Stop Outbound Spam On An Open Wireless Network
Jan 31, 2008
I'm not sure if this is the right place to be posting this, but at our hotel, we have wireless routers (Linksys) that any of our clients can use to connect their laptops to the internet. We have been getting reports from our ISP that spam has been coming from our external IP address, so I wanted to know what people would recommend as ways to combat either our computers or any of our clients' computers from sending out spam. The internet is connected through a firewall/server computer running linux. I thought about blocking port 25, but I'm sure we would have clients complaining about not being able to send any mail.
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Sep 3, 2014
Over the last two weeks several individuals in different parts of the USA have noted extra characters in some web pages when on the att network.
The same server is sending out the same sites fine, when viewed on all other internet providers we have tested. We have also tested multiple browsers. Interestingly, if you use the secure layer - https, the site is fine, no extra characters.
Can any settings or anything on the server hosting software, etc, precipitate or stop this?
Read more at [URL]...
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Jul 9, 2007
I tried a little searching both in Google and on here but this is probably going to be a private or member-based thing anyway.
I've gotten a couple comments that some of my outbound personal mail is ending up in spam folders. I think it's almost completely limited to having Outlook (or Express?) as a client... which I assume doesn't even do network-based lookups. Nonetheless I don't seem to be on any blacklists, and running it through my own spamassassin filter comes up basically zero score. But the fact that more than one person has had the problem concerns me greatly. Also, I haven't seen any significant reason why the content itself would trigger anything.
I realize a public spam test service would basically be a "testing ground" for spammers to evade detection, but there's obviously legitimate uses as well... is there such a tool somewhere? Thanks for any advice. Public information sharing is key to a forum, but PMs are welcome in this case.
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Apr 17, 2009
I have a server that is sending spam, but I can not know who sent because the server not has installed suphp.
There is another option to see who sends spam?
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Oct 19, 2007
For my site email address I get like 500 emails a day.
Is spam assassin really the only method?
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Aug 13, 2007
i have server and on the server 150 website and more
someone upload mailer and send spam to online banking
i want know where this mailer on the server coz my server on nobody
i stoped sending from nobody from Tweak Settings till know what the account sent that and all message in Mail Queue Manager
what the solution?
any script to know that or method?
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May 14, 2008
We have WHM 11 on the server.
Now the server is getting to many spam mails. We already have filters on the server, but we get spam mails with header which are not in English language. The header are normally in russian or arabic language.
how to stop these spam mails with header which are not in english.
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May 15, 2008
I have been receiving a LOT more "unusual character" spam, where the entire email consists of something like this: .....
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Mar 2, 2007
Can you share your mod_security rules to stop outgoing spam? (most generated by php contact forms)
And for incoming?
I would like to know what rules can work with mod_security 1.9.4.
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Jan 17, 2008
I check and see many email was sent from my domain but i dont do it, how to stop this problem ?
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Dec 25, 2007
I have a VPS and I am wondering if anyone knows any way in which to make it so that emails sent from the server are not seen as spam by hotmail and the likes.
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Oct 25, 2007
i have one server with cPanel/WHM use Exim mail server, how to stop receved SPAM from domain inews.inf.br, i receved many SPAMs from this domain.
OS: CentOS
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Nov 5, 2007
Stop spam at smtp level.It's great with a lot of features, easy to install.
www.spamdyke.org
Stop spam now
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Dec 4, 2008
Does anybody know of any open source Anti Spam gateway for mail servers? I have used MailCleaner and know how it works. Is there any other available?
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Nov 11, 2008
Any idea? Or any program can prevent it?
(CentOS 5.2 Linux running on servers)
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Feb 20, 2008
I want to set up a dedicated server for spam and virus filtering (MX)
But i was wondering, is there a good opensource based tool for this?
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Mar 5, 2007
I was trying to install mailscanner on a cpanel box using chirpy's script [url], followed every step, until this:
Code:
[root@server.yourbox.com:~]perl mscpanel.pl -i
Unable to open spam.scanning.rules for reading: file or directory doesnt exist at mscpanel.pl line 115.
On the 115 line i found this:
Code:
open (IN, "</usr/mailscanner/etc/rules/spam.scanning.rules") or die "Unable to open spam.scanning.rules for reading: $!";
The file /usr/mailscanner/etc/rules/spam.scanning.rules just doesnt exists... maybe chirpy's script is not working well installing everything its needed..
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May 15, 2008
I've been getting a lot of "Undeliverable" emails sent to my email address. On these messages, the spammer is using my email on the "From" part of the email...... So whenever he sends out spam, the person(s) getting spammed think it's from me..... And the thousands of Undeliverable email error messages are also sent to me.
Is there a way to stop this from Happening? ....... Besides changing my email address?
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Oct 22, 2009
I hate to ask this, because I bet it's been asked many times before, but I want to start a little class teaching web development at a local night school and I wanted to set up a LAN using my laptop, CentOS, and a wireless router.
The idea is to have the students develop their pages and download files and get used to the idea of what a server is.
I see about ten students sitting in a room, popping open their laptops, logging onto the network, and then pointing their browsers to a certain IP address which would be the home page for the class.
If this is possible, can anybody point me in the right direction to teach myself how to do it?
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May 12, 2008
I'm doing a project for my school ( a small technical college) and we're trying to come up with some sort of wireless authentication gateway. This doesn't need to be locked down and super secure, this is a state run school with an open wifi network. Basically we want all wireless users to be forced to view a splash page/AUP and agree to it before being able to access the web.
couple issues:
-Super low budget, so enterprise solutions are pretty much out of the question
-must be as transparent as possible to the use: no MAC registering with the IT dept. no added software, no RADIUS certs etc.
-we have limited access to the actual router and all administration but be done by the upstream provider(including inter-vlan routing)
I've looked at NoCAT and really like it but because of the existing network topology its going to be hard to force all traffic through a central box for filtering/auth
What I'm wondering is if there is a way to do selective DNS poisoning to redirect all lookups to a web authentication server(similar to nocat's system). After a host is authenticated their DNS would resolve correctly. I know someone could just go out by IP or potentially use different DNS servers but we really aren't that concerned about it, all they have to do is click 'accept' anyway.
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Jun 12, 2007
I have not been able to connect to my server via browser, ftp or email since my server had a OS reload & security package installed.
If I disconnect and remove my wireless router I can access the server directly from the modem. When the Linksys WRT54G is connected I can go anywhere on the net with no problems, except my server.
Is there something they might have done at the server to block wireless router access?
I get a timed out message when I ping any of the IP's on the server with the wireless router connected.
Linksys has been of no help and I have talked with Clearwire who owns my modem.
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May 27, 2007
Anyone have recommendations / references for Mexico / Latin America wireless ISPs and coverage areas?
IP satellite coverage?
Also looking for recommendations for Mexico / Latin America data centers (something like half rack, 20 amps, reliable, redundant, etc)
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May 4, 2008
I have been searching for a solution to a problem that shouldn't exist but it does.
Background:
I have a customer on a UK server who sends emails to 500+ recipients on a monthly basis, and all but 3 emails are delivered....
The 3 that don't go, bounce after 3 days (as per the exim setup)
The 3 recipient domain's that reject don't seem to accept email from UK/European ip's and I have tried to send them emails from 4 different networks and still they bounce.
I have even tried to contact them via gmail, and still not heard back.
Proposed solution:
I want to be able to send email for that 1 domain to a Postfix Relay I have in the US.
Question:
How do I achieve this within Exim (a Cpanel Server).
I have found that so far its to do with the Router Configuration section within the Cpanel Exim setup, but I cannot seem to find an example of what and where i need to change the config...
Can anyone provide an example?
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Jul 20, 2009
A prospect wants an email server that could allow him to restrict some accounts and make them send emails only to the companies domain.
I was thinking of setting up a VPS with smartermail, so I was wondering if this be done with smartermail?
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Mar 29, 2009
Could you guys look and see if what I am seeing is right? They offer Global Crossing and Cogent officially. So if I use GLBX looking glass, I get this.
Trying trace from node 'Miami, FL, US' to '96.31.73.xxx'
1 64.214.16.65 (64.214.16.65) 0.761 ms 0.608 ms
2 so0-0-0-2488M.ar2.TPA1.gblx.net (67.17.66.165) 5.690 ms 5.695 ms
3 WBS-CONNECT-LLC.ae0.409.ar2.TPA1.gblx.net (64.214.147.222) 5.731 ms 5.880 ms
4 69.46.31.106 (69.46.31.106) 7.442 ms 6.667 ms
5 node1.sarorahosting.com (96.31.73.2) 15.734 ms 15.993 ms
6 96.31.73.xxx (96.31.73.xxx) 15.861 ms 15.795 ms
Now if I tracert from the VPS to the GLBX router, I get this.
traceroute to 64.214.16.65 (64.214.16.65), 30 hops max, 40 byte packets
1 node1.sarorahosting.com (96.31.73.2) 0.072 ms 0.035 ms 0.008 ms
2 69.46.31.105 (69.46.31.105) 0.731 ms 0.863 ms 1.003 ms
3 gi0-6.na21.b001841-0.tpa01.atlas.cogentco.com (38.99.204.33) 1.147 ms 1.142 ms 1.428 ms
4 gi4-1.core01.tpa01.atlas.cogentco.com (38.20.33.89) 0.818 ms 0.814 ms 0.807 ms
5 po2-0.core01.mco01.atlas.cogentco.com (154.54.27.90) 148.004 ms * *
6 po5-0.core01.jax01.atlas.cogentco.com (66.28.4.146) 5.847 ms 5.839 ms 5.872 ms
7 po5-0.core01.atl01.atlas.cogentco.com (154.54.3.197) 11.953 ms 23.819 ms 23.870 ms
8 te3-3.ccr01.atl01.atlas.cogentco.com (154.54.5.38) 11.721 ms 11.752 ms 11.787 ms
9 te8-2.mpd01.atl04.atlas.cogentco.com (154.54.3.174) 11.962 ms 11.921 ms 11.987 ms
10 ge4-1-0-390-1000M.ar4.ATL1.gblx.net (64.208.110.97) 12.252 ms 12.359 ms 12.444 ms
11 64.214.16.65 (64.214.16.65) 16.026 ms 16.061 ms 16.594 ms
Now what would be causing this to happen?
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