Internet Protocols

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The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries, organized in abstraction layers, traditionally called "Link," "Internet," "Transport" and "Application”. Its routing function enables internetworking, and essentially establishes the Internet. IP defines packet structures that encapsulate the data to be delivered. It also defines addressing methods that are used to label the datagram with source and destination information.

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We use our proxy to whitelist certain trusted sites only
(ie by default all URLs out there in the Internet is blacklisted).

We whitelist  *.microsoft.com & the O365  URL but these
URLs are further 'linked' to other URLs like
  outlook.live.com & a Skype url for business  :
need to allow/whitelist these (Skype for home/consumers
not needed, it's only for the 'business' that's needed).

Is there a way to find out all the sub-URLs of the MS sites:
think I've heard of a tool that could 'spider' or 'retrieve'
all sub-URLs within a site but can't recall the tool name.

Also, give a brief instruction on how to use the tool
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OWASP: Forgery and Phishing
LVL 13
OWASP: Forgery and Phishing

Learn the techniques to avoid forgery and phishing attacks and the types of attacks an application or network may face.

I want to pass username and password to a website login screen instead of the user entering the data.  Can this be done?
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Hello,

If I am running a tcp ping tool on a virtual windows server that is hosting my website also, would it be possible to use the tcp ping tool to ping the visitor of my website to record the latency/round trip time without the stateful firewall blocking it?

The issues I came up with would be that all/most home-based firewalls are stateful firewalls, tcp communication can use only one IP and one port(if I am correct?) per application (website in this scenario). So I would have to have the tcp ping application listen in on the port using another IP, or open a new port (and IP) to communicate with the same website user. So my second question would be: would the stateful firewall block this communication since it is from a different port and/or IP even though it's on the same web server?
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I'm currently facing an issue with CUPS. I recently discovered that the job ID is always appended before the job-name when CUPS sends out the job.

Due to requirements, I'm required to send a file between servers, 1 of them being a print server, and the other using CUPS. They must communicate with each other using the "Internet Printing Protocol (http)" mode on the CUPS interface.

The print server is receiving the print job properly, and the job is able to print successfully, except for one minor detail: the filename on the printer is always shown to be "#### - Original filename" instead of just "Original filename", where #### is the number representing the job ID.

After conducting some research and poring through the logs, I found that CUPS' http backend (/usr/lib/cups/backend/http) was the cause of this appending of job ID, resulting in the "job-name" IPP attribute to be changed.

I have 2 questions:

Is there a setting or configuration value that can remove this appending of job ID?

Is there a way to modify http backend by ourselves to adjust its behaviour? (I opened up the http backend file in an attempt to modify it ourselves, but it seems to be an executable instead of a CUPS filter, so I'm unsure of how to go about doing it)

Any help would be greatly appreciated!
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Hi,
I added a Content-Security-Policy that works in Firefox and Chrome but not Safari.  I am using Safari 10.1.2. In Safari I get the error:
“Refused to apply a stylesheet because its hash, its nonce, or 'unsafe-inline' does not appear in the style-src directive of the Content Security Policy.”
So, I tried adding ‘unsafe-inline' to style-src but I still get the error in Safari.  I have some hashes in style-src (that were provided by Chrome), and when I get rid of the hash, Safari gives no errors as long as I have ‘unsafe-inline’ written.  If I put the hash back in, I get the error again in Safari.  The other browsers work fine.  Does anyone know what I can do to get the Content-Security-Policy working in Safari?  Any help is greatly appreciated!
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Dear Experts,

We have two data centers, one is in New York and the second is in Chicago. Our vendor in the Chicago Data Center is ceasing the ISP Services. We have a circuit between both data center. We have deployed squid proxy on a Ubuntu 16.04 Server in the New York Data Center and are planning forward the internet traffic from the servers in the Chicago Data Center using the Squid Proxy.

We are able to forward the standard internet port i.e 80, 443, but we are unable to forward non standard internet ports e.g. 11002, 55005 that we might use for other data services.

When I run a sniffer from our main office firewall to check the incoming traffic coming from the Chicago data center via 11002 and its is coming via the Chicago ISP instead of the New York Squid Proxy Server.

Any help will be appreciated

Thank you,
M


 

Please find diagram attached. Please let
Squid.png
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I have about 30 000 files which are a mix of jpg, png, mov, mp4 and potentially others.  Total size is around 70GB.  I've collected these into a single folder structure and left an upload to google photos running, and then used the desktop uploaded and left that for a week to upload any that were missed.

Now, I'm not sure which have uploaded successfully and which haven't.  The 'log' created during the upload is not helpful when working out which files haven't uploaded.  I've done a download of the photos from google photos through their backup system.  However, I can't just windiff between the two folders as they have different subfolder structures.  I've tried doing an xcopy of files to a single folder but some of the files have the same name (although different dates) and I may miss out on file-extensions that I'm not aware are in the listing.

Does anyone have any ideas or scripts I could run to make the problem easier to solve, or to come up with the final list of files that haven't uploaded?
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Device: ASA 5510

Over the last couple of weeks I have noticed that my main (outside) connection has no traffic at certain parts of the day.
ie around 9/10 am until about 1130 am/12 pm there is no traffic on this interface. Our backup interface kicks in until traffic continues on the main interface. During the down time if i plug a laptop and put in static IP, I am able to get out to the internet. I have talked to the ISP they are saying its on my end.

Any suggestions on what could cause this?
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Internet Protocols

8K

Solutions

13K

Contributors

The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries, organized in abstraction layers, traditionally called "Link," "Internet," "Transport" and "Application”. Its routing function enables internetworking, and essentially establishes the Internet. IP defines packet structures that encapsulate the data to be delivered. It also defines addressing methods that are used to label the datagram with source and destination information.

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