Questions tagged [protocols]

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HTTP/2 Not working for my resources

I am using Google Cloud Compute Engine running Apache 2. I enabled HTTP2 sudo a2enmod http2 I added this to the top of my default-ssl.conf and made it global. Protocols h2 h2c http/1.1 The ...
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Does Microsoft Azure blob storage allow BitTorrent uploads? [closed]

Amazon S3 buckets can be uploaded (and downloaded) using the BitTorrent protocol. Can this be done with Azure blob storage? I can't find an answer for this on google. Alot of hits are for the Azure ...
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1 answer
5k views

what is the maximum http response latency?

I'm trying to figure out where to place servers that use HTTP calls to another server for retrieving results. I cannot seem to locate any definition of HTTP that defines the maximum response time ...
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The greeting from an IMAP server — format?

I'm trying to understand the specification of IMAP found at INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1 (RFC3501) Does the greeting from a server always have the following format? * OK something ...
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Bug with TLS 1.2 in Internet Explorer 11 / Windows 7?

I am running some small websites which are served by Apache / Linux. Currently, I am trying to cut down the SSL configuration as far as possible to make it as secure as possible. I have configured ...
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2 votes
1 answer
1k views

git clone ssh syntax difference?

Setup There is a host (H1) running gitlab-ce git server within a docker container (C1). The host's OpenSSH server runs on port 22 and provides a host key keyH. The gitlab container provides its own ...
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1 answer
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How to switch between TLS 1.0 and SSL 3.0 at Java/JRE level?

I am using java 1.6. I have setup my tomcat as my ssl enabled server. And i have setup a ssl enabled client (java code). When i do a communication from my client to server. In java ssl dump in tomcat ...
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Protocol moves to another ethx Suse

I have a server which has 2 nics eth0 and eth1 eth0 is used for our email traffic server. everything working fine some time later a eth1 was added for backup purposes so this new nic sends data to ...
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3 votes
2 answers
944 views

Why is there an EtherType for SNMP?

Today I was reading through some documentation about the fundamentals of networks (IP, Ethernet, MPLS, ...). And while looking at the Ethernet Types that can be used in the Ethernet Frame I saw there ...
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3 votes
3 answers
3k views

Layer 3 Protocol only in wireshark

I have a simple question: is there any way in wireshark to avoid resolution of protocol besides the protocol of layer 3 ? For example, in the column protocol, instead of showing http, I want it to ...
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2 answers
863 views

What other protocols must not be fire-walled for FTP to work? [closed]

My Netgear router randomly reset itself the other day loosing all of my config settings: DSL details, Firewall rules, the lot! So I set about restoring all of the details manually, but when it came ...
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2 answers
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How are CIFS and SMB related to each other?

Are they synonyms, or components of a protocol stack? Answers with proof links are welcome.
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What is Reverse Gossip Transfer Protocol?

Playing with wireshark, I see a bunch of packets that say something like rgtp > https [ACK] Seq=???? Ack=?????? Win=????? Len=0 What is a Reverse Gossip Ttransfer Protocol? What is it used for, ...
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  • 239
-1 votes
2 answers
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Why bittorent needs many ports [closed]

Why bittorrent needs as many ports?..Why not just one-2? I know that some of them are used for peer discovery, but dont exactly know how is this happening. Can you please provide more technical ...
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  • 111
3 votes
2 answers
2k views

Using self signed SSL for mail

Rather than purchasing SSL I would create a SSL certificate. Of course my SSL certificate will not be useful that browsers show "Un-trusted SSL". Can I use Self Signed SSL to my mail server to send ...
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1 vote
1 answer
148 views

Which is a faster USB protocol RS232 or PS/2 [closed]

A manufacture just asked me For the USB interface , we have two communication protocols , one is USB to RS232 , one is USB to PS/2 . Which one is faster? This is a USB Devise.
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3 answers
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Ethernet: network topology

Consider a standard GigE network switch. In order to do the switching, presumably it needs to maintain a map of MAC addresses of all things that exist on the network to its (switch's) port numbers. ...
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2 answers
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tcp syn checking

I have a WatchGuard Firebox that I've recently configured. All of the policies look fine and all appropriate services seem to be working correctly. However, one or two (seemingly) random nodes keep ...
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1 answer
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What information do I need for initial setup of BGP?

I will be installing a MikroTik BGP capable router into a datacentre tomorrow, I have almost no idea how to do this but luckily there is an identical mikrotik router that has already been setup and is ...
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2 votes
2 answers
162 views

RADIUS Protocol - Sending more than 255 bytes in vendor-specific field

I am using the RADIUS protocol to for sending some values from client to server. I am using vendor specific value pairs, and defining our own types. But the value length for Vendor-specific data is ...
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2 votes
5 answers
1k views

Server Room Protocols/Server Room Management

I'm new to this site but have found the articles and feedback very useful. We have a Server Room which our Organisation owns and controls, yet there are several thirs party companies that have open ...
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1 vote
1 answer
8k views

How many bits for sequence number using Go-Back-N protocol

I'm a regular over at Stack Overflow (Software developer) that is trying to get through a networking course. I got a homework problem I'd like to have a sanity check on. Here is what I got. Q: A ...
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1 answer
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Figures on data usage through various Internet protocols?

Given this list of protocols used by the internet does anyone know any way of getting information on the amount of data (or any other usage metrics) for various ones?
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3 answers
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Tool to download only selective pages / particular page from a document ! [closed]

Many tools have the feature of printing a particular page or a continous range of selective pages. Similarly, we might require to see only few pages of the particular document that is available in ...
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6 votes
3 answers
538 views

Should web farms be concerned with TLS handshake overhead

I have a web farm where the web servers are responsible for negotiating the secure connections. Does anyone else with a web farm go out of their way to reduce TLS handshake overhead by ensuring that ...
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1 vote
3 answers
2k views

Understanding VOIP "sniffer" traces

My customer is doing an Avaya VOIP pilot. I am looking at traces in Wireshark to build my troubleshooting skills. I have found much documentation on VOIP, but little that focuses on protocol ...
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1 answer
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TCP congestion avoidance (need for clarification)

I've just some question regarding TCP congestion avoidance algorithm. First of all I'm looking for explanation of, why the part of congestion avoidance algorithm is called "fast recovery"? I mean I ...
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5 votes
6 answers
5k views

TCP connection handshake

Why is in TCP a 3-way handshake used during establishing a connection? Meaning, why it is not enough to use a 2-way handshake?
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1 vote
3 answers
4k views

DVMRP vs PIM-DM multicast protocols

Recently I've started to read RFCs of different multicast standards and came out to the question, which is not totally clear for me. I'm trying to compare DVMRP vs PIM-DM routing protocols in order to ...
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1 vote
4 answers
833 views

What uncommon services/protocols are out there? [closed]

This is a wiki for uncommon services that can be hosted on a server. I'd interested in anything which is less common whether it's due to obsolence (eg: gopher protocol), or newness (eg: Podcast ...