubuntu boxes. I have allowed the subnet in the etchost.allow for ALL. I have installed rsh-server
When I try to copy the file it looks like it tried to use SCP instad of RCP because it connects to 22 instead of 544. Also note that traffic must be unecrypted thus me trying to use Is there anyway to make ubuntu go old school to allow me to use rcp instead?
Code:
testuser1@ubuntu:~$ rcp /home/testuser1/test.txt testuser1@10.46.41.38:/home/testuser1
ssh: connect to host 10.46.41.38 port 22: Connection refused
lost connection
testuser1@ubuntu:~$ rcp
usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]
[Code]....
I have installed CentOS 5.4 machine named test.example.com (192.168.1.1)File /etc/hosts contains:127.0.0.1 test.example.com test localhost.localdomain localhostI have read that the loopback addres should not be assigned to host name,only to localhost and the host name should be assigned to 192.168.1.1, like this:127.0.0.1 localhost.localdomain localhost192.168.1.1 test.example.com testIs there any reason why it should be one or another way?
View 6 Replies View RelatedWhat do host.allow and host.deny do exactly? what are they??
View 3 Replies View RelatedI'm having an issue where some of my machines hostnames are no longer able to be resolved after setting up a mythbuntu backend to allow netboot. Also it seems that which machines hostnames get resolved is not consistent. (ie sometimes one gets resolved and sometimes it doesn't) I suspect that it has something to do with the changes I made to "/etc/ltsp/dhcpd.conf" to get the netboot running.
I have a Verizon DSL modem/router as 192.168.1.1. Up until playing with the "/etc/ltsp/dhcpd.conf" I saw hostnames of all of my machines show up in its network map. Now, some of my machines still get network access but their hostnames are no longer resolved. What did I do wrong? Here is my dhcpd.conf file:
Code:
# Default LTSP dhcpd.conf config file.
authoritative;
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.2 192.168.1.250;
[Code]...
How to can I host my own domain by myself for free?I've installed phpmyAdmin, ehcp, filezilla, mySql, mySql query browser, proftpd, gforge, wordpress, activeperl.I'm not sure either how to make a domain name for my IP address and how to use dynamic DNS.
1) OK, I've got to admit that I'm a newbie in networking.
2) I'm lost with tons of different programs, I don't know where to start from now, there are many methods. I have made many user names and passwords...
3) What to do? I don't want a local web page, All I want is get my web page on Internet where anyone else can visit it.
I have a laptop "fura1" with two interfaces, eth0 (Ethernet) and eth1 (wifi), which I assign IPs 192.168.1.10 and 192.168.1.11 respectively. Then a desktop "fura2" with only one interface eth0 (Ethernet). Both are connected to a local network along with other appliances. My doubts arise on how to configure the /etc/hosts file of the desktop "fura2" taking in account that "fura1" has two interfaces, so two IP, but, obviously, only one hostname.
My first attempt for /etc/hosts of "fura2" was:
127.0.0.1localhost
127.0.1.1fura2
192.168.1.10 fura1 fura1.workgroup
192.168.1.11 fura1 fura1.workgroup
192.168.1.102 PDA PDA.workgroup
192.168.1.103 MT MT.workgroup
But it seems to my that assigning two different IPs to the same host is not a good solution. On the other hand, if I give different name to each interface, I will got a host with two hostname (?).
I am currently running ubuntu on a qemu-kvm virtual machine, and the host is fedora. I would like to mount a folder of the host machine on my VM, but never succeeded. The result of the command is :
root@armnlib-kvm:~# mount -v 192.168.1.10:/nfs /nfs
mount: no type was given - I'll assume nfs because of the colon
mount.nfs: timeout set for Thu Jul 7 06:02:43 2011
[code]....
And the showmount -e on the host gives :
Export list for cudak:
/nfs 10.0.2.15
Host - Fedora 12 64bit
KVM
VM - Windows Server 2008 64 bit
bridge-utils
VM can ping host and Internet but host can't ping VM.
I set VM static IP 192.168.0.205.
It turns out dynamic IP - 192.168.0.55
On host:
$ ping -c3 192.168.0.55
fails
I am currently running ubuntu on a qemu-kvm virtual machine, and the host is fedora.
I would like to mount a folder of the host machine on my VM, but never succeeded.
The result of the command is:
And the showmount -e on the host gives:
Domain name which is registered on the DNS for an IP and the name of the host with that IP need not be the same. am i right? I mean domain name and host name need not be the same. Is this correct?
View 2 Replies View RelatedI've got two Linux machines plugged into my school's LAN, connected using DHCP: their IP addresses are randomly assigned. I'd like to be able to let them automagically find each other's IP.
View 1 Replies View RelatedI have installed NXServer from NOMachine and I want to connect to my home computer from work. Because the router at my house is dynamic as is the wireless to this computer how do i go about setting up a host name for one of these computers? I am running the latest debian. I also intend to use this computer eventually as a file and web server so this would be extremely benificial
View 2 Replies View RelatedI have installed fedora 11 in my system , during the installation process it prompted me to enter the IP ,local host and local domain name .i have entered something .but my question is that how to change that IP and the domain name which i was given in the installation process.
View 2 Replies View RelatedI have Centos installed and runing Vmware server inside, inside the Vmware server i have two V MAchines runing, how can i let those machines run outside the host ( mean listen to other computers in the outside network, i am after proxy server.
View 1 Replies View RelatedI use linux.
I have below error, no route to host.
I am setting up a server, with a static IP address. I thought I did the setup correctly, including setting up the static IP address. When the system restarted, I saw a message flash about some other host already uses address 72.86.26.xxx
Then, once logged in, I got a system message: System is not receiving updates, check network connection.
I went to System: Network Configuration, and under Devices, I saw:
Inactive Device: eth0
I clicked on activate, and I received the same message: some other host already uses address 72.86.26.xxx
The file /etc/sysconfig/networking/devices/ifcfg-eth0 reads:
#realtek Semiconductor, Ltd. ...
DEVICE=eth0
BOOTPROTO=none
BROADCAST=72.86.26.255
[Code]....
I am running a server that needs both a wired and wireless connection with static IPs, with wireless as the default link. I'm using the SMCWUSB-G for wireless. I was running Debian for a while and had some routing tables set up as in [URL].... Everything worked until I recently switched to Ubuntu Server 9.10. After the switch a weird behavior showed up: if wlan0 is down, eth0 works fine. But if wlan0 is up, I can't reach any host with either interface (even nameservers or the gateway I am supposedly connected to). ifconfig indicates that nothing is wrong. It's really not clear what is causing this problem. It seems like something has to be wrong with both the wireless hardware/drivers and the routing tables in order for turning wireless on to interfere with "ping -Ieth0".
[code]...
I am using ubuntu 9.10 and I still cannot figure out this thing. I work behind a proxy managed by my university. Now, I cannot ping the other users on my network although they can ping me. Not to mention, I also cannot ping [URL]... It says : ping: unknown host [URL]... But I can ping the proxy server.
View 4 Replies View RelatedI have 3 computers on a local home network. Computer 1 is not receiving incoming anything from other computers on the network, and I don't know why. The regular internet works fine. Computer 1 can ping and ssh into either 2 or 3. 2 can ping and ssh into 3 and vice versa. But nothing can ping OR ssh into 1. Trying to do so says "no route to host". All computers are running Ubuntu Karmic. I don't even know where to start figuring out what's causing this, but it's probably something simple. I'm using the IPs I found listed in my wireless router's web-based control panel.
View 9 Replies View Related