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  • how to setup sonicwall tz210 to port forward packets received from external ip to another external ip

    - by lplp
    i have a sonicwall tz210 on a fixed ip, say ip1. And then i have, let's say a legacy server, with external ip ip2, which sends data to ip1 (and I have another server on ip1 behind the sonicwall which receives and processes that data). I would like to set up a new server on a different external ip ip3 that will receive and process data from the legacy server. How can I setup the sonicwall so that the packets received from the legacy server (from an external ip) are port forwarded to the external ip address ip3?

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  • Alternate port numbers for Supermicro IPMI View software

    - by MC9000
    I'm using the IPMI View software to manage a SuperMicro server but would like to use alternate port #s within the program itself. In other words - If I use the web browser, it defaults to port 80 - While I can, say change that port to 12345 (or whatever) and type the IP address into the browser (like http://xxx.xxx.xxx.xxx:12345 ) that works just fine. However, in IPMIView, it will assume port 80 and load the browser with the IP (which, naturally, won't work, so I have to manually type in the alternate port #). I can deal with that. The clincher is if I use a port other than 623 for management - (say 55623 for example), the IPMIView will not find it. Same goes for the iKVM port #. Is there some place to specify this (to tell IPMIView to use the alternate port numbers), like a settings file? I'm running this from a Windows client.

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  • Connecting to named Instances Using Port Number

    - by blakmk
    I came across an interesting situation where a developer was trying to connect to a named instance using a DNS alias without specifying the instance name. Coincidently though he remembered to include the port number and miraculously it worked. So it appears that sql server accepts connections to a specific instance based on its port number. While it may not seem to particularly useful, I can imagine it could be used in the following situations: To mirror to a server with a different instance name (but same port number) To hide the complexity of instance names from end users and just rely on port number (and optionally dns alias)

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  • Win server 2008 change port of RD Gateway

    - by Mel
    Is it possible to change the port used by RD Gateway. I know its integrated with IIS and it uses port 443 (SSL) so i've changed my IIS bindings to use a different port for SSL communications. however, I can't find any way to specify the RD gateway port in the RD client. Has anyone ever done this before? Reason I'm asking is, my ISP just recently blocked port 80 and 443 so I am forced to use another port.

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  • Mass Port Forwarding?

    - by Devoted
    Hi I had trouble but I finally port forwarded 21-23 and thus got SSH working on my Ubuntu machine. If I want to do other things with it such as FTP, should I just port forward 1-10000 so I don't have to worry about port forwarding each individual port? What are the advantages/disadvantages of this?

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  • How do I make a virtualised WAN?

    - by EnchantedEggs
    I want to create a virtualised WAN. As in, I want to have a couple of VMs (VBox) on one physical host machine, that exist on separate LANs, but that can talk to each other. Do I make the VMs, set them up with different IP addresses (e.g. 1.2.3.4 and 5.6.7.8) and then configure port forwarding between them somehow??? I've seen articles that set up port forwarding on port 2222, but I don't really understand why this works. How is setting up the VM to listen to port 2222 and then port forward from there to, say, port 80, any different from just telling the VM to listen on port 80 in the first place? FYI, the VMs run Ubuntu Desktop 14.x.

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  • Software to create a virtual parallel port in Windows XP?

    - by drknexus
    I am writing a program that will eventually be used on a computer with a physical parallel port and will need to set certain pins high or low in order to signal to an external device. However, the development laptop I am using does not have any physical parallel ports and is too low powered to run a virtual machine. Is there any option available that will create a virtual parallel port within Windows XP? Ideally it would include a debug mode that would allow me to see what values have been pushed out on the parallel port.

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  • Can't connect to web-server on local host behind NAT

    - by eyeinthebrick
    I got Ubuntu as host. I'm running a web-server on http://192.168.199.8:80. It is accessible from the local network, but when I'm trying to reach it by external IP, I go to my router's web-page. I arranged port forwarding on router for port 80 to my local IP 192.168.199.8. Unfortunately web-server is still unavailable via external IP. I checked whether the port is open via http://www.canyouseeme.org/. As it showed that the port is unavailable, I changed port used to 3659 (not forget to rearrange port forwarding rule). Although http://www.canyouseeme.org/ shows that port 3659 is open, I still can't reach my web-server. Where can the problem be?

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  • A lot of connections to port 6881 - some new attacks or what ?

    - by stoleto
    Ok so i am the admin of a small network with a web server and only the web server has a direct connection to the internet, the rest of the network are connecting through another place. I was inspecting the traffic on the server with tcpdump, and i found a LOT of connections from different IP addresses to port 6881. All ports on my machine are blocked except those who are really needed for a web server (like port 80), so i checked it out and confirmed that 6881 and the rest ports are in filtered(firewalled) state. Why all those ips are continuously trying to make connection to the server on port 6881 no matter it's not open at all ? Is this some new kind of attack or maybe there's some new exploit (maybe 0day?) for some service running on 6881 ? AFAIK on 6881 operate the bittorrent and similar, so really, what's the deal ? It would be nice if someone clarifies me some things.

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  • Open ports broken from internal network

    - by ksvi
    Quick summary: Forwarded port works from the outside world, but from the internal network using the external IP the connection is refused. This is a simplified situation to make the explanation easier: I have a computer that is running a service on port 12345. This computer has an internal IP 192.168.1.100 and is connected directly to a modem/router which has internal IP 192.168.1.1 and external (public, static) IP 1.2.3.4. (The router is TP-LINK TD-w8960N) I have set up port forwarding (virtual server) at port 12345 to go to port 12345 at 192.168.1.100. If I run telnet 192.168.1.100 12345 from the same computer everything works. But running telnet 1.2.3.4 12345 says connection refused. If I do this on another computer (on the same internal network, connected to the router) the same thing happens. This would seem like the port forwarding is not working. However... If I run a online port checking service on my external IP and the service port it says the port is open and I can see the remote server connecting and immediately closing connection. And using another computer that is connected to the internet using a mobile connection I can also use telnet 1.2.3.4 12345 and I get a working connection. So the port forwarding seems to be working, however using external IP from the internal network doesn't. I have no idea what can be causing this, since another setup very much like this (different router) works for me. I can access a service running on a server from inside the network both through the internal and external IP. Note: I know I could just use the internal IP inside of the network to access this service. But if I have a laptop that must be able to do this both from inside and outside it would be annoying to constantly switch between 1.2.3.4 and 192.168.1.100 in the software configuration. Router output: > iptables -t nat -L -n Chain PREROUTING (policy ACCEPT) target prot opt source destination ACCEPT all -- 0.0.0.0/0 224.0.0.0/3 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25 to:192.168.1.101 DNAT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:25 to:192.168.1.101 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:110 to:192.168.1.101 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:12345 to:192.168.1.102 DNAT udp -- 0.0.0.0/0 192.168.1.1 udp dpt:53 to:217.118.96.203 Chain POSTROUTING (policy ACCEPT) target prot opt source destination MASQUERADE all -- 192.168.1.0/24 0.0.0.0/0 Chain OUTPUT (policy ACCEPT) target prot opt source destination

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  • SSH from external network refused

    - by wulfsdad
    I've installed open-ssh-server on my home computer(running Lubuntu 12.04.1) in order to connect to it from school. This is how I've set up the sshd_config file: # Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for #Port 22 Port 2222 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key HostKey /etc/ssh/ssh_host_ecdsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH #LogLevel INFO LogLevel VERBOSE # Authentication: LoginGraceTime 120 PermitRootLogin no StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding no X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net Banner /etc/sshbanner.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes #specify which accounts can use SSH AllowUsers onlyme I've also configured my router's port forwarding table to include: LAN Ports: 2222-2222 Protocol: TCP LAN IP Address: "IP Address" displayed by viewing "connection information" from right-click menu of system tray Remote Ports[optional]: n/a Remote IP Address[optional]: n/a I've tried various other configurations as well, using primary and secondary dns, and also with specifying remote ports 2222-2222. I've also tried with TCP/UDP (actually two rules because my router requires separate rules for each protocol). With any router port forwarding configuration, I am able to log in with ssh -p 2222 -v localhost But, when I try to log in from school using ssh -p 2222 onlyme@IP_ADDRESS I get a "No route to host" message. Same thing when I use the "Broadcast Address" or "Default Route/Primary DNS". When I use the "subnet mask", ssh just hangs. However, when I use the "secondary DNS" I recieve a "Connection refused" message. :^( Someone please help me figure out how to make this work.

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  • Rebol Multitasking with Async: why do I get Invalid port spec

    - by Rebol Tutorial
    I tried http://www.mail-archive.com/[email protected]/msg19437.html (I just changed to www.reboltutorial.com) : do http://www.rebol.it/giesse/async-protocol.r handler: func [port [port!] state [word! error!] /local tmp cmd] [ if error? :state [print mold disarm state return true] switch state [ connect [ ; do HTTP request insert port {GET /files/2009/10/word.png HTTP/1.0^M^JHost: www.reboltutorial.com^M^J^M^J} false ] read [false] write [false] close [ ; get data data: copy port close port ;print copy/part data find data "^M^J^M^J" data: to binary! find/tail data "^M^J^M^J" other/image: attempt [load data] other/text: "" show other false ] ] ] port: open async://www.reboltutorial.com:80 port/awake: :handler view layout [ across me: box 100x100 random 255.255.255 0:00:00.5 feel [ engage: func [f a e] [ if a = 'time [ me/color: random 255.255.255 show me ] ] ] other: box 100x100 255.255.255 "Downloading image..." Return Area 208x100 "You can type here while downloading." ] ] But I'm getting this error: >> port: open async://reboltutorial.com:80 ** Access Error: Invalid port spec: async://reboltutorial.com:80 ** Near: port: open async://reboltutorial.com:80 >> port/awake: :handler ** Script Error: port has no value ** Near: port/awake: :handler

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  • iptables forwarding to a dummy interface

    - by madinc
    Hi, I'm trying to accomplish the following: I have a box with a service listening on a dummy interface (say 172.16.0.1), udp port 5555. Now what I'd like to do is to take packets that arrive on interfaces eth0 (1.1.1.1:5555) and eth1 (2.2.2.2:5555) and forward them to the service on the dummy interface, and have replies go back to clients out the same physical interface they came in. Clients must think they're talking to 1.1.1.1:5555 or 2.2.2.2:5555. I think I need a mix of iptables rules and packet marking, plus some iproute rules (if it's possible at all). What I tried is to catch packets coming in from eth0 and eth1, udp port 5555, and mark them with 1 and 2 respectively, and --save-mark in the connmark. Then I used a DNAT to 172.16.0.1. The service seems to be getting the packets. Now I'm not sure how to do the reverse. It seems that for packets originating from the box, you can't do anything before the routing decision, but that would be the place to restore the marks, and thus make a routing decision based on those. Here's what I have so far: iptables -t mangle -A PREROUTING -d 1.1.1.1 -p udp --port 5555 -j MARK --set-mark 1 iptables -t mangle -A PREROUTING -d 2.2.2.2 -p udp --port 5555 -j MARK --set-mark 2 iptables -t mangle -A PREROUTING -d 1.1.1.1 -p udp --port 5555 -j CONNMARK --save-mark iptables -t mangle -A PREROUTING -d 2.2.2.2 -p udp --port 5555 -j CONNMARK --save-mark iptables -t nat -A PREROUTING -m mark --mark 1 -j DNAT --to-destination 172.16.0.1 iptables -t nat -A PREROUTING -m mark --mark 2 -j DNAT --to-destination 172.16.0.1 # What next? As I said, I'm not even sure it can be done. To give a bit of background, it's an old OpenVPN installation that cannot be upgraded (otherwise I'd install a recent version that supports multihoming natively). Thanks for any help.

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  • Issues with forwarding Iptables

    - by Ricardo Rios
    I have some issues with my redirectioning lines on iptables, it seems it does not work, any help will be appreciated iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -s 192.168.2.0/24 -o eth0 -j SNAT --to 10.10.10.1 iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j DNAT --to 10.10.10.1:8080 iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8081 -j DNAT --to 192.168.2.51:8081 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34551 -j DNAT --to 192.168.2.51:8081 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8082 -j DNAT --to 192.168.2.52:8082 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34552 -j DNAT --to 192.168.2.52:8082 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8083 -j DNAT --to 192.168.2.53:8083 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34553 -j DNAT --to 192.168.2.53:8083 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8084 -j DNAT --to 192.168.2.54:8084 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34554 -j DNAT --to 192.168.2.54:8084 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8085 -j DNAT --to 192.168.2.55:8085 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34555 -j DNAT --to 192.168.2.55:80 echo Ejecutadas Reglas del Firewall

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  • How do I detect server status in a port scanner java implementation

    - by akz
    I am writing a port scanner in Java and I want to be able to distinct the following 4 use cases: port is open port is open and server banner was read port is closed server is not live I have the following code: InetAddress address = InetAddress.getByName("google.com"); int[] ports = new int[]{21, 22, 23, 80, 443}; for (int i = 0; i < ports.length; i++) { int port = ports[i]; Socket socket = null; try { socket = new Socket(address, port); socket.setSoTimeout(500); System.out.println("port " + port + " open"); BufferedReader reader = new BufferedReader( new InputStreamReader(socket.getInputStream())); String line = reader.readLine(); if (line != null) { System.out.println(line); } socket.close(); } catch (SocketTimeoutException ex) { // port was open but nothing was read from input stream ex.printStackTrace(); } catch (ConnectException ex) { // port is closed ex.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if (socket != null && !socket.isClosed()) { try { socket.close(); } catch (Exception e) { e.printStackTrace(); } } } } The problem is that I get a ConnectionException both when the port is closed and the server cannot be reached but with a different exception message: java.net.ConnectException: Connection timed out: connect when the connection was never established and java.net.ConnectException: Connection refused: connect when the port was closed so I cannot make the distinction between the two use cases without digging into the actual exception message. Same thing happens when I try a different approach for the socket creation. If I use: socket = new Socket(); socket.setSoTimeout(500); socket.connect(new InetSocketAddress(address, port), 1000); I have the same problem but with the SocketTimeoutException instead. I get a java.net.SocketTimeoutException: Read timed out if port was open but there was no banner to be read and java.net.SocketTimeoutException: connect timed out if server is not live or port is closed. Any ideas? Thanks in advance!

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  • "Can't open display" even after access with xhost

    - by Yann
    I'm trying to run a graphical program remotely, without using ssh. I've set the display variable on the server (let's say server.com, Linux, not ubuntu, and no su rights) to point to my workstation (workstation.com, ubuntu 10.04) setenv DISPLAY workstation.com:0 Then on my workstation I've tried both xhost +server.com and xhost + Then I ssh into the server (to test things): ssh [email protected] and try to run xclock, and get the following error: Error: Can't open display: workstation.com:0 I've looked at /etc/ssh/ssh_config on the workstation and I should be forwarding correctly: X11Forwarding yes. How do I go about troubleshooting this? What logs on the workstation document these failed attempts? To explain why I'm doing this: I want to run a batch job on a server to debug an MPI-based parallel program. I want to run xterm as the batch job executable, per the instructions provided by the system admins. This setup use to work. I reinstalled things on my workstation and since then I frequently get one-time message along the lines The authenticity of host 'hostname (XXX.XXX.XXX.XX)' can't be established. My attempt to fix the above was to move my ~/.ssh/known_hosts file to a back up on both server and host, and then to ssh from each to the other with the flag -o StrictHostKeyChecking=no. I no longer get that message, but I was wondering does this play a part in why X11 forwarding is not working?

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  • ssh agent forwarding with many identities

    - by Eddified
    I have setup ssh agent forwarding, and I know it works. I also have many keys setup in the agent. The problem is there are so many keys that I get: Received disconnect from XXX.XXX.XXX.XXX: 2: Too many authentication failures for bob The way around this is to use IdentitiesOnly=yes so that ssh will only send the identity you want it to for the specified host. I've also gotten this implemented and I know it works, without agent forwarding. Now, I'm trying to combine the two features. That is, I want to use agent forwarding, but also be able to specify which identity to use when connecting. Problem is, I can't figure out how to do this. So, I want to connect from box A through box B to box C. Box A has all of the identity files and the ssh agent running. I want to edit box A or B's ssh config file(s) to use a specific identity that exists in box A's agent (which is being forwarded).

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  • Configure IIS Web Site for alternate Port and receive Access Permission error

    - by Andrew J. Brehm
    When I configure IIS to run a Web site on Port 1414, I get the following error: --------------------------- Internet Information Services (IIS) Manager --------------------------- The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020) However, as according to netstat the port is not in use. Completely aside from IIS, I wrote a test program (just to open the port and test it): TcpListener tcpListener; tcpListener = new TcpListener(IPAddress.Any, port); try { tcpListener.Start(); Console.WriteLine("Press \"q\" key to quit."); ConsoleKeyInfo key; do { key = Console.ReadKey(); } while (key.KeyChar != 'q'); } catch (Exception ex) { Console.WriteLine(ex.Message); } tcpListener.Stop(); The result was an exception and the following ex.Message: An attempt was made to access a socket in a way forbidden by its access permissions The port was available but its "access permissions" are not allowing me access. This remains after several restarts. The port is not reserved or in use as far as I know and while IIS says it is in use, netstat and my test program say it is not and my test program receives the error that I am not allowed to access the port. The test program ran elevated. The IIS Site is running MQSeries, but the MQ listener also cannot start on port 1414 because of this issue. A quick search of my registry found nothing interesting for port 1414. What are socket access permissions and how can I correct mine to allow access?

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  • certificate error while subdomain forwarding

    - by rahulchandran
    I have a website, call it http://sub.example.com, hosted on, say, 72.xx.xx.x. There is a certificate for https://sub.example.com. Now I go into the DNS management tool in my hosting provider, and I set up the standard subdomain forwarding wherein https://sub.example.com forwards to 72.xx.xx.x. Now when I try to browse to https://sub.example.com, I get a certificate error saying it is for the wrong website. I have also tried forwarding http://sub.example.com to 72.xx.xx.x, and tried it with domain masking in both cases. I am still getting the certificate error no matter what. Additional wrinkle: if someone types in https://sub.example.com then the domain forwarding does not seem to work and IE just spins endlesssly and finally fails. How can I domain forward the https://sub.example.com to 72.xx.xx.x?

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  • Find users that are auto forwarding / redirecting their email in Exchange 2010 using Powershell

    - by Ryan H
    We are using Live@edu, which is essentially hosted exchange server with some additional features and limitations to work around, and I'm trying to find everybody that is forwarding or redirecting emails from their accounts. I am trying to remove old accounts that have not been used, but we have instructions for users on redirecting emails, so we should expect that some users are indeed redirecting their emails, which will make their last login/logoff times not reflect whether they are indeed using auto forwarding or auto redirecting rules. How could I find a list of users with forwarding or redirection rules using Exchange 2010 Powershell Cmdlets? /EDIT: It may be sufficient for my purposes to find whether there are ANY server side rules, regardless of whether the rule forwards/redirects or does some other action.

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  • Fix X11 forwarding on OSX

    - by Such
    I am looking for a way to fix/debug a X11 forwarding session on OSX. Here is my situation: From my mac I connect to a Ubuntu workstation with ssh -X (tried ssh -Y as well). X11 forwarding works perfectly with firefox for instance, X11/Quartz is started automatically on OSX and firefox is displayed. X11 forwarding does not work with bat (Bacula graphical console): X11 is started but no window is displayed. There are no errors (/private/var/log/system.log). When I try doing the same from another Ubuntu workstation, it works perfectly for both firefox and bat. I guess the problem is on OSX side then. I tried switching some options in X11 but nothing works. Would you have any idea on how to move forward? Thanks!

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