Spoofing is an activity when a person or program try to impersonates itself as another.

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701 views

What's the best way to block IP spoofing on a layer 3 switch?

We're hosting Dedicated Servers and are currently using old 3com switches with IP-based ACLs. So each port has an ACL that allows all IP addresses assigned to this customer, and blocks everything ...
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1answer
764 views

Using arpwatch to backtrack proxy access ip to eap-tls certificate

In my network I am using eap-tls authentication (machine certificates) for clients. Those clients are using a squid proxy to access the internet. The proxy is logging the request to the access.log. ...
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2answers
210 views

MAC spoofing - keeping the connection alive

Is it possible to keep a connection alive, while spoofing/changing the MAC address of your own network adapter (especially wlan adapter), without needing to re-authenticate against 802.1X ...
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3answers
2k views

Stop spoof emails in Google Apps

Desperately need some help here. I've been using Google Apps for my domain (2qubed.co.uk) for over 2 years now with no problems at all until recently. For the past few months I have been getting lots ...
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3answers
5k views

How to prevent ip spoofing within iptables?

My Apache web-server on Linux is being flooded by massive requests for a non-existent file. The immediate impact is the rapid growth of the access & error log. I already took care of this by not ...
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3answers
96 views

How to scan for which ports would be open to another location

I'm just assessing the security of my home server in preparation for opening it up to the internet. I've used nmap from a machine on my local network but I have firewall rules allowing access from the ...
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1answer
422 views

How to avoid sendmail relay domains spoofing

I have a bunch of domains as relay domains at my sendmail config, i noticed that some dirty botnet is using dns spoof to be able to send emails using those relay domains. How it works: a domain ...
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4answers
757 views

MAC address spoofing - why doesn't this work?

So I'm in a new job, and they're pretty draconian about their network, hardware, and OS security. :-( I'm a web developer, but am forced to use IE7 for development simply because they don't want ...
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1answer
168 views

Preventing Email Spoofing

I use Google Apps with my domain. Recently, we have begun to receive spam that gets past Google's spam filters. They are from our own email addresses. I am wondering how to prevent this kind of ...
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1answer
3k views

ISA Server dropping packets as it believes they are spoofed

We have ISA Server 2004 running on Windows Server 2003 SP2. It has 2 NICs - one internal called LAN on 192.168.16.2, with a subnet of 255.255.255.0, and one external called WAN on 93.x.x.2. The ...
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4answers
410 views

I need to somehow change my ip address

i`m in a lan using iptables/masquerade. what i want to do, is to login in a web application.i write my user and passwd and click login and everything is fine, but if i try to modify something in that ...
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1answer
878 views

Redirecting requests from domain to local server

I'm developing a web application for a pre-production hardware device which has the domain from which it loads the app hard-coded. Is there a (simple) way for me to reroute these requests to a local ...
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3answers
986 views

How to avoid DNS spoofing for DNS lookup

I am trying to find a way to obtain the real ip addresse(s) for a domain name. I'm working on a router doing traffic shaping with the use of iptables and tc. I then need to setup iptables rules for ...
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15answers
8k views

Are IP addresses “trivial to forge”?

I was reading through some of the notes on Google's new public DNS service: Performance Benefits Security Benefits I noticed under the security section this paragraph: Until a standard ...
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2answers
251 views

Can IP spoofed traffic get above the transport layer?

I'd like to know whether you could get packets with a spoofed IP address above the transport layer. My thoughts are: TCP: No, as acknowledgements would never get to the original sender if their IP ...
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2answers
3k views

Reject obviously spoofed messages in Exchange 2007 SP2

I have an Exchange 2007 SP2 server which happily accepts SMTP messages whose sender is SomeRandomString@mydomain.com and the recipient is SomeRealUser@mydomain.com; this leads to all sort of spoofing ...