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• Ubuntu 8.04 LTS MySQL port remote access

  - by Stig Christian

  Hi! I have tried everything I know, but still no solution to this problem. MySQL works perfectly on localhost, but it seems port 3306 is blocked from the outside... I have commented out "bind-address" in /etc/mysql/my.cnf, and there is no iptables rules that deny this port. (I have even opened the port in iptables just to be sure) Still I can`t connect to the server from a remote connection (telnet or portscan returns negative results). Where is the problem?

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• How to stop listening on an HTTP::Daemon port in Perl

  - by Trevor

  I have a basic perl HTTP server using HTTP::Daemon. When I stop and start the script, it appears that the port is still being listened on and I get an error message saying that my HTTP::Daemon instance is undefined. If I try to start the script about a minute after it has stopped, it works fine and can bind to the port again. Is there any way to stop listening on the port when the program terminates instead of having to wait for it to timeout? use HTTP::Daemon; use HTTP::Status; my $d = new HTTP::Daemon(LocalAddr => 'localhost', LocalPort => 8000); while (my $c = $d->accept) { while (my $r = $c->get_request) { $c->send_error(RC_FORBIDDEN) } $c->close; undef($c); }

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• Java: How to clear socket bindings

  - by Matt1776

  I am having a few issues with sockets within my Java SIP client. When I bind to an address and port, if something goes wrong I have to attempt to reconnect, usually after I've stopped and restarted the process. Problem with that is then the port is bound and I am forced to increment the local port. How can I remove the binding to the port I am targeting before binding to it? If that isnt possible, then how can I trap the process just before it ends so that I can locate the socket binding and close it manually?

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• Using a Dell DRAC virtual console through a NAT firewall

  - by jetboy

  I have two Dell Poweredge R210 servers, both running Ubuntu 10 Server x64. Server A has a Dell DRAC ILO card (on 172.16.96.91), and both the server and the DRAC use Server B as a gateway (with server B's WAN IP being xxx.xxx.xxx.xx). Server B uses the following NAT rules in IPTables to route traffic through to Server A's DRAC: *NAT --append PREROUTING --in-interface eth1 --protocol tcp --destination xxx.xxx.xxx.xx --destination-port 8019 --jump DNAT --to-destination 172.16.96.91:443 --append POSTROUTING --out-interface eth1 --jump SNAT --to-source xxx.xxx.xxx.xx This works fine for accessing Server A's DRAC via Server B, apart from the Java virtual console. This fails with the following error: com.sun.deploy.net.FailedDownloadException: Unable to load resource: https://xxx.xxx.xxx.xx:443/software/avctKVM.jar at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source) etc. I know that the Java console uses port 5900, and possibly ports 83 and 5891. Can anyone help me in getting this working?

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• Web server behind MikroTik and dynamic dns

  - by danielrvt

  I recently purchased a MikroTik router, it works great! However, I haven't been able to make my web server work from outside my lan I'll explain better: I have two domains in my disposal, before I switched to Mikrotik, the were working perfectly and all my websites were online. Since I changed the router, every time I try to access my websites from outside my lan, my websites can't be found. I have my websites domains associated with a dynamic dns provider, I managed to create a port forwarding rule to redirect all my incoming traffic from port 80 to my web server, and it works, but only when I'm connected to my MikroTik router. Is there something else I have to do? PD: I also created a static dns rule in my router with my domains to associate it to my webserver (which is behind my router) PD2: All I want is to redirect requests from outside to my webserver...

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• DYNDNS setup with TightVNC on Windows Server 2008 R2

  - by StealthRT

  Hey all, i seem to be having a problem with getting ports to forward on my Windows Server 2008 R2 PC. I already set all my port forwarding for 5900/5800 on my router for my PC's IP address (192.168.1.22) but when i try to use the TightVNC PFPortChecker on port 5900 it tells me its not opened! I can not even connect to my DYNDNS server name (xxxxxxx.dyndns.org). As a side note, i am running Windows XP SP3 within a VirtaulBox inside Windows Server 2008 R2 but running the PFPortChecker in Windows 2008 R2 brings the same results as it does in the VM. I also added them to the Windows Firewall Advanced Security form to add those inbound ports for full access. What could i possibly be missing? Thanks for your time! David

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• Networked Parallel Port in Linux / KVM / QEMU

  - by korkman

  What I want to use is the "-parallel" tcp or udp option from KVM / QEMU, but I don't seem to find any server for this client. I don't serve a printer but a hardware dongle. I checked ser2net, which does provide "/dev/lp0" sharing, but it doesn't seem to work for KVM / QEMU. I suspect KVM / QEMU requires "/dev/parport0". I did rmmod lp, modprobe ppdev, linked ser2net to parport0, but it didn't work out. Perhaps ser2net is not suited for this. I tried socat as well, and I tried netcat. No success. Does anyone know any KVM / QEMU compatible parallel port server? Or did any of netcat, socat or ser2net work for you?

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• How to open ports on modem for better torrent performance

  - by Mehper C. Palavuzlar

  I've been using utorrent to download and upload torrents for a long time. Recently someone told me that I need to open port(s) for utorrent from my modem settings for better downloading and uploading performance. Is it true? If yes, how can I do that? My utorrent version: 2.0 and the port used for incoming connections: 61829. My modem: Yaksu S200 ADSL router modem and I can reach its settings via web interface. I looked at the settings but they seem a bit complicated to me. Other info you may need to know: I have dynamic IP. I'm using Win7 x64.

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• How can I connect JConsole to WebLogic using the WL SSL Listen Port

  - by Mircea Vutcovici

  I would like to be able to use JConsole on remote WebLogic servers via the multiplexer port on SSL. Is it possible this without doing any configuration changes WebLogic? Only by adding some jars (e.g. wljmxclient.jar) or parameters to JConsole. I've tried with variations of the following command without success: $JAVA_HOME/bin/jconsole -J-Djava.class.path=$JAVA_HOME/lib/jconsole.jar:\ $JAVA_HOME/lib/tools.jar:$WL_HOME/server/lib/wljmxclient.jar \ -J-Djmx.remote.protocol.provider.pkgs=weblogic.management.remote -debug \ service:jmx:rmi:///jndi/iiop://server_name:7441/jmxrmi I think that one of the problem is that the SSL is not enabled in JConsole.

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• Amazon EC2: Not able to open web application even if port it opened

  - by learner

  I have a t1.micro instance with public dns looks similar to ec2-184-72-67-202.compute-1.amazonaws.com (some numbers changed) On this machine, I am running a django app $ sudo python manage.py runserver --settings=vlists.settings.dev Validating models... 0 errors found Django version 1.4.1, using settings 'vlists.settings.dev' Development server is running at http://127.0.0.1:8000/ I have opened the port 8000 through AWS console Now when I hit the following in Chrome http://ec2-184-72-67-202.compute-1.amazonaws.com:8000, I get Oops! Google Chrome could not connect to WHat is that I am doing wrong?

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• Can i safely block all ports on my sever

  - by Saif Bechan

  I have a web server running pleks and get attacked a lot every day. I configured a firewall, and there are some predefined services such as www, and ftp, etc. I am planning to block all the ports except for the www port and the PLESK port. When I need ftp or ssh access for example i will open the ports in PLESK and then start to work. Is this a good thing to do or are there some downsides on doing this. There are some ports I am not sure of, such as SMTP,POP3,IMAP, DNS. Can i close these ports or is there no need to do so.

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• Multiple VLAN on one switch port

  - by Macropus

  I have a HP ProCurve 1810G-8 which I currently use as a normal switch between 3 servers and a firewall. 2 of the servers are ESXi hosts, and one is a Nexentastor box with 2 iSCSI target LUNs. As the iSCSI traffic is on the same LAN as all other traffic, I would like to switch this to use a SAN for iSCSI traffic and the LAN for all other traffic. The Nexentastor box only has 2 NICs, and as such, with a physical arrangement, I presume that one must be plugged into the SAN VLAN and one on the LAN VLAN ports of the switch. Is there a way to have multiple VLANs over the same port? e.g. the Nexentsator box has 2 NICs, both plugged into the switch, both ports with access to both of the VLANs?

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• Multiple IPs on Juniper SRX100 Untrust Port

  - by Will

  I am having trouble getting multiple IP addresses on the untrust port. I have tried a few different methods, but can't seem to get it to work. Does anyone have a good tutorial that is not easily found or if possible can type up the steps? I don't mind trying to do it through ssh, but would prefer web interface. Thank you ++++++++++++ Feb 1 fe-0/0/0 { unit 0 { family inet { dhcp { update-server; } } } } routing-options { static { route 0.0.0.0/0 next-hop 96.11.173.81; } } Right now it's setup to receive settings from 'cable modem' through dhcp, but I think it's only getting one IP.

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• DYNDNS setup with TightVNC on Windows Server 2008 R2

  - by StealthRT

  Hey all, i seem to be having a problem with getting ports to forward on my Windows Server 2008 R2 PC. I already set all my port forwarding for 5900/5800 on my router for my PC's IP address (192.168.1.22) but when i try to use the TightVNC PFPortChecker on port 5900 it tells me its not opened! I can not even connect to my DYNDNS server name (xxxxxxx.dyndns.org). As a side note, i am running Windows XP SP3 within a VirtaulBox inside Windows Server 2008 R2 but running the PFPortChecker in Windows 2008 R2 brings the same results as it does in the VM. I also added them to the Windows Firewall Advanced Security form to add those inbound ports for full access. What could i possibly be missing? Thanks for your time! David

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• Work firewall blocking Gmail IMAP port

  - by Sean

  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 AirPort Express), and prefer to use Sparrow to check my email. The problem is that our firewall blocks whatever port Gmail's IMAP server uses. I'm trying to figure out the easiest way to work around this. I'm guessing I'll need to use an SSH tunnel or VPN, but I'm looking for specific instructions. I'd prefer to only route the IMAP stuff around the firewall as opposed to using a VPN full time. I have two computers at home (one PC, one Mac Mini) that are always on and could probably act as a server if needed.

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• How to free port 80 for xampp to work

  - by Alfie

  Please help, I used to be running xampp and it was working perfectly. Then I wanted to try something out and I ran IIS instead of xampp. Now I want to go back to using xampp, but whenever I try to run the apache server it says: Busy... Apache started [port 80] If I go to http://localhost/ then it just says that it can't establish a connection to the server. I have turned off IIS, so I don't see why it shouldn't work. Any suggestions?

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• Linux: find thin server running on port 80 and kill it

  - by Andrew

  On my Linux server I ran: sudo thin start -p 80 -d Now I'd like to restart the sever. The trouble is, I can't seem to get the old process to kill it. I tried: netstat -anp But what I see on port 80 is this: Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN - So, it didn't give me a PID to kill... I tried pgrep -l thin but that gave me nothing. Meanwhile pgrep -l ruby gives me like 6 processes running. I don't really understand why multiple ruby threads would be running, or which one I need to kill... How do I kill / restart the thin daemon?

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• Convert from port numbers to protocol names in wireshark

  - by Berkay

  i'm simply using tshark -r botnet.pcap -T fields -E separator=';' -e ip.src -e tcp.srcport -e ip.dst -e tcp.dstport '(tcp.flags.syn == 1 and tcp.flags.ack == 0)' to see the all initiated "legal TCP" connections. However, i need the destination port number conversion to "http" "netbios" etc. i'm not using -n option, but still i get: 128.3.45.128;62259;208.233.189.150;80 This is what i'm trying to get: 128.3.45.128;62259;208.233.189.150;http or 128.3.45.128;62259;208.233.189.150;80;http is better option for me. any idea from tshark users? or any other tool suggestions?

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• Convert from port numbers to protocol names ?

  - by Berkay

  i'm simply using tshark -r botnet.pcap -T fields -E separator=';' -e ip.src -e tcp.srcport -e ip.dst -e tcp.dstport '(tcp.flags.syn == 1 and tcp.flags.ack == 0)' to see the all initiated "legal TCP" connections. However, i need the destination port number conversion to "http" "netbios" etc. i'm not using -n option, but still i get: 128.3.45.128;62259;208.233.189.150;80 This is what i'm trying to get: 128.3.45.128;62259;208.233.189.150;http or 128.3.45.128;62259;208.233.189.150;80;http is better option for me. any idea from tshark users? or any other tool suggestions?

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• How to open ports on router for better torrent performance

  - by Mehper C. Palavuzlar

  I've been using utorrent to download and upload torrents for a long time. Recently someone told me that I need to open port(s) for utorrent from my router settings for better downloading and uploading performance. Is it true? If yes, how can I do that? My utorrent version: 2.0 and the port used for incoming connections: 61829. My router: Yaksu S200 ADSL router modem and I can reach its settings via web interface. I looked at the settings but they seem a bit complicated to me. Other info you may need to know: I have dynamic IP. I'm using Win7 x64.

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• Two Routers - 1 Port Straight to First Router

  - by apples

  At my house we have two Wifi routers one's connected directly to the modem and the other is plugged in down stairs as a second network(Directly connected to the first router) Is there a way that I could make it so that I have the second router have its own network, but have one or two ports that would act as if they were directly connected to the first router? That way I can port forward to devices on the second router. Here are the information about the routers: Router 1 - Linksys WRT54G Running stock firmware Router 2 - Linksys E900 Running Tomato Firmware So to summarize what I'm asking is how would I have two networks from two routers but be able to connect directly to the first router through one of the ports on the second router. Here's a Visio Drawing of what I would like to look like

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• using iptables to change a destination port but keep the ip the same.

  - by Scott Chamberlain

  I am playing around with transparent proxies, The current way I am doing things is the program makes a request to a computer on port 80, I use iptables -t nat -A OUTPUT -p tcp --destination-port 80 -j REDIRECT --to-port 1234 to redirect to my proxy that I am playing with. the proxy will send out a request to port 81 (as all outbound port 80 are being fed back in to the proxy so I want to do something like iptables -t nat -A OUTPUT -p tcp --destination-port 81 -j DNAT --to-destination xxxx:80 The problem lies with the xxxx part. How do I change the destination port without changing changing the destination ip? Or am I doing this setup completely wrong, I am learning after all and constructive criticism is definitely appreciated.

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• The best software for users internet usage

  - by nikospkrk

  Hi, We are a small business using a Vigor 2820 as the internet router, and we'd like to install a software that could report any internet usage from our users. I already tried the "official" software made by Draytek called "SmartMonitor", but is reliability is a real issue as it doesn't seem to keep capturing packets after working 3 to 6hours (randomly), whereas Wireshark keeps capturing packets after that amount of time. As I'm really fed up with this tool, I'm looking for other solutions but I still want the same features: users statistics, websites ranking, users traffic, ... I already enabled the port mirroring feature, so it would be perfect if you could suggest me a port mirroring-based software (ideally freeware). I thought I had found the good one with Etherscout, but it just doesn't launch. I am even open to a tool that would "just" make some reports based on Wireshark captured files (*.pcap). Thank you for any of your suggestion, Nicolas.

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• Tomcat - virtualhosting - name / ip / port - based

  - by lisak

  Hey, what are the usage scenarios for these kinds of virtual hosting ? Name Based - typical tomcat virtual hosting, one HOME instance with many contexts, each as an individual host IP based / port based - multiple instances of tomcat ( how is it with performance and memory consuption?) running on IP aliases (virtual IPs) for one network adapter, usually behind http apache server that can run name based virtual hostings. Otherwise I can't figure out how would I forward requests in iptables/firewall based on IP address, which is just one. How is IP based virtual hosting done as to Tomcat and multiple instances ? I'd like to hear some usage scenarios from your experience. How are you running your applications. Cause there are applications having it's own modified classloader and they are developed in a way to run alone withing a tomcat instance. Then there are trivial applications which can run within one instance without problems. Many thanks

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• Automatically allowing SSH into a machine behind a UPNP router?

  - by GJ

  Hi I have a MacBook connecting to the Internet from behind various routers from time to time (home, office, etc). All of the routers support UPNP. I need to allow a co-worker to SSH into the machine, without configuring each router each time to forward port 22 to the MacBook. Is there any way to get the MacBook to use UPNP (or some other method) to automatically configure any supporting router that it is behind to forward port 22 to itself? That would allow the co-worker to SSH into the MacBook but just knowing its external IP, which is easy.

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