Linux Advanced Networking: Forwarding / Cloning UDP Traffic
May 8, 2009
I am trying to find an application that can listen on a given UDP port, say "6271" and forward all traffic (UDP) sent to that port to another IP (not on the same subnet).
I should not call this forwarding, but instead, cloning (because forwarding usually is only on the same subnet or vlan). The packets should not be modified, (thus IP information in packet ect.)
Is this possible? I have tried some applications such as,
samplicator
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Nov 11, 2014
I have two sites that register a high amount to SMTP traffic. Both sited have only forwarding email addresses.
Do forwarding addresses accumulate SMTP traffic on the log?
Also, if a forwarding email is created without a mailbox is it necessary to add a password so that "others" cannot use the blank SMTP server to send email out?
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Dec 30, 2014
When copy a database, plesk would copy it but hung at creating the db user, therefore, the database cloning message keeps on showing
Cloning the database xxxxxx to the database xxxxx. You will be notified of the progress by email (xxxxxxx).
*I checked if the database was copied, it showed it did but the user was not created for that newly copied one.
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Oct 29, 2009
We have discussed all the basic methods of securing and hardening the server. Lets leave all the basic and general server securing and hardening I have started this to get advance knowledge in securing and hardening of the server so that it will usefull for all the person So i request all to provide all the vaulable tips and suggestions in advance securing and hardening of linux servers I welcome all the comments related to advance securing and hardening of linux servers.
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Sep 19, 2014
You can edit the nginx directives for the desired vhost at the webserver config. However, it seems like that you can only add basic directives, but not something like that:
Code:
http {
# memcached servers
upstream memcached-servers {
server 127.0.0.1:11211;
}
[Code] ....
How can I do that?
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Jul 23, 2007
I have windows and linux both are connected through dlink switch, but these are not communicating. How can I setup the network to communicate each other? I have linux box with samba. I am not sure how exactly I need to setup the network.
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Nov 8, 2007
We seem to be doing a lot of this lately with clients upgrading to larger hard drives, etc.
I'm curious as to what works best for most folks that do have physical access to their servers when copying drives in servers, like when upgrading to larger hard drives or replacing a hard drive.
I know there are "hardware" drive copiers, but what about software methods?
Especially when upgrading both hard drives in a dual hard drive server.
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May 13, 2014
OS: CentOS 6.5 (Final)
Panel version: 11.0.9
I can receive email and check them via Horde but i'm unable to get them forwarded to my gmail account.Is there anything i can check/do ?I'm an ex-cpanel user.
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Jun 14, 2014
I have re-built a website on a new domain. Now I want to redirect http://www.olddomain.com/anything or http://olddomain.anything to www.newdomain. Because the file structure is totally different, I want all redirections to go to the Home Page of newdomain.
Initially, I used Standard forwarding in the Plesk CP but that attempts to keep the filename the same. So www.olddomain.com/wibble tries to go to www.newdomain.com/wibble. But wibble dies not exist on the new domain.
Should I use htaccess with physical hosting instead on olddomain.com? Is the following correct?:
Code:
Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^olddomain.com [NC]
RewriteRule ^(.*)$ http://www.newdomain.com [R=301,L]
Will that basically cover any request? Anything that people have saved or which appears in Google searches, no matter whether http:// or http://www.
And for neatness on the new domain, I would like to add www to any request like http://newdomain.com/whatever to go to http://www.newdomain.com/whatever which I think means that Google analytics will report more accurately.
So would my htaccess file on newdomain.com be like this?:
Code:
Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^newdomain.com [NC]
RewriteRule ^(.*)$ http://www.newdomain.com/$1 [R=301,L]
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Oct 28, 2007
I've setup my ssh to login with keys and passphrase. I would like to do away with passphrases by using agent forwarding. Putty uses Pageant to store private keys, bu from all the tutorials I can find, it's a windows based feature (to add private keys). I've also tried to use ssh-add (a different agent), but it has trouble recognizing my private key passphrase (made with putty). I know the private key is working because I'm able to use use ssh without a password, just the phrase.
What's the best way to do this? Is there a putty pageant command line that I don't know about?
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Feb 21, 2015
I setup an email account into my Plesk 12 to automatic forwarding all emails to an gmail address. But Gmail put all mails received into the Spam folder.
I revised the mail Header and its a SPF softfail causes because my server is not rewritting the sender envelope.
How can I activate SRS on my Plesk
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Sep 16, 2014
I update my plesk 11,5 to 12.And I activate (limit control for smtp)After this action the email forwarding fails in all domains of plesk.This is the mail system at host fsyc.org. You can delete your own text from the attached returned message.
Reporting-MTA: dns; fsyc.org
X-Postfix-Queue-ID: 5B51E2E800BC
X-Postfix-Sender: rfc822; rbuila@robertobuil.com
Arrival-Date: Tue, 16 Sep 2014 14:21:10 +0200 (CEST)
[code].....
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Apr 23, 2015
I want to add a subdomain foo.bar.com to a master domain bar.com in the subscription bar.com. Normally this works but if I set the hosting type of the master domain to forward, I cannot add subdomains anymore. If I have already added a subdomain, I cannot change the hosting type of the master domain. Also it is not possible to add a second domain to the subscription anymore.
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Aug 23, 2014
Many of our clients create e-mail accounts that forward incoming e-mail to mailboxes hosted on other e-mail services. e.g., Gmail.
Lately, though, a handful of these accounts have been receiving a lot of spam (i.e., UCE) and that's been causing a lot of damage to our reputation with these other e-mail services because the message that's being forwarded appears to have originated from our servers.
Code:
<someuser@gmail.com>: host gmail-smtp-in.l.google.com[64.233.183.27]
said: 552-5.7.0 This message was blocked because its content presents a
potential 552-5.7.0 security issue. Please visit 552-5.7.0
http://support.google.com/mail/bin/answer.py?answer=6590 to review our 552
5.7.0 message content and attachment content guidelines.
g20si28780491ici.46 - gsmtp (in reply to end of DATA command)
Is there some way to...
Find accounts that are configured to forward to gmail?
Disable forwarding in accounts that are configured to forward to gmail?
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Dec 6, 2014
I have installed Plesk 12.0.18 on my server and want to change the hosting-type from "Forwarding" to "Web hosting". I change the type via "Websites & Domains" view (see attachments).
After I insert username and password, I get following error message:
Some fields are empty or contain an improper value. ('home' = '')
Deleting the domain and creating it from scratch is a bad option. I would have to create all e-mail accounts and migrate the data.
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Jun 30, 2008
I had email forwarding from a site that I am running on a DirectAdmin host and its not working now.
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Apr 29, 2015
URL....We are running Plesk 12 on a Linux VPS where we have multiple domains running.Multiple of these domains should redirect from www. domain name. ext to https://ext.domainname.com.This is configured with the Domain forwarding in Plesk, with hosting type Forwarding.But as described in the 2 links provided above, whenever you go to https://www.domain.ext, it does not redirect, and actually shows a Security error, since the domain doesn't have the SSL-certificate installed (because it should redirect to the https://ext.domainname.com).
Clearly we don't want visitors on the website to receive the (incorrect) Security error, and we want all traffic to http(s)://www.domain.ext to be redirected to the appropriate subdomains. allows us to redirect both the https/http connections to the domains, without forcing us to have the domains have a Website hosting add redirect them manually with (for example) .htaccess.
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Apr 9, 2013
I have mail-addresses with mailbox turned OFF and Forwarding switched ON.
The user can receive emails but can't use SMTP to send email. I expect that users without mailboxes can send messages, like in Plesk 9.5.
Error: No such user 'info@example.com' in mail authorization database
CentOS 6.4 + Plesk 11.0.9 Update #45
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Apr 17, 2008
Is there a way to use traffic shaping in Linux? Like limit traffic to certain port, set priorities etc. Like ex: I'd want to set FTP to use max of 1mbps, http max of 80mbps, and set total to 90mbps.
Also is there ways to setup dos protection within linux? What I'd basically want is if it detects a dos, it either turns off the server, or does some other action that would cut it off either until I take action or for a set amount of time. Think turning off would be only solution since if I just drop packets I'd still be paying for that traffic.
Basically I want to ensure that if I get a DoS I'm not stuck paying insane bandwidth overcharges. I rather have a few days of downtime to deal with, then a few thousand dollars to pay and me having to declare bankruptcy and sell property etc...
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Jan 15, 2015
Is there a way to see what domain is getting hit when I have a huge traffic spike? Not the daily report, but in real time? Like when it is happening?
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Jul 11, 2007
I know how to use basic URL rewriting, but I'd like to redirect URLs like this:
[url]
to this:
[url]
Is that possible to do this with Apache mod_rewrite?
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Feb 24, 2007
People have been abusing my web proxy servers to send SPAM emails. I use PHProxy and I have no mail ports open on my server, or any mail scripts. My network is http://privax.us
Examples of emails (I have listed some notes):
My IP: 75.126.48.148
[url]
Received: from mail.anpmall.net ([75.126.48.148]) by mail.anpmall.net with HTTP (Code-Crafters Ability Mail Server 2.55); - Hmm?
----------------------------------------
My IP: 75.126.48.148
[url]
----------------------------------------
My IP: 75.126.48.146
[url]
Received: from 216.154.195.49 ([172.18.12.134]) by vms047.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 - hmm Java?
----------------------------------------
My IP: 75.126.48.148
[url]
I found in logs access to webmail.bellsouth.net at the time of the spamming, so I have blocked use of bellsouth.net on my proxy and banned the IP's. See
[url]
----------------------------------------
These are just some of the spam reports I have, and this is really doing my head in. As mentioned my servers do not have mail ports or mail scripts on them. They use webmin (stripped features) for a control panel.
I really need to find out why my IP is always at the bottom of this. I have asked in this forum before but did not have much luck. I have also contacted security companies to help but they were not sure what is happening.
One theory is the spammers use web based email systems, and when they submit the form the IP (from a PHP POST variable) is my IP because they are running under my proxy. But I have always assumed that if you have an email form and submit it, the server hosting the forms IP gets sent, not the actual persons IP.
That is one theory, but at the end of the day I'm still clueless to how to block this. I have blocked the use of bellsouth.net on my servers but a lot of the spam is coming from anpmall.net as mentioned above.
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May 31, 2008
We just ordered a new Dell server and trying to decide which flavor of Linux to use. The server is going to be used exclusively for a MySQL 5 database.
The MySQL database is very large about 9 gigs, (GIS data), and will be hit quite hard.
I was looking at CentOS and Fedora.
Here is the server specs:
2 Intel Quad Core Xeon 5410 2.33GHZ
8 Gigs Ram
2 146GB 15000RPM SAS Drives In Raid 1
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Aug 16, 2013
Our Server doesn't show the Traffic History under "Tools & Settings -> Summary Report -> View Traffic History", but for every Domain it runs.
We Migrate this Server from a Dedicated to an OpenVZ Server - on another Server with OpenVZ its running without Problems, but this one we don't migrate.
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Nov 15, 2007
What traffic monitor would everyone recommend for sites that have as many as 5,000 to 10,000 hits an hour?
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Dec 25, 2014
Today I try to fit all FW rules to my need. After i blocked the traffic "allow other incoming traffic" in the Plesk FW i dont get folders listed via FTP. The FTP client connect to my server, but listing content times out. After allow other traffic the content get listed. The rule "Allow FTP connections" ist in all enabled all the time.
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Nov 27, 2007
I have a Windows 2000 Advanced Server where there's a performance issue with some of the .asp pages that retrieve data from Access databases, (I know Access databases aren't ideal for data). These pages will just get stuck/freeze, and then either suddenly spring back to life, or give a script timeout error 0113.
The largest Access database I've seen is 136MB (is that way too large?)
I will probably move some of the large Access databases onto a different server but before I do:
- Are there any tools you can recommend to diagnose exactly what files / databases are causing the problem. I don't think the Win 2000 performance monitor tools even work.
- Can anyone explain more about the technicalities behind this issue. I expect it has something to do with processes, threads, memory, Access drivers being loaded into memory etc etc. Can anyone tell me what they know to put me in the picture better?
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Mar 23, 2007
I'm trying to delete the IP addresses in the nameserver registration but when I follow the instructions by clearing each input box and then clicking save I get these errors:
ns1.domain.com Error: Nameserver registration failed due to error 533: Object association prohibits operation
ns2.domain.com Error: Nameserver registration failed due to error 533: Object association prohibits operation
Ive contacted namecheap but I still havent heard back from them. Anyone know whats going on? I cant seem to delete these.
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