Routing is the process of moving packets across a network from one host to a another. It is usually performed by dedicated devices called routers.

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Router detecting port scan and ack flood attack

Over the past few days, I'm noticing that the log of my wireless router is showing an ACK flood attack from various IP addresses. I use a D-Link DIR-600L. I've searched through the internet, also ...
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47 views

How to find the IP address of a router [migrated]

I live in a dorm where many students have setup small wireless networks. There are two of this networks that are very close to my room as the signal is very strong. Our college uses DHCP to assign IP ...
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612 views

Recent Fritz Box exploit

Background info: About 50% of the ADSL and cable internet access in Germany (and presumably parts of the EU) goes over AVM Fritz routers, either verbatim or rebranded as e.g. "1&1 Home Server" or ...
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87 views

Proxy via pfSense and exclusions for DNS

I have posted this to NetworkEngineering.SE, as that seems the more suitable audience for this question. I will leave this question open here but am happy to see it closed. I just did not want to ...
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2answers
117 views

Provider can access my local network?

I recently talked with my ISP about many things, basically related to my (little) company security, this guy is a networking guru to me, but he did a strange thing that worries me. Basically I have a ...
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2answers
399 views

Is dd-wrt generally more secure than manufacturer's firmware?

I have been advised to use dd-wrt, for richness of features and heightened security. The argument about security is that major manufacturers don't care much about the firmware, release with a lot of ...
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1answer
64 views

What features boost security for a home edge router?

I want to hide my home network behind a router and not worry about firewalls on internet-facing devices. Furthermore, one PC is going to be hosting some services, so I guess I need port forwarding as ...
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88 views

Indirectly relaying intranet server to outside world

I have an internal network of IP network cameras. The feeds from these cameras are ingested by a single server and presented from a unified web interface both internally and to the outside world (both ...
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122 views

Is my ISP BGP/DNS hijacking?

I've noticed some very suspicious activity from my ISP. Sometimes I would notice that when I ping google.com it would resolve to an IP which is owned by my ISP. I currently don't have an example ...
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3answers
291 views

For security reasons, can I block ping response on my router without disabling my network?

I seem to have a serious problem of being attacked and after looking up the attack source, 99% come from China, then Korea, Hong Kong etc. Here is a fraction of the report from my Router, which is a ...
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257 views

Netgear WNDR4000 open port 53

Why is port 53 open on the WAN side of the router? And more importantly how do I close it? Port 53 is not one of my forwarded ports. Discovered by doing nmap -pT:1-64 <my-external-IP> -Pn ...
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59 views

What are the Security Risks of Disabling Reverse Path Filtering

Reverse Path Filters are generally used to disable asymmetric routing where an application has a different incoming and outgoing routes. So idea is to prevent packet entering from one interface ...
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104 views

Verizon wireless router is pinging my web server - is this ok or bad? [closed]

So I'm working from a local cafe, doing some web development, and need to see something in my Apache's access log. And to my surprise, in the log I see, every 30 seconds or so, a request for my root ...
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1k views

DSL Modem Compromised?

Just found out that the primary & secondary DNS servers have been changed to 95.211.156.101 & 5.45.75.11. I had the following setup in place. MAC filtering and WPA2 for WiFi. ...
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3answers
2k views

What does the email header-line “message opened by mailclient” mean?

Today a Belgian MP claimed (backed up by a security expert) that her email headers show that her email was read during routing (text in Dutch). The published screenshot of the headers highlights the ...
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2answers
407 views

Could my computer be infiltrated if someone knows my external IP? [closed]

Could my computer be compromised if someone knew my external IP? I know that when you type that in it just goes into the router page, but my computer is connected to said router. If so, what is the ...
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114 views

Routing Protocol Encryption

As far as I know 'newer' versions of routing protocols support authentication between routers. What about encryption and integrity checks? Some implementations like this one from Cisco use MD5, which ...
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1answer
295 views

How is a Tor hidden service immune to exit node attacks?

Let me explain with a nifty diagram: IP/RP <-> bunch of Tor clients/node (Tor circuit) <-> Tor hidden service Wouldn't the last Tor client in the circuit knows that the message is for the Tor ...
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1answer
80 views

Set Gateway for our LAN

I am new to Networking. In our organization we try to setup gateway for security purpose so that we can block certain harmful websites. All I know is gateway is a device. What we have is the LAN ...
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2answers
90 views

non-MiTM Reverse SSL

Do non-MiTM Reverse SSL Proxies exist? Or do all proxies that do SSL-SSL mappings decode and then re-encode HTTPS traffic? If this is the case and I want to map https://mypublicdomain.com -> ...
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143 views

Which information does a standard router see?

I currently use the WLAN of my neighbours (with their accordance). It uses WPA2 and the DSL router is a Fritz!Box 7170 (see English manual). Which information can a user with an admin account of this ...
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247 views

The Pirate Bay's new Hosting Architecture [closed]

I read this article a moment ago: http://www.geek.com/news/the-pirate-bay-is-now-hosted-anonymously-in-the-cloud-1522725/ But it was very light on details. Is an architecture as described in this ...
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170 views

Security w/ Router Behind a Router?

I have a SMB (small-to-medium-business) router (router x) that my workstations run off of in my small business. I wanted to offer my customers wireless internet while they wait for service so I ...
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664 views

Can anyone tell if a wireless router is plugged into an Ethernet port (without actually seeing it)

In a large network if there is an Ethernet port in the wall, is it possible to tell if a switch or wireless adapter is plugged into it? (I'm talking about the cheap home routers - with the built in ...
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3answers
7k views

Access router if you don't know password

At home I have a wireless cisco router. Unfortunately I wasn't smart to change its ip or passwords. So anyone who is connected to it can access 192.168.0.1 and log in as admin using password admin and ...
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483 views

very secure router and advice to prevent intrusion

I suspect that my home router was been hacked (with firmware upgrade), so that I would like to build and buy a new router enough secure. Something that can prevent not authorized firmware upgrade. I ...
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70 views

No advanced settings option in router [closed]

How can I configure NAT Settings when my router doesn't have advanced settings option.
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How does “traceroute over TCP” work, what are the risks, and how can it be mitigated?

There is a utility called tcptraceroute, and this enhancement called intrace that is used just like a standard traceroute, but it works over TCP. How is the syn flag in TCP used to achieve ...
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4k views

Firewall defined Akamai IP Range [closed]

With obvious dangers of opening up a wide range of ips, does anyone know how I can get a source of IP ranges for Akamai? When talking to Akamai they say 'not possible' which I find surprising. I ...
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2k views

What are the security implications of enabling UPnP in my home router?

I found port forwarding entries in home router that I haven't manually configured. Is that because of UPnP? Are applications simply able to tell the router to forward ports on their own? Are there ...
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1answer
130 views

What are the requirements to sniff UDP packets in a Wireless Ad-Hoc network?

In a wireless Ad-Hoc network, I have two computers which communicates in UDP together from 192.168.1.3 to 192.168.1.5 I have a third computer (192.168.1.6) which wants to listen to the packets which ...
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3answers
5k views

Router password vs MAC filtering?

I just bought a Galaxy S4, and it didn't connect to the WIFI in my house (I have a 14$ router). After a bit of testing, I've decided to leave my connection open without a password, but added the ...
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491 views

How actually is Tor hidden service hidden from public?

Let's suppose I have a web server X, listening on port N for instance and configured as a Tor hidden service. How and where is implemented its' hiddenness from public access?
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209 views

Out-of-the-box Network Intrusion Appliance for non-Power User

First, let me apologize if any of this question is naive or beneath the scope of this board. Bear in mind the context and that I'm asking as an attempt to exhaust all resources. Also, I understand if ...
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268 views

Routable Domain for DC?

What is the impact of having a routable domain name in windows network infrastucture ? Having example.com in place of exemple.local as domain name have an critical impact ? if yes what should I keep ...
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2k views

How can I stop this DOS attack?

I have this entry appearing constantly in my router logs: [DOS Attack] : 5 [RST Scan] packets detected in last 20 seconds, source ip [xx.xx.xx.xx] They just never stop. It doesn't seem to affect ...
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640 views

Encryption of headers in IPsec tunnel mode

I am learning about IPsec's transport and tunnel modes. I understand that transport mode encrypts only the payload of an IP packet and is used for communication between two entities that both ...
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118 views

find hardware and OS specs on routers

How do you determine the model and IOS version of a Cisco router, if you have its IP address remotely, but have no physical access. For example, I run nmap -sP and can see the router's IP, but all ...
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2answers
559 views

Does “loose source and record route” drop the source address?

Is the source IPv4 address lost when a person uses "loose source and record route" and the destination address is put before the end of the list of addresses through which routing should occur? It ...
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2answers
2k views

do different subnet masks on home network provide any security?

So I have two routers on my home network: one is provided by my ISP, and the other is my private router. Router A- ISP router: 192.168.1.x router B- private router: 192.168.2.x Clients on my ...
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421 views

How to conduct a disguised LSA attack against OSPF?

I want to do disguised LSA attacks on OSPF network and be able to more analyze, so I do not know how it works in practice. This is a penetration test. The attack is described in the address [+]. I ...
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244 views

What is the fight-back mechanism in OSPF?

I want to know more about the fight-back security mechanism in OSPF routing protocol. When is the mechanism activated and how does it work? I found the source description of OSPF fight-back, but the ...
2
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1answer
427 views

Loki How to crack the password hash OSPF?

I have created for myself a lab of routers in GNS3 . Routing protocol between routers is OSPF. Now,by Loki penetration testing, I found that routers are the feature authentication. Using wireshark, I ...
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6k views

How is Tor secure?

If Tor is open source and thus its process of concealing your IP is known, then how does it keep anything secure? Couldn't someone look at the source code and figure out how to reverse the routing ...
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1answer
328 views

Any safety with private IP addresses? [duplicate]

Possible Duplicate: How can someone hack my PC if I am connecting to the internet through NAT? Private IP addresses (172., 192. etc.) are not routable addresses, and not visible to the ...
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3answers
425 views

Attaching hotspot to existing network - can it be secured?

I used to work for a company that did wireless hotspots, and this is the challenge that was given to me one day. I don't believe there is a secure solution to it, but it still bugs me for some ...
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7k views

Is NAT Loopback on my router a security problem?

Some DSL routers prevent NAT loopback. Security is sometimes cited as the reason. Is NAT loopback really a security issue? And if so, how is this exploited? NAT loopback... where a machine on the LAN ...
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393 views

Securing private IP space

As we all know, routers that you buy from the store come preset to hand out IP addresses using DHCP, generally on one of three networks: 10.0.1.1/24, 172.16.0.1/24, and 192.168.1.1/24. I personally ...
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129 views

Is there a router that acts as a VPN to get into the network but also sends traffic out through a VPN?

I have several servers that I want to lock down so they're only assessable from inside the network so I need a router that allows me to VPN in. On top of that I want certain ports(22,8022) from my ...
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128 views

Tracing The Source Of IDS/IPS Alerts

This may be more of a routing question than a security one but I am asking for the reason of security. I monitor an IPS on a remote network and there have been high alerts triggered recently that ...