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44

This is not a security risk. The router looks in its ARP table to find the MAC address of your IP address. The reason it can do this, is because you are connected to the router via layer 2 in the OSI model. The router simply looks up your IP address in the ARP cache to find its MAC address. A website on the Internet is not connected to your LAN and will not ...


14

The first and main thing is to ensure that the firewall on your host is configured to properly drop incoming packets with source or destination address set to 127.0.0.1. Under normal circumstances, there should be no packet coming from the network and showing such addresses. However an attacker may attempt to forge such packets in order to reach your local ...


10

There is no risk here. The Internet is not just one protocol, but a series of protocols that stack up on top of each other. The exact definitions of each part of the stack differ somewhat from person to person, but the two we're concerned about here are fairly well-defined: the link layer and the network layer. Depending on who you ask, these layers have ...


6

If the service provides a web interface it might be vulnerable to CSRF attacks, XSS attacks or "same site" scripting. All of these can be triggered by just visiting the attackers external website, which by itself might be caused by malvertising or phishing. For these attacks it does not matter if the service is listening only on localhost, because it is only ...


6

A potential vulnerability would be to compromise a low-privilege account/service and use that as a pivot to access the localhost-bound service. I usually prefer UNIX sockets for that purpose as you can apply user/group permissions on them (that will be transparently handled by the OS, the user won't have to keep yet another password). Plus, they're also a ...


6

I must disagree with @vahid. If there are multiple hops between the NAT and the host to which the connection is being port-forwarded, you may actually be able to elicit an ICMP TIMEX message. As you may know, every IPv4 packet has a 1 byte TTL field. If you determine the distance to the NAT (say 10 hops) and the actual concealed host is actually 12 hops ...


2

That's a truncated hostname, and it's actually in reverse IP order. The full hostname is 182.53.252.66.knds.xdsl.dyn.ottcommunications.com. OTT Communications seems to cover from Maine to West Virginia. Maybe they're your ISP, or your ISP resells for them? Does your IP match 66.252.53.182?


2

DDoS can be analysed simply by checking the volume and pattern of traffic hitting the router. Any decent router will have something called SNMP (Simple Network Management Protocol). SNMP captures information about the performance of the router (in this case, it can be used for all manner of devices) and allows an external service to take the data, aggregate ...


2

What you are trying to achieve is not possible, by design. The only way of achieving this is by having access to either the gateway or the host machine. A NAT device serves the dual purpose of sharing an internet connection with an internal network and protecting the internal network much like a traditional firewall would. [edit] I stand corrected. The IETF ...


2

Since access has been sufficiently restricted, the weakest link is the HTTP request. This is especially true based on comments regarding the poor interfaces of the IP cameras. They likely won't do well if irregular requests are sent. Therefore consider a Web Application Firewall (WAF) such as ModSecurity as it will provide more flexibility over what ...


2

You can block by IP and by domain name. If the domain uses different IP addresses, and you block only one IP, the site will keep working with the other IP addresses. If you block the domain, and the site works by opening the IP address in the browser, it will keep working as well. You can block domain names and IP addresses by port number. So you can block ...


1

The answer depends on different factors. A few that may or may not apply: What protocol is it? (For example UDP is more prone to security issues in this case as it works statelessly and you might achieve something with a single spoofed packet). Do you consider attacks or only data access. (See above: you might be able to do a DoS attack for a faulty UDP ...


1

Also consider that the hostname localhost is not exactly the same as the IP 127.0.0.1 (it naturally needs to be resolved first), and in most situations relies on either an entry in the hosts file or a resolver/dns server capable of resolving 127.0.0.1. So, be sure you can strictly specify 127.0.0.1 instead of localhost when implementing security measures, ...


1

To answer question 1, I don't think either setting is as secure as you ought to be. Option 1 leaves masq turned on for the WAN when it doesn't need to be. Option 2 sets up a default accept rule for the WAN when it doesn't need to be. To answer question 2 and fill in the blanks on question 1: The input/output rule settings in OpenWRT are the default ...


1

Tor is best known for providing anonymity to the users communication. Every time tor uses different routes to forward the data to destination to maintain anonymity. If it is not doing so then same path can be traced to intercept the communication. I think this is the best method to anonymize the communication.


1

You are unable to see the rest of the network now because you have connected a router between and you are now basically on a 'separate' network --- check the IP addresses --- if they are not all in the same CLASS then you are on different networks and cannot see everything, although, technically everything is connected together. Secondly, a mac address is ...


1

Yes, your ISP is very clearly hijacking not only the DNS for google, but also DNS requests you try to send to outside DNS servers. You are correct in your analysis that the traffic to Google is not leaving your ISPs network. Your traceroutes also show that your DNS queries to Google Public DNS, as well as to Level 3's open resolvers, are not leaving your ...


1

It depends on the original firmware you are replacing, however it could be more secure than many "consumer" router firmwares because it does not support WPS at all (which is a known security risk)


1

Most enterprise-sized routers/firewalls include Intrusion Detection (or Prevention) Systems (IDS or IPS) which can notice and block certain kinds of network attacks. Most of these devices also regularly download new attack pattern definitions from the manufacturer, much like your PC's antivirus does. Some manufacturers also offer a service where they'll ...


1

If you use a recent enough browser (mostly not ie on windows xp), it will likely have SNI support to allow virtual hosting of HTTPS sites. This means that it will send the domain name unencrypted to allow the server to choose the correct certificate. Depending on what you use to filter traffic, you could thus block HTTP and HTTPS traffic to a specific ...



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