When I ping a destination IP address, it responds. However, when I try to telnet or ftp or sftp to the same IP address, it does not connect.
I do not know the physical location of the machine.
my company there is 1 RHEL5 server and around 50 systems connected to it( running windows ). I want to know who is pinging or telneting to the server how can I find this information on the server OR where should I look for this information in the linux.
if I want to explore on this topic (i.e. who is trying to connect to server, from where user accessing server, whats his/her ip, whats his/her os etc. ) where should I look for it on the net ??
When I execute a command (ping or telnet or ssh) on ip 192.168.0.20 it is ok.
If I execute the same command on
ip 192.168.0.020, it looks for
ip 192.168.0.18 instead of
ip 192.168.0.20
And it's the same for others ip if I put a 0 ahead last byte.
I'm running Telnet Server, VFTP, and VNC on a Fedora 14 box. The box's internal IP is 192.168.1.222 This machine is configured to live in the DMZ, The firewall is up on both the router and this box. I can remote in from home using our external IP. I can FTP. I can Telnet. All using our external IP. When i'm in the office, i can remote in using our external IP. I can FTP. I can Telnet. Again, all with the external IP. If i attempt to telnet 192.168.1.222 i get a connection refused. i can ping the 192.168 address
nmap tells me that all 1000 ports on 192.168.1.222 are closed
nmap tells me that my expected ports are open on the external IP.
.... This is a relatively new conundrum as it "used to work", and only appears not to since our last reboot (power outage). I know i have to be missing something simple here, but i differ to the experts.
I'm working on setting up access for our developer via Telnet, we are on a local network behind a physical firewall. I set up the standard Telnet service for Fedora15 and from localhost I can login via any user and root.... However I cannot login from another terminal on the LAN, even though I can ping and FTP to the fedora15 box. I added the firewall rules for telnet, that did not work, so I disabled the firewall, still cannot get a connection via port 25. I feel either port 25 is closed in another manor or the telnet is restricted to the localhost.
Also I cannot login to root to configure the Firewall Desktop GUI, only standard users, is this an issue? I also cannot login to the console as root even though I use the correct password.I can only su to root and sometimes it is a PITA. There must be some settings to clear these issues up...
Even ping google's ip address doesn't work. unknown host error using backtrack4 able to browse net with these settings.
My network settings:
What's the problem with these settings...
My problem is the following:I can only connect to the internet and download through the FTP, but not through HTTP.I am in a hospital at this moment and have a netbook (Lemote Yeelong). Also there is a computer here with internet access.I would like to access the internet by using the cable from the computer.I configured my netbook just like the local computer (same host name, same MAC address, DHCP), just to be sure.I can ping google.com and I also can download from ftp.debian.org though ftp.However, when I try to connect to google.com through epiphany, it just loads and loads without success
View 4 Replies View RelatedI'm trying to install Mandriva Spring 2010 for a friend on his laptop after MS Windows crashed. The installation appeared to work, but I've got an odd networking problem - firefox is unable to load URLs. Every URL I try returns a server not found error.
When I drop into bash I'm able to do the following
Code:
ping 66.102.9.103
ping google.com
However when I try
Code:
wget http://google.com
I just get a message that tells me that wget is "unable to resolve host address google.com'". This is odd - ping is able to resolve google.com, but wget isn't. I assume that firefox and Konqueror both have the same problem. Could it be cause I've specified the http protocol?
Since I installed FC11 I can't get vpnc to work (I always getno response from target").Also I can't ping any external IP even with the firewall disabled.What I see strange is that I had the same configuration in FC10 and the router configuration seems okay to me:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.64.64.64 * 255.255.255.255 UH 0 0 0 ppp0
[code]...
My Windows machine can ping Ubuntu by name, but Ubuntu can only ping the Windows machine by using it's IP address. This was working fine in both directions until I purged Samba. After purging Samba, I couldn't ping in either direction unless I used the IP address. I did some reading and found that Samba provides NetBIOS functionality that allows the machines to resolve host names without a DNS. Since I'm not running a local DNS, I decided to reinstall Samba. Unfortunately, I've not been able to restore it to full working condition. I don't want to use hosts files as all the IP addresses are assigned automatically by DHCP. I want to be able to access the Windows machine by name.
View 9 Replies View RelatedI can't ping by netbios name or fully qualified domain name, BUT nmblookup works just fine. I know it's a dns problem(s) I just don't know what or how to fix it. I'm very new to all of this(networking, domain administration, posting on forums etc) so I hope this is the right way to ask for help here. I've searched around the forums and the internet for a bit but I haven't found a solution to my problem yet.
here is some background on how the network is setup2 different domains sharing the same dhcp scope.
DC for DomainA is running windows 2003 std
DC for DomainB is running windows 2008 sbs
DC-A has ip of 192.168.1.249
DC-B has ip of 192.168.1.3
router is sonicwall (192.168.1.1)
DC-A is hosting both DHCP and DNS
there are 25 computers in DomainB and 1 computer (not in domain) with ubuntu 10.04 and Free Open Ghost running on it (dhcp off) all 25 computers can ping the fog server by name (and eachother) all 25 computers pxeboot to fog just fine
[Code]...
I've encountered a problem after doing a fresh install with xubuntu 10.10 (2.6.35-23-generic).some sites are blocked like [url]....if I do dig [url]....- I receive the A, CNAME records and the IP address and everything.when ping[url].... - I receive 'unknown host'.when ping <theipaddress> - I receive responses
View 2 Replies View RelatedIs it possible to log into a remote windows computer from my local linux computer and vice-versa using the "telnet" command?
View 2 Replies View RelatedI posted this already in the absolute beginner section, but no answer was found, so I thought I might try this place..Long story as short as possible:
- I installed Ubuntu 9.10 for a friend who was fed up with WinXP crashing all the time
- After the install, networks was broken. I could ping sites outside the LAN, could connect to the router via firefox, but NO application could access the web. - The router works just fine, I tried with my own notebook.
- Disabling ipv6 in grub (edit /etc/default/grub and 'sudo update-grub') seemed to solve the problem.
- Then update the standard packages + install restricted extras and boom, Network gone: No ping to sites outside the LAN, no nothing. Still can connect fine to the router and even the remote desktop connection works, connecting over the internet. But that's it.
I have tried setting the mpu to a value recommended by my isp, I have set static ip and dns, I really don't now what to try any more.
I am using an virtual machine. where I need to ping from one machine to another. earlier I was able to ping. But after going to google.com once, I cannot ping back to this machine.
But if I gave ping -I eth1 <IP> then I can ping.
I cannot install any package, so tell me solution which includes not installing any package.
I am setting up Ubuntu to be a firewall type device for a windows computer. (I later want to use Internet sharing or something like that.) The Ubuntu machine has two NICs. The internet NIC works but one light is always orange (even when there is no patch cable connected to it). I can access the Internet fine from the Ubuntu machine. I have a cross over cable connected to the second NIC. This cable connects to the Windows laptop. The windows laptop can ping the Ubuntu machine. But I cannot ping the windows machine from the Ubuntu machine. When I try to telnet to the Ubuntu machine from the Windows machine (over port 23 or 80) it says "cannot connect."
From the Ubuntu machine I issued this command:
# iptables -A INPUT -p tcp --dport 80 -j ACCEPT
I used ufw status and found that the firewall was not enabled on the Ubuntu machine. The default gateway of the second NIC is the IP address of the Windows machine. The default gateway of the Windows machine is the IP address of the Ubuntu machine.
I have this annoying problem since day one.I am testing out Red Hat RHEL5, everything is fine except DNS look up.If I ping www.google.com, it doesn't work, ping ip address it all works;if I bring up browser, put www.google.com it doesn't work, can't find the name, however, simply put ip address there it works.My DNS seeting seems ok, and the DNS works from Windows box.
View 2 Replies View RelatedI am trying to find the difference between the above two services. Both are under xinetd and can someone please explain the difference between them (is one more secure than the other one?)
View 1 Replies View RelatedI can't seem to get ping to work on my home computer. I actually have two separate installations of Ubuntu 9.10. One is at home, sharing space with Windows Vista (dual-boot) on a Dell Inspiron 1525. The other is at workusing Sun VirtualBox on a Windows XP host. ping works quite well at work, through VirtualBox. For example, Code:ping linuxcommand.org always gets 0% packet loss. However, when I do the same thing at home, I always get 100% packet loss.
View 1 Replies View RelatedI have an ubuntu kk laptop connected via wireless to my mixed network (xp, win7, other ubuntu), but i can not ping said machine or connect via ssh. Internet and smb-browsing ON this machine work, as does pinging FROM it. If this was a windows machine, I'd say a firewall is in the way, but since it's a vanilla karmic install, this should not be the case (or should it?).
View 2 Replies View RelatedI installed ubuntu 10.10 today and when i open the browser it doesn't show any sites. I tried
> ping www.google.com
ping : unknown host www.google.com
> telnet > open localhost
[code]....
I run an centos server. From the console I can ping google.com and get a reply. But when I ping another address say xyz.com, the IP address is resolved (11.22.33.44) but there is no reply. In the same network in our office from my desktop I ping [URL] and there is a reply.I turned of the firewall but still the same problem.
View 9 Replies View Relatedhow to go about getting Ubuntu to receive an ad-hoc wireless ICS enabled connection. The internet connection is shared through a virtual machine running XP (with the USB wireless dongle under XP's control), on my desktop PC, in order to escape my ISP's no NAT policy. Ubuntu is on both the desktop PC (the sender), and the laptop (the receiver). The desktop and laptop also run windows 7. I managed to get my laptop Ubuntu to connect to my virtual machine XP, by setting the IP, subnet and gateway of all wireless devices, as was suggested in [URL] - I did use the Network Manager GUI, but pinging the desktop doesn't work.
Even with the IP configuration, Windows 7 on the laptop receives the internet fine. The next step is getting Ubuntu to receive. I can do any kind of configuration in a virtual machine, such as install Ubuntu. In virtual machine XP I used 192.168.0.1 with subnet 255.255.255.0 and gateway 1.1.1.1. On the laptop Ubuntu 192.168.0.2 same everything else. I understand nothing about networks. I know there is stuff I can do in the console, but how will Network Manager cope with me doing that?
I use my computer as a gateway to the internet for the rest of the house which is split into two LANs. I also have VPN's linking the office side of the LAN to a remote site. All of the PC's other than mine that should have access to the VPN works, but my PC doesnt and I firmly believe this is because I need to add a static route. ping 192.168.10.1 doesnt work but ping -I eth2 192.168.10.1 does. 192.168.10.1 is the remote router on the other side of the VPN. I've tried this route:
Code: route add -net 192.168.10.0 netmask 255.255.255.0 gw 192.168.1.1 dev eth2 192.168.1.1 is my computer... the gateway for the rest of the house/office. My computer has a quad NIC, only 3 ports are used. WAN, LAN1 and LAN2. Aside from this routing issue, I have everything working perfectly.
I set up a virtual bridge for a virtual machine (qemu-kvm) using a qemutap interface:
Code:
# brctl show
bridge2 8000.0022648a3dcc no eth5
qemutap2
I can ping and ssh to the server ...
Then I try to copy (scp) a file (2.8 M) to the server and, near the end, the copy stops and the server stops responding to ping and is not able to ping nothing except itself.
"ifconfig down ; ifconfig up" and the server is on line again.
Yes, another newbie question. Just loaded and updated FC 10. Everything works great with dhcp. Tried to setup static ip to learn more about how to set it up and nothing seems to work. I'm connected to DSL via a router when I ifconfig I get:(basic stuff)inet addr: 192.168.1.7 Bcast: 192.168.1.255 Mask: 255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
I have also tried default gateway 192.168.1.255 and 192.168.1.254.Most of what I have tried above has come from linux websites and faq's.Keeping in mind I am worst than any new newbie you have ever worked with
I have recently bought a new laptop for this purpose. It is a Toshiba L555D-103. It was pre installed with Windows 7 (64 bit). I have now installed Ubuntu 9.10 (32 bit). It works perfectly when wired. But it does not when I try it wireless. It did work wirelessly with Windows 7, and I have many more both stationary and laptops working through the router, so I do not think the router is the problem.I am guessing that there are no drivers for the wireless to function, but I am not sure. I am guessing that there are no drivers for the Ethernet card ?
View 9 Replies View Relatedmy network was a dream to set up under ubuntu 9.10. all i had to do was enter pass key, then that was it. Works brilliantly.
Different matter with studio. The thing I notice in network connections is, it doesn't want to retain my pass phrase, if I go back into properties the phrase is blank. As far as I can tell the wireless card has been reconcognized and is communicating with router.
My system is: asus p5ql-vm epu, intel core2 duo 2.8 e7400, 4gb 1067 ddr2 ram, belkin f5d7050 v4000, edimax router.
Here is the info requested in the sticky:
kevin@ubuntu:~$ lsusb
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 003: ID 045e:00dd Microsoft Corp.
Bus 008 Device 002: ID 046d:c501 Logitech, Inc. Cordless Mouse Receiver
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
code....
I have a Proliant DL 120 G5 with CentOS 5.4 and I have installed a Brodcom Corporation Netxtrem BCM 5722 Gigabit Ethernet PCI. So I have two interfaces: eth0 broadcom eth1 Intel The eth1 works, instead eth0 don't work. I can ping itself and 127.0.0.1 but I can't ping the gateway. The results of netstat -nr is:
[code]....
Ive got a problem on my server ....installed Debian 5 , Webmin and than syscp settung up syscp ready ....
I try to ping "localhost" ansver ping: unknown host
I try to ping "localhost." there is a host with IP 127.0.0.1
I need it to change it in "localhost"
Is that the bind9 maybe?