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0
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0answers
30 views

Is it possible to intercept traffic by using a WAN facing DHCP server on an ISPs cable network?

I am running pfSense on an edge firewall conncted to a cable line. I can see many DHCP requests hitting my firewall. I guess this requests are getting send by cable modems currently booting up and ...
0
votes
0answers
47 views

Spoof DNS in a Rogue AP [migrated]

I am using 2 interfaces on my computer, eth0 grants access to the outside world and wlan0 is where the Access Point is set up. My configuration is based on 2 networks 192.168.1.0 on eth0 and 10.0.0.0 ...
1
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2answers
85 views

How does DHCP starvation work? How to prevent it?

Is it the same as DHCP exhaustion? Can LANs be vulnerable to such attacks or it's against WiFi only?
2
votes
1answer
1k views

shellshock dhcp exploitation

An attacker can exploit the bash bug in the DHCP protocol. On searching , how this can be performed , I found "http://www.sectechno.com/2014/09/28/shellshock-dhcp-server-exploitation/" , but could ...
8
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2answers
2k views

Is connecting to an open WiFi router with DHCP in Linux susceptible to Shellshock?

Source: http://lcamtuf.blogspot.com/2014/09/quick-notes-about-bash-bug-its-impact.html For the same reason, userland DHCP clients that invoke configuration scripts and use variables to pass down ...
0
votes
1answer
50 views

PXE TFTP Vulnerabilities

I am planning to implement diskless clients for booting Windows 7 clients. I am trying to determine whether to use PXE with TFTP or iPXE with HTTPS or iSCSI. Are there any vulnerabilities with using ...
2
votes
3answers
218 views

What are the biggest security concerns on PXE?

What are the top security concerns when setting up a PXE (Preboot Execution Environment) booting environment, ordered by severity of a possible exploitation? Things that I thought of are (in no ...
1
vote
1answer
60 views

DHCP Exhaustion [closed]

I am trying to look for another tool to perform DHCP Exhaustion, I currently use metasploit, but I want to see what other open source are out there. Please let me know if you use something else.
1
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1answer
1k views

How to prevent DHCP Starvation attack?

All this while, I assumed that switchport security is enough to prevent DHCP dos attack. If I set it maximum 1, there can be no more mac addresses packets. But, a friend told me that using the tool, ...
7
votes
3answers
6k views

Detecting(and locating) rogue DHCP server on a local area network

How would we detect and locate a rogue DHCP server on our local area network?
-3
votes
2answers
281 views

How do cellphones discover wireless APs? [closed]

I'm trying to find some information on how cellphones discover which wireless networks are in range? Is it via ARP or DHCP discover? Also how often does a cellphone do this polling? I can't find any ...
0
votes
2answers
372 views

bootp enabled by default on dhcp reduce security?

by default in Microsoft DHCP server configuration Bootp is enabled and choose both(accept DHCP request and Bootp ) i know that how this work and know about how configure two DHCP Server by Bootp ...
13
votes
3answers
2k views

Is a predictable MAC address a risk?

If you knew from the public internet that a certain IP address belonged to a machine with a certain MAC address, can you see any security exposure associated with that? I know that some software will ...
2
votes
5answers
5k views

Stopping users from spoofing an IP

I have a MikroTik router (that has firewall and scripting capabilities) that is acting as a DHCP server for the 192.168.1.0/24 subnet. Is there any way I can stop it from passing traffic from a user ...
4
votes
4answers
10k views

What are the laws regarding ISP recording IP addresses? How would they know who had which?

Since most internet users have ISPs using dynamic IP addresses (e.g. someone gets a new external IP address every few days) are there any laws requiring the ISPs to keep logs associating an IP address ...
-1
votes
1answer
218 views

Impact of attack occured in Radius, DHCP and HTTP servers on VOIP?

Assume we can crash the RADIUS server in a VOIP system. What would be the impact on the confidentiality, integrity, and availability of VOIP service. What would be the impact if the same question if ...
2
votes
1answer
488 views

Large lan party : How to identify the users on the network?

I would like to know what are the good way to identify users on a large lan party when you manage network ? I had the idea to make the users register them self at a desk, they give us Firstname, ...
3
votes
1answer
395 views

captive portal wikipedia article

Something on the wikipedia page regarding captive portals have confused me: http://en.wikipedia.org/wiki/Captive_portal When a client requests a website, DNS is queried by the browser. The ...
7
votes
6answers
1k views

How can I restrict access to network data by an unauthorized computer that connects via Ethernet?

I assume I can configure most routers to only assign IP addresses to specific MAC addresses, as is possible with wireless routers. However what if a computer is connected via Ethernet and does not ...
2
votes
5answers
10k views

Setting DHCP lease time to very small time increases security?

Yes or No? :O And why?
15
votes
5answers
18k views

DHCP vs. Static IP Addressing

How do DHCP and Static IP addressing compare, from a security standpoint? What are the risks/benefits associated with each? I know the preferred solution between the two will vary with network size ...