So first off, it probably seems this question has been asked thousands of times before. but I did do a search, mostly archived posts that ended up being something other than a true ip blocking of the port. [URL]..
So my port 80 is truly blocked. Ive tried setting up the port forwarding on my router, Ive tried manually allowing all traffic on port 80 through ip tables. Ive even dabbled with setting up something like openDNS to see So far nothing, Im only available on my local network.
There has to be some way to do a redirect though. even something as simple as an htaccess file redirecting [URL].. xxxx (the space is there to avoid my url being interrupted by a smiley
I have Ubuntu Server (x64) installed on my box with Apache2 and Squid. For awahile port 80 (http) was fine, I could update packages and use wget. Then one random day port 80 became blocked for incoming traffic. I couldn't use apt-get and had to change to an ftp mirror to update. Also wget is not working.
My ISP (Cox) is blocking port 80 and I would like to know if there is a way to open it again. I am to taking about 8080, 8000 or 81 I want to use 80 so I can host my website and every one can access it without the need to put [url]:[PORT] at the URL
I have upgraded from 9.04 to 10.04. 9.04 found my usb connected printer ( LaserJet 6MP) with no problems. But 10.04 will not find the usb port to which my printer is connected. I have searched for a solution on the forum, and others seem to have a similar problem, but not recognized it. For some it seemed to have self corrected, but I am having no such luck. I have downloaded hplip from [URL]
Following their instructions, I have run "hp-setup" in Terminal. This gives the following output: Code: cs@cs-desktop:~$ hp-setup HP Linux Imaging and Printing System (ver. 3.10.5) Printer/Fax Setup Utility ver. 9.0 Copyright (c) 2001-9 Hewlett-Packard Development Company, LP
This software comes with absolutely No warning. This is free software, and you are welcome to distribute it under certain conditions. See COPYING file for more details. Searching... (bus=usb, search=(None), desc=0) error: No devices found on bus: usb After disconnecting and reconnecting the printer cable, I used the command "dmseg| tail"
Terminal output: Code: s@cs-desktop:~$ dmesg | tail [263.646972] Buffer I/O error on device fd0, logical block 0 [301.759023] end_request: I/O error, dev fd0, sector 0 [301.759033] Buffer I/O error on device fd0, logical block 0 [339.871189] end_request: I/O error, dev fd0, sector 0 [339.871199] Buffer I/O error on device fd0, logical block 0 [349.600055] usb 2-1: USB disconnect, address 2 [349.600258] usblp0: removed [361.712024] usb 2-1: new full speed USB device using uhci_hcd and address 3 [361.869251] usb 2-1: configuration #1 chosen from 1 choice [ 361.884062] usblp0: USB Bidirectional printer dev 3 if 0 alt 1 proto 2 vid 0x050D pid 0x0002
I interpret this to mean that the printer is seen from this command. Yet when I do the "lsusb" command, I get this output: Code: s@cs-desktop:~$ lsusb Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 003: ID 050d:0002 Belkin Components Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub This to me indicates that the printer is not seen by the "lsusb" command.
I would like to get my printer printing. I am trying to get hold of an older parallel Centronics printer cable with a DB25 at the other end to see if I can get the printer working with it. Have others done this with success?
In order to connect to the internet when i am at work i have to use a proxy server; the problem is that this proxy also blocks port xxxxx which is used by a internet radio station. Is there any way to be able to listen to that radio station?
I'm having an issue with ufw and Synergy. I'm trying to run my Xubuntu 10.10 desktop as a server, and my Xubuntu 10.10 laptop as a client. I can do this just fine as long as I either: Have ufw enabled on my client but disabled on my server Have ufw disabled on both my client and my server I have no custom rules added to iptables on my client. On my server, however, I have tried the following rules:
$ ufw allow from 192.168.0.0/24 to any port 24800 $ ufw allow from 192.168.0.0/24
Neither of these configurations works. ufw on my server seems to block my client's requests regardless of having port 24800 fully open from any local connection, or just flat-out fully allowing any incoming local connection. I'm not sure why ufw seems to be ignoring the rules I'm creating, but as it stands right now, the only way I can connect the two is if I have ufw on my server disabled. And I have tried to ping the two machines; each machine can ping the other, even if ufw is running on both.
And I can ping the router, as well, from both machines. Any ideas on where to go from here to troubleshoot? I should probably also add that I am using the same configuration file that I do on vanilla Ubuntu (with updated host names, of course), and I have no problems in Ubuntu. This seems to be specific to ufw and my Xubuntu desktop. I can paste the code for my server's configuration file, if desired.
I have cloned an embedded system that runs Opensuse 11 x86 using dd. The embedded system uses a simple serial device, by writing to the relevant device file (/dev/ttyS2, usually). Curiously, when I write to the same serial device on the newly cloned system (which, incidentally, has almost identical hardware), thusly:
echo hello > /dev/ttyS2 the command blocks for up to a minute, before finally returning without making the hardware do anything. I can boot into Opensuse's rescue system on the clone and successfully do exactly the same thing, as I can when I boot the original's "identical" operating system. Why might this problem occur? What can I do about it?
I am currently having problems with my server. Its being DDOSed. I have a vps with Centos 64bit. The attack I want to block is udp flood. I was trying to do something like this: iptables -I INPUT -p udp --dport 123 -m limit --limit 40/s -j DROP but instead of blocking certain hosts it blocks the whole port and during the attack its unreachable. How to limit packets per host or any other way to protect from udp flood.
I am currently running Debian 6. I would like to know if there is a way and how i would go about blocking a certain IP range from connecting to my server within a certain port range. Say for example.
i want to block ip range 123.123.123.* from connecting to my server on the ports 33000 - 43000. But, i want to allow them to connect on any other port range, and i want to be able to allow connections from my server to the blocked ip range on those same ports. so, blocking incoming only on the above port range.
I am at a loss how to prevent Denial of Service attacks to port 25 and not block legitimate connections from 2 Barracuda 800(s) and block smart phones such as iPhones/Blackberrys/iPhones that use the server smtp.server.com for email. Presently for port 25 RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 25 -j ACCEPT
The 2 Barracuda 800(s) make port 25 connections all the time, plus users with smart_phones have the incoming server type: IMAP pop.server.com smtp.server.com
Is there a way to keep Denial of Service attacks from happening with iptables rules without causing blocking to the Barracuda(s) that make constant port 25 connections & smart phones that poll? I was thinking if I allowed the Barracuda(s) in these lines -s (barracuda)24.xx.xx.xx -d (emailserver)24.00.xx.xx -p tcp -m tcp --dport 25 -m state --state NEW -j ACCEPT
Where the source would be the Barracuda going to the email server. It would be allowed, then I am left with how to allow other connections like Smart_Phones that connect via Port 25. I am thinking if I put rules in place doing connection counts in a minute it would result in errors connecting to the server and people would start complaining. Plus any limiting may result in blocking real traffic. Then would I need to allow the ISP range in the above example to accept port 25, I am still left with how to drop a flood/denial of service attack.
My question regards available hardware... an adapter taking a USB plug_ at end of a mic cable_ which adapter would then connect to the computer's standard audio/mic input.
Anybody seen such an adapter ? After looking an hour or so this morning on USB gadget sites, I found lots of the audio-mic-plug-TO-usb adapters, but this again is the opposite of what I need.
The problem Im having is with older versions of a sound app I use (audacity)_ newer versions of this specifically support USB mics_ but_ that feature is missing in older versions.
Assuming audacity will treat any legal connection via audio port as "mic"
I have a SSH server on Ubuntu 10.04 running behind a NAT. I have done the port-forwarding at the router. However say for example I want to restrict people connecting to the SSH server by country IP's. When I configure ufw with the following rule it still lets the IPs that are restricted through. Any idea why
sudo ufw allow from xxx.xxx.xxx.xxx/24 to any port 2556
I have a home server that I built recently and I have been looking into things I can make it do, and one idea that came up was software to manage incoming calls. The main thing I want is something that can block numbers, but it would also be nice if it could record calls or broadcast the caller id over my wireless network somehow. I've tried Googling around, but I really didn't find much.
I have 3 Dell r610 servers all running 10.04 and 1/3 can't connect to us.archive.ubuntu.com the other two are fine. I've tried swapping the cable from one of the other servers to the one with the issue, switching the IP address, restarting the networking module and nothing resolves the problem.
My IP has been blocked by Composite Blocking List for " IP Address 207 is listed in the CBL. It appears to be infected with a spam sending trojan or proxy. It was last detected at 2011-01-02 11:00 GMT (+/- 30 minutes), approximately 1 days, 3 hours, 29 minutes ago. It has been relisted following a previous removal at 2010-12-30 17:15 GMT (3 days, 21 hours, 2 minutes ago)"
How do I find this "trojan" and remove it???? I have a network of 6 computers right now, 5 are running Ubuntu (3 server and 2 Desktop versions) and one windows computer. I have run a virus scan in the windows computer and found nothing. How can I scan a linux computer for a virus?
I am trying to get two way serial communications going between a Windows XP system and a Linux system (RHEL 5).I have /sbin/agetty -L 9600 ttyS0
in /etc/inittab. I am using a generic USB to serial adaptor on Windows (Unitek) and a null modem cable. I have putty configured for 9600 baud, 8 bits, no parity, one stop bit, no flow control.I get the login prompt from agetty in the putty window but input does not work; I see weird characters in the putty screen. I can echo output into the device from windows and see it, but
cat < /dev/ttyS0. just prints out weird characters from what I type.
how I could file share, or make the whole Hard Drive (HDD) accessible to another computer. The two other computers I have are a Toshiba Laptop with Ethernet and USB, and a iMac Intel with Firewire, USB, and Ethernet. Putting these to use along with:
Three Ethernet Cables Two Printer Peripheral USB Cables The Two Computers A 2GB Flash Drive
That is all I can think of right now. I do not want to use CDs. In a way, I would like to do a network boot. So, how do I get the whole HDD visible to the others computers (either/both) and be able to write to it? I want to put Xubuntu on it, and earse the rest of the Hard Drive. The computers getting this are the iMac G3s and the eMac G4. The eMac has 256MB RAM, 40GB HDD, and a 700MHz processor. Two iMacs have 128MB RAM, 40GB HDD, and a 600MHz Processor. The other iMac is the same as the rest but has a 500MHz processor.
We have a new machine with RedHat enterprise 5 on it. I need to connect a serial cable to the serial port and talk to another system (old alpha system) instead of using a VT connected to the alpha.Does RedHat come with anything like Keaterm/hyperterm/etc etc?
I have a device that is working on modbus protocol andI have written a small program(with block TCP read method ) to read its registers via modbus protocol.my program is working very well but except those times that I unplug the Ethernet cable or turning off the modbus gateway during programs work.at this time my program stops on recv system call (if it reach this system call exacly when I unplug Ethernet cable or turning off the modbus gateway during programs work).I changed my source to work in nonblock TCP method, at this time with the same situation my program does not stop/block on recv system call but after pluging back the Ethernet cable or resuming the connectivity situation back it reads data incorrectly .this is my code:Quote:
I have a home server that I have been running for some years and am constantly tweaking / playing with it resulting in numerous reinstalls (and upsetting the wife!). It does nothing critical but I use it mainly for:
backing up my laptop files XBMC ZoneMinder
Due to the number of times that I manage to break it, I have now thought about setting it up as a base system but with virtual machines looking after the seperate 'components'. The machine is an AMD Athlon 64 X2 4200+ with 2Gb RAM. First of all do you think it is powerful enough to run XBMC and ZM in seperate virtual machines? - I appreciate the more RAM the better but at the moment I am sticking to 2Gb.
I was also wondering what sort of issues may arise for the audio and video areas I will be using. XBMC currently outputs through an HDMI cable to the TV and ZM recieves video signals through a seperate video card. ( I have had my concerns in the past that there have been conflicts in the way I have set things up!). I have read a number of guides about setting a system up with virtual machines but not really found any articles about the practicalities of using such a set up at home. before I commit and spend a week pulling my hair out trying to get it all to work!
Can Cat5e RJ45 connector crimper be used for Cat 6 connector because I heard cat 6 connector is different from cat 5e connector and also same question for cable tester can cat5e cable tester be used for cat 6 cable?
I can't get a certain harddrive out of its mounting (screws too tight) , but I want it connected to a different computer. Is it possible to have the harddrive's powercable connected to one computer, and its SATA cable connected to another computer's motherboard? (The powercable is too short to connect it to the other computer.)
I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused while nc -v -w2 -z localhost BBBB
I can seem to open port 25565 for a java application (executable jar) I'm running ubuntu server 9 thoroughly up to date code...
Yet connections to port 25565 fail when I have the firewall enabled (sudo ufw enable) For example canyouseeme.org says "Error: I could not see your service on port (25565) Reason: Connection timed out"
And connections to port 25565 _DO WORK_ when I disable the firewall (sudo ufw disable) canyouseeme.org says "Success: I can see your service on port (25565)"
I have an Ubuntu 11.04 server with lighttpd installed as my web server. It was working fine, but now when I restart it it gives me the following error...
"can't bind to port: 80 Address already in use"
Is there a way for me to find out what is using port 80 in it's place?
