Questions tagged [blackhole]
12 questions
10
votes
4 answers
A way for DNS record to say "this domain has no mail server"?
What is the appropriate way to set up a DNS record that says "this domain has no mail server"?
I assume I need a special MX record to do this, otherwise it will be assumed that the A record is the answer.
I ask this question because it seems like it…
700 Software
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8
votes
3 answers
Should I let email bounce or send it to a blackhole?
I have a lot of unused (old, dead) accounts on my machine. Many of them receive literally thousands of emails a day, all spam.
If the account was used by a person, I let the email bounce so that anyone trying to contact them knows something is…
TomOnTime
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5
votes
2 answers
Blackhole route private intranet traffic
I have a private network with a handful of Linux routers all route sharing via OSPF. How do I blackhole private network ranges that I don't have routes for?
In other words, I want to be sure I NEVER route 10.0.0.0/8, 172.16.0.0/12 or 192.168.0.0/24…
tMC
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4
votes
4 answers
Providing DNS redirection to honeypot server for known bad domains
Currently running BIND on RHEL 5.4 and am looking for a more efficient manner of providing DNS redirection to a honeypot server for a large (30,000+) list of forbidden domains.
Our current solution for this requirement is to include a file…
syn-
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3
votes
3 answers
Black Hole DNS on Windows DNS Server
I am looking at configuring our Windows DNS Servers for some type of DNS based blackhole operation. Ideally, we would be able to use feeds from MalwareDomains.com or the like. I was curious how one could go about setting up and implementing such a…
John
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2
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1 answer
Why might POSTing cause a blackhole?
I'm developing an app using CakePHP and have encountered a strange problem: When I POST data to a particular method I get a 0 byte response and a simple 404 error in the access log.
psycho953.psych.susx.ac.uk - - [11/Oct/2011:10:17:43 +0100] "GET…
Tom Wright
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vote
4 answers
Does it matter if your web server's IP is RBL'ed?
We have a web server (on Slicehost) with an IP address that has been blacklisted in at least one DNSRBL (FIVETEN).
The host is not currently a source of mail, in fact all mail for the domain goes through Google apps. The only association between the…
Ross M Karchner
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1
vote
1 answer
Webserver Responses Hanging
From some networks requesting certain images on our webserver is very flakey. I've looked at tcpdumps on both sides and the server sends back part of the file and the client ACKs the TCP packet but the server never receives the ACK.
The servers…
benmmurphy
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vote
2 answers
Apache VirtualHost Blockhole (Eats All Requests on All Ports on an IP)
I’m exhausted. I just spent the last two hours chasing a goose that I have been after on-and-off for the past year. Here is the goal, put as succinctly as possible.
Step 1: HOSTS File:
127.0.0.5 NastyAdServer.com
127.0.0.5 xssServer.com
127.0.0.5…
Synetech
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0
votes
3 answers
Is there any difference between prisoner.iana.org, blackhole-1.iana.org, and blackhole-2.iana.org?
Probably not the most useful question, but I'm curious:
I understand (in theory) that if a reverse lookup for a private IP makes it makes it past your own DNS servers you should get back "prisoner.iana.org" "blackhole-1.iana.org" or…
username
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0
votes
1 answer
Exim: silently drop messages to given recipients?
I have an old legacy php application that used to send out a log of debug mails on each aspect of its work. Due to fact that noone care to turn off this feature and also dut to fact that one day we may need these mailing to be send out again I…
Alexander
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1 answer
How to setup :fail: default email address in cPanel?
How to setup a :fail: default email address in cPanel?
darkAsPitch
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