General :: When To Do Port Redirection
Feb 10, 2010Under what condition port redirection could go useful?
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OpenSUSE Network :: Port Redirection - Multiple IP Addresses - Or Run On Port 80
Apr 7, 2011In SuSE firewall0. I do have a openSuse 11.4 and multiple IP addresses on eth0 interface
I run (trying to/have to) multiple TOMCAT servers.
I am trying to have each tomcat instance listen to on separate IP address for example:
What i am trying to do is to redirect
a) tomcat 1 -
a) tomcat 2 -
And so on.
I know that it has to be possible.
I do have just eth0/
Is is it possible. Do I have to create "vittual interfaces"? eth0:1, .......... and do redirection ?
"Server" has got just single interface - just 1 ethernet calbe goes to that server. I am planning to have 10-15 tomcat's on that server (I have to unfortunatley) and each has to run on port 80
Is it possible to "grant" permissions to normal users to run app on port 80 - that would solve me lots of problems if impossible to redirect.
I tried to setcap 'cap_net_bind_service=+ep' /path/to/tomcat ...... but no luck
Red Hat / Fedora :: Netcat / Port Redirection - When A Connection Is Received On A Port Say 123?
Apr 6, 2010i am running ncat (netcat's new version from nmap) on centos . I am listening on different ports. My question is , is it possible that when a connection is received on a port say 123, i redirect this connection to a different port and use the 123 port again for listening connections. ncat has an option -k which u can add with -l , it will force fully listen on the port. It can accept multiple connections on a single port but i want that once a client connects on to 123 port, he is forwarded to some other port and no longer on 123.
View 4 Replies View RelatedNetworking :: Allow A Port Redirection For Rdp Clients?
Jan 27, 2010Ok, here goes, I have a rdp server sitting at a remote store which is behind a router I do not control.
I might be able to get the phone company to add routing to it but at the moment I'd like to do this with ssh and reverse port routing, because I might need this for other ports later and I never know if the phone company wont break other routings already in place or just screw up the entire thing .
I am able to have a linux box at the site ssh into a server located where I'm at and reverse port forward port 3389 to that server. I can also then ssh into that server from my linux box and port forward 3389 to my box, under another port since my 3389 is already in use. Finally I can use rdesktop to rdp on the my local box which bounces it through the server and back to the linux box which forwards it to the rdp server (A Windows 2008 server to be exact). This is all well and good and works reasonably fast, but, I need to be able to have users on windows boxes at my site do this without all of the rigmarole. I need to, I guess, redirect a normal open port, or create one, on the server where I am so that it connects internally to the reverse forwarded port or open the internal port to the outside. So I guess I need to make it a 'gateway' for that one port, this way all I have to do is point the rdp clients at the main server and port to have it eventually connect to the rdp server in the remote store.
how to go about doing it. I guess I need an iptables entry forwarding the port but I'm not sure what is should be.
The other option is opening up the port 3389 to the outside but I'm not sure how to do that either. Right now I have no iptables entries at all but even if I turn off iptables completely port 3389 is not available if I try to use it from another pc on the network but I can rdp from the server itself using the 3389 port so I know it's working internally.
Networking :: Use Port Redirection Using Iptables?
Jun 17, 2010There is this server where in I want to use port redirection using iptables. For port redirection I have used nat table with PREROUTING chain and REDIRECT option. Like:
Code:
iptables -t nat -A PREROUTING -p tcp --dport pop3 -j REDIRECT --to-port 8110
It just does not work. I have tried to redirect other ports as well but nothing works.
[code]....
Networking :: Port Redirection In Same Machine
Mar 29, 2009I am using squid proxy server in my Linux machine for caching. Now i want run my squid in transparent mode not set proxy settings in browsers.Like squid is running port 3128. If we redirect the port 80 packets to port 3128, looping is occurred.How to avoid looping?
View 5 Replies View RelatedServer :: Apache Port Redirection?
Mar 25, 2011I'm running a server with Ubuntu 10.04 installed. I recently set up a VirtualHost (I'll call it my.website.com), like I have in the past without any problems. But this time, I'm stumped. When I connect to my.website.com, it should hit port 80, right? It doesn't; rather, it hits port 8000. I don't have any rewrites/redirections (I checked wherever possible) and checked apache2.conf (httpd.conf is empty).
View 5 Replies View RelatedNetworking :: Port Redirection To Internal Network NAS Box
Jan 17, 2011I'm have a base level understand of linux at this point. I have Debian box that I am trying to do some port redirection with.
I have my external NIC as eth0 with an IP of x.x.250.5.
I have my internal NIC as eth1 with an IP of 192.168.1.1.
On the internal network I have a NAS box with a web interface at 192.168.1.100. What I need is to set it up so that a request to x.x.250.5:8080 will some how forward/redirect to the internal network NAS box at 192.168.1.100:80.
General :: How To Stop Redirection To /dev/pts/x
Jul 10, 2010This is an examination senario. We have mulitple users logging into a RHEL-4 server using putty. These people are part of a same group. They are giving UNIX shell script exam.They are helping each other copy the code by using redirection to /dev/pts/x. Is there any way I can stop this redirection?
View 1 Replies View RelatedGeneral :: How To Using Redirection To Create A File
May 15, 2011I have a linux script that generates a string and prints it to the console. I want this string to be the name of a file and open it for editing in vi. How can this be done?
View 3 Replies View RelatedGeneral :: Using File Redirection Operators In Bash?
Sep 3, 2010What's the difference between using > and >>? How can I use both < and > (redirection operators) in a single command?
View 2 Replies View RelatedGeneral :: Rdesktop USB-redirection Save Removal?
May 16, 2011We have several HP Thin-Clients of type t5545 in use. We redirect USB-Media to the terminalserver. Because the t5545 runs a debian customized by hp, we can treat it like a debian in some way.First, I'll explain how usb-redirection is configured: automatically mount it to /tmp/tmpfs/media /tmp/tmpfs/media is redirected as disk "Z" via rdesktop-parameter -r disk:sharename=path in case of removed usb-media udev will run a script to umount -l the device and delete the mountpointThe environment:
Thin-Clients run linux: root@mac-addr:/tmp/tmpfs/media# uname -a
Linux mac-addr 2.6.26-2-686 1 SMP Wed Nov 4 20:45:37 UTC 2009 i686 GNU/Linux
Terminalserver runs Windows Server 2008 R2
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General :: Printf Calls - Cost Of I / O Redirection
Dec 16, 2010Some context: I'm calling some functions from within a C program and want to measure how long they take to execute. I've done this successfully, calling printf to print the results to the screen. This is reasonably fast. Ideally I'd like these to be dumped to a file, but fprintf presumably has some overhead since it writes to disk? Unless the data is buffered by the kernel and flushed later? What kind of delay can I expect before fprintf returns?
If I redirect the stdout to a file when I instantiate the binary as a process, will calls to printf also experience any overhead from redirection to a file? My aim here is to capture all data in a file, with the minimal amount of coding and effort, but with minimal impact in terms of time overheads for printf calls.
General :: File Descriptor Redirection And Duplication?
Mar 3, 2010i've checked the link, and it makes it better. but it doesn't include all the information. i'll continue searching the internet. However i have seen an example of creating a fd:
Code:
exec 5<&1
echo "TEST" >&5
exec 5>&-
as in the page, this was intended to redirect the stdout to the fd 5 and create it, and close it. i have the following questions:- what is exactly the meaning of second command? is it to redirect the command stdout "test" to the fd 5? and how i can see the contents of the fd 5? - in the first command, why the < is used instead if > and what is the difference between the below two commands as in the info bash *Redirection section It will be helpful if anyone could include a graph for file descriptor before and after different command execution.
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General :: Redirection Of Private Network Packets In The Gateway
Jul 25, 2011I have users using Windows XP, Windows 7, Linux (Fedora) and Mac. They all are in a single private network and all access internet through a Linux (RHEL5) system in which Squid acts as gateway. The same is true with my branch offices too except that private network is different and gateway system uses Fedora 9 instead of RHEL5. All the branch offices are connected through point to point leased lines with the head office for file transfer.
My requirement is this: I have a web server located at head office. Presently I am able to access this server from my branch offices through internet. I would like to access this server from branch offices through leased lines. This too I am able to access if I do routing in users system. The file transfer is taking place through one to one system at two ends by creating static routing in those systems.
General :: Redirection - Redirect The Output Of A Program To The Diff Command?
Jan 13, 2011I have a program that writes to stdout. Is there a way that I can redirect the output to the linux diff command or do I have to write the output to a file and then compare that. For example I have a bunch of test input files for a program and the corresponding expected output in another set of files. And I'd like to do something like ./program < t1.input | diff t1.expected.
View 3 Replies View RelatedGeneral :: File Output Redirection - Redirect Stream To Multiple Files?
Dec 7, 2010I'm working on some scheduled task script files to keep nightly backups of some of our database information in place, and it's a bit annoying when they blow up. I know how to redirect stdout and stderr to a flat file I can view when I come in, and I know that 2>&1 maps them both to the same file (whatever was named in 1). However, I'm running into some cron-time situations where it's easier to have the two streams together, and other cron-time situations where it's easier to have them separated. I can't really tell which is going to happen; is there some way I could create both kinds of output file for my scripts, so that I've got a std_err only file and an interleaved std_out/std_err file?
Note: I've looked at the 'tee' command, but I don't think it will work for what I'm after. 'tee' appears to only work with stdout; I'm trying to work with stderr.
General :: SFTP Server Port Blocked On Uni Network / Need To Change Listening Port
Oct 21, 2010VERY new to linux, erm but I have an issue that needs solving!I recently moved to university, where their network blocks sftp port 22, this means that I cannot connect to my FTP server which is running a version of linux.Now I've got this ftp server connected to a seedbox and it was created using the following walk through..Code:I have written this guide for a friend, but I though it would be useful for others as well.
There are several guides floating around, but I found that most always cock up in some way. This one is tried and tested to work on Debian Etch (on an OVH rps, but should apply to most servers).If there is a new stable release of rtorrent/libtorrent then I will update this guide to show you how to update it (without reinstalling the whole server).
At the bottom there are also instructions to install ftp access & some network monitoring software.Basically, I would really like someone to be able to construct the commands on how to change the listen port for sftp connection on linux or add another port to the list that Linux would use so that I could put in through putty.
General :: Warning: Remote Port Forwarding Failed For Listen Port 7869
Jul 20, 2010I tried to make "ssh tunneling", but failed and got this message.
Quote:
Administrator@windstory-PC /
$ ssh -R 7869:localhost:7869 windowsstudy@192.168.0.4
windowsstudy@192.168.0.4's password:
Warning: remote port forwarding failed for listen port 7869 Last login: Wed Jul 21 01:56:04 2010 from 192.168.0.2 -bash-3.2$
1. system environment
192.168.0.2 - windows 7 + copssh
192.168.0.4 - centos 5.4 x86 + openssh
2. Guide for setting "ssh tunneling"
[URL]
3. Added this to sshd.conf
Quote:
AllowTcpForwarding yes
4. "netstat -na|grep 7869" at 192.168.0.4
Quote:
[root:maestro:~]# netstat -na|grep 7869
tcp 0 0 0.0.0.0:7869 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:7869 127.0.0.1:53539 ESTABLISHED
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5. result of "ssh -vvv -R 7869:localhost:7869 windowsstudy@192.168.0.4"
Quote:
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
[code]....
6. I added 7869 for telnet service as follow;
Quote:
mytelnet 7869/tcp # My Telnet server
Fedora Networking :: Port Redirect, I.e. Whatever Comes Through Whatever Interface On Port AAAA Will Get Redirected To Port BBBB?
Feb 18, 2010I 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
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General :: Redirection Rules For "redirect URL" Identifier?
Jan 20, 2010I need to redirect h[URL]But when it gets [URL]eans it's not redirecting with identifier "redirectUrl=".How to rewrite to that as well
View 1 Replies View RelatedServer :: Postfix Port - Send Message Via Port 587 Not Port 25
May 2, 2010I have a mail server i need it to send message via port 587 not port 25, i make some changes to my postfix server which i use and it is already successed making a telnet to 587 port like it :
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Server :: URL Rewriting Without Redirection?
Apr 28, 2011I got a peculiar request at work, and maybe you folks can help me out.I want to rewrite URL 'foo.com' as 'bar.com' (in the browser address bar) still display the content of 'foo.com'
View 2 Replies View RelatedProgramming :: Redirection From A File To Command?
Apr 18, 2011I am always confused about the redirection operator <Lets say i have a file input.txt that contains one word "hello" without the quotes when i do the following why don't i see any output? $echo < input.txt Secondly, i am slightly confused between input redirection < and pipe | operator. Sometimes they seem to do the same thing. For example i can achieve the output from the above command as follows $ cat input.txt | xargs echo
View 2 Replies View RelatedNetworking :: Using Iptables Dnat For Redirection?
Oct 18, 2010I have been trying to achieve something through iptables but something is going wrong. I want connection/packets arriving to a specific computer (let's call it "server") from another specific computer ("client") inside the same network to be automatically redirected to a remote computer in the internet and vice-versa. I tried doing that using iptables with these commands on the "server" PC:
Code:
iptables -t nat -A PREROUTING --source 'client-ip' -j DNAT --to-destination 'remote-pc-ip'
iptables -t nat -A PREROUTING --source 'remote-pc-ip' -j DNAT --to-destination 'client-ip'
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Server :: Apache Redirection Based On IP?
Feb 25, 2011I'm in a bit dilemma on how to set IP based forwarding to specific URL. I have internal staff from 207.173.4.xxx going to www.domain.com. I would like to forward them to www2.domain.com when they are offsite and working remotely from different IP address range. Is there way to achieve this with Apache? If not, is there a software solution to achieve this effect?
View 6 Replies View RelatedServer :: Redirection With Different Folders Over Apache2
Nov 6, 2010I have a problem about redirection over Apache2 over Debian Lenny. We have build a LAMP, and our programmer make a software with these features:
When you put on your browser (i.e.) [URL], you access to the program in /var/www/vhosts/hugohome/inside. And when you put [URL] you access to the program in /var/www/vhosts/hugohome/outside. Today, if you just put [URL] our Apache answers 403 (forbidden), because we had blocked folder access. (You know....isn't the right way). Our Apache's Document Root is in /var/www/vhosts/hugohome.
Our goal is to change definitely [URL] to access -> /var/www/vhosts/hugohome/inside. This is our main intention. Also, we can continue with [URL] pointing to /var/www/vhosts/hugohome/outside. I thought, hmm easy!: I can change the DocumentRoot to /var/www/vhosts/hugohome/inside and try with an Alias to outside. But the problem is that the programmer has taken the software reference with /var/www/vhosts/hugohome and when I tried to change the Document Root the programs didn't work fine (loops, error 404, etc).
How can I do?. I have tried with Apache with many manners, but I just have a relative success with: "RedirectMatch ^/$ [URL]". It works, but the Browser shows the ugly [URL]. Our intention is just show [URL]. Unfortunately we can't work directly with the DNS servers, and I guess that I can resolve with (i.e.) Apache and Bind together.
Software :: Sendmail: Email Redirection
Jan 31, 2010I have a test application that sends out email. It's configured to send it through the sendmail installed on the local machine (distro: RedHat 4.8; sendmail version 8.13.1). The email addresses are external to the machine. I would like to stop most of those emails. I can't use the /etc/aliases file, because that methodology only works for operating system addresses/userid's on the local machine.
I'd like to block certain addresses from getting emailed out, so that users don't get spam from a test server that's been "cloned" from a production server. On the other hand, I don't want to turn off email altogether. I'm pretty sure that if I installed SpamAssassin I'd probably be able to rewrite certain addresses. But SpamAssassin is bloatware for what I want to do. If native sendmail is not able to filter out from sending certain emails based on the "To: " header (in the envelope) is there an app that uses sendmail's milter API that will? I've been away from heavy use of sendmail for awhile, so it had been awhile that I'd been on comp.mail.sendmail, but I notice that traffic is a fraction of what it used to be.
Software :: URL Redirection Or Reverse Proxy?
Dec 27, 2010I have a web application running on port 8060 and requires a sub directory on the end (:8060/fisheye/). I also have apache running on port 80 and would like to redirect it to [URL].
Code:
RedirectMatch ^/$ [URL] but the port number is visible, how can I hide it?
Ubuntu :: Netcat Output Pipes And Redirection ?
May 25, 2010I'm trying to redirect nc command output but I can't do it.
I have tried this:
And this:
But it seems doesn't work.