Questions tagged [protocol]
The protocol tag has no usage guidance.
49
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How to use IPPS with Brother printer and Mac?
I have a Brother laser printer connected to my router via ethernet cable. Within the Brother configuration web portal, I did the following:
disabled all wireless functionality on the printer
disabled ...
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0
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120
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Configuring Tomcat for customized protocol handler
This is on Tomcat 9.0.71.
I need to use a protocol handler of com.ibm.crypto.provider.
I set JAVA_OPTS with -Djava.protocol.handler.pkgs=com.ibm.crypto.provider but this is not sufficient. The problem ...
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Why does OpenSSH on Macos look for known hosts file twice?
Open SSH debug trace shows that ssh is looking for the known_hosts file(s) twice, once before the key exchange and once during, why is that?
I understand that as part of the key exchange ssh verifies ...
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2
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website says connection insecure if typed without the protocol
I have a website and when I type the url with 'https://' the browser shows the site normally, however if I do not include 'https://' in the url, the browser brings me to a page that says my connection ...
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1
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Could not determine IPv4/IPv6 protocol
I am having this problem all of a sudden. Open VPN worked brilliantly until December 2021- then it stopped connecting with the following reason:
RESOLVE: Cannot resolve host address: xxxx.xxxx.com:...
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403
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IMAP server responds with "BAD..." error to "LIST..." after similar "LIST" command completes successfully
I'm getting a BAD... error when running a LIST command against an IMAP server that I'm not understanding and could use some help with. I run almost an identical command just prior to it to list the ...
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235
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DHCPv6 (RFC 8415) - What are reasonable initial values for time intervals T1/T2?
As described in Section 18.2. - Client Behavior of DHCP - RFC 8415 a client uses the Solicit message to discover DHCP servers configured to assign leases or return other configuration parameters on ...
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Apparent inconsistency in Apache SSLProtocol
I'm running a server with Debian 10 and Apache Version: 2.4.38-3+deb10u3. The behaviour of different settings for SSLProtocol is puzzling. SSL has been configured to be quite secure. This setting ...
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Do ports change for every request? Are Ip ports are different from system ports?
A typical ip address has >65k ports then again a system that runs localhost offline has port which sometimes face conflicts. Am very under-read in this area please give some light. Pardon my English.
...
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4
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866
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Is RFC 7231 the latest version about the HTTP/1.1 protocol?
I'm doing an university work on HTTP and I try to explain what happens when there is an HTTP connection between a client and a server. To do this, I'm using the "curl -v -i" command on an Ubuntu ...
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TCP protocol strange behaviour in my program
I started working recently in IT field and as first assignment they want me to communicate with a remote board with a simple Socket using Java.
Today I completed all the job but I noticed that my ...
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2
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What's the point of repeating an email address in "The Envelope" and the "The Header"?
I learned that both the FROM address and the TO address is repeated in a hidden element called the "envelope", and then repeated again in the "body".
Question
Why isn't the envelope data copied into ...
- 301
3
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1
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714
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tcpdump - prevent interpreting/decoding protocols
Is there a way to stop tcpdump from (mis)interpreting protocols in captured packets?
It assumes that traffic coming from port 4500/udp is always IPSec traffic, 53/udp is DNS query, etc and tries to ...
- 53
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Listener Protocol for ELB in front of Squid Proxy
We have two Squid proxy servers for High availability. We want to use Amazon ELB in front of these Squid proxy servers.
When we use Load Balancer Protocol as TCP and port 8080, Instance Protocol TCP ...
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448
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nginx default SSL SNI host overwrites SSL Protocols
I have setup nginx with SSL (SNI based).
My first served vHost uses
server {
...
listen 443 ssl;
server_name host1;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
....
On others vhosts I wanted ...
- 241
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RFC that requires DNS servers to respond to unknown domain requests
My domain registrar and DNS provide currently ignores DNS requests to unknown domains. By ignore I mean black-holes and never responds which causes my DNS clients and resolver libraries to retry, ...
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1
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Exim error SMTP call from [X.X.X.X]:50135 dropped: too many syntax or protocol error
My clients server access keeps getting blocked by CSF.
The Exim log produces:
no host name found for IP address X.X.X.X
Exim error SMTP call from [X.X.X.X]:50135 dropped: too many syntax or ...
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Protocol used between a RADIUS client and a computer?
I can't find documentation about the protocol used when a computer wants to reach a network with 802.1x.
RADIUS client (switch, access point) use UDP/1812-1813 to communicate with RADIUS server.
How ...
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1
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810
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What authentication protocols are negotiated by HP Printers to Windows Server Shares?
I am trying to find information specifying the protocol negotiation process for newer HP printers that can perform direct scans to Windows-style shared folders - in particular, the HP 8600-series is ...
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1
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Why is FileZilla so much faster than PSFTP?
I'm using FileZilla 3.10.3 and PSFTP 0.63 (PuTTY). Can anyone help me figure out why the throughput I get is so drastically different between the two clients? It can't just be a shortcoming of the ...
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3
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Why does VNC viewer on Mac Book Pro report RFB protocol error when connecting to AWS over L2TP?
There is a small group of us working on Amazon Web Services (AWS), we use mac books as our desktop machines and VNC into servers running on AWS. The problem started when we upgraded our VPN from PPTP ...
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HTTP Protocol Information Leak [closed]
I have done a test and The result is
HTTP Packet Inspection (Low)back
Port: http (80/tcp)
Summary:
This test gives some information about the remote HTTP protocol - the version used, whether HTTP ...
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Can nginx use different SSL protocols in different server blocks?
I'm trying to setup a hostname to demonstrate a poor SSL config and I'm having some issues. I can specify some bad cipher suites, but nginx seems to ignore the protocol selection.
server {
...
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SSH without invoking shell
I've managed to mess up some shared libraries on my system, and now my shell cannot be run, thus locking me out of the system. Both ssh, sftp, and scp, as configured on the remote system, seem to rely ...
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1
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How to configure nDPI for iptables
I am new to nDPI, I have installed nDPI but when I add rules like;
iptables -I OUTPUT -m ndpi --http -j REJECT
It shows this error
iptables v1.4.7: Couldn't load match 'ndpi':/lib64/xtables/...
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Does the DNS resolver know about the application layer protocol in use? [closed]
My iPad's 3G connection usually gets hijacked and shows me my provider's welcome page every time I first browse the internet. I have noticed that this only happens when using HTTP, and pages that use ...
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2
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3k
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Which file transfer protocols support server-side copying?
I'm wondering which file transfer protocols available on Linux support server-side copying (and doesn't internally download and reupload files). The simplest use case I have is for copying large files ...
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EPP Protocol create multiple domains in one command
I've seen <domain:check> command can check multiple domains in one command. Is it possible to do the same for the <domain:create>?
<?xml version="1.0" encoding="UTF-8" standalone="...
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Nginx with SPDY Draft 3, is possible?
I'm currently using Nginx 1.4.1 with SPDY module.
Unfortunately, the Nginx SPDY module, work only with the Draft 2 of protocol.
Is there a way to use Nginx, with SPDY Draft 3?
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What is LDAP used for? [closed]
I've been going over some LDAP tutorials, but I can't imagine why would i use that? I figured that it is some kind of a list of all users and usergroups, but where is it different than system users ...
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What protocol does Exchange use to relay email to other Exchange servers?
Suppose an organization has multiple Exchange servers. These Exchange servers can use SMTP to relay email to each other. In this case, they would probably use some Exchange-proprietary extensions, ...
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Difference between protocol and service interface [closed]
I came across the terms Protocol and Service interface while studying the OSI model and as far as I can tell they seem to be doing the same thing.
So what's the difference between the protocol and ...
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SNMP protocol and acceptance of the hyphen character
I'm no expert at the SNMP protocol and I've failed to find anything in the protocol RFC documentation regarding the tolerance of hyphens in the SNMP community string. It appears to be a double ...
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how to set open Launch Application via group policy for callTo protocol
I have implemented callTo protocol to call a dialer and vbs script from web page within the intranet. I have deployed the registry to all machines in network via group policy and his all works fine. ...
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Technically, How does uploading Apps to an Android Phone Work? [closed]
Amazon.com has an Android Marketplace. How do the apps go from Amazon.com to my phone? I am looking for a protocol level analysis. Do they use a basic protocol like FTP and then check with a Google ...
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What's the protocol-level difference between IPSec and "Cisco IPSec"?
Most VPN clients distinguish between IPSec and "Cisco IPSec." For example, (Apple's) iOS treats them as essentially separate things.
But I can't find any explanation of what the protocol-level ...
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2
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Formal separation marker of syslog events?
I've been looking at RFC5424 to find the formally specified marker that will end a syslog event.
Unfortunately I couldn't find it. So If I wanted to implement some small syslog server that reacts on ...
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5
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280
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Best/Secure Windows 2008 Server transfer protocol
I hate FTP because it is not secure, passwords are cleartext, etc. I want something safe for my windows server and I used to use sftp on linux for a while but now I turned to windows solution so I'm a ...
- 1,413
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Postfix to manage its internal error in an explicit way
I'm currently testing in lab a redundant/laod balancing setup where Keepalived health checks verifies that Postfix is running on 2 servers.
While Keepalived is working well, great convergence time ...
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1
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SCEP Protocol on Linux
Is it possible to setup an SCEP protocol on Linux? My company is going to be adopting over-the-air enrolling for iPads and I can't find anything for this on Linux. Has anyone done this before? Is ...
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What are the exact protocol level differences between SSL and TLS?
This is a technical deep dive after this overview question was asked.
What are the protocol differences between SSL and TLS?
Is there really enough of a difference to warrant a name change? (versus ...
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Will firewalls block my non-HTTP network protocol even if I use TCP port 80?
I want to create a simple JSON-based protocol to allow my game to talk to my custom server, but I don't want embed it in HTTP.
If I send a custom text-based protocol request to my server on port 80, ...
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287
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2 interface, 2 ISP - Application Binding?
I have 2 interfaces - Wlan0 and Eth0, and both of them have separate internet lines - X & Y ISP. I want some applications to use WLAN and some to use ETH to send/receive traffic. Where can I bind ...
user47178
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Is the port number the same when connecting to git via the git+ssh protocol?
I was wondering when connecting to a git repository, does the git+ssh protocol use the same port number as just using the git protocol. For example:
git://example.com/git/helloworld
git+ssh://root@...
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403
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Question about network topology and routing performance
I am currently working on a uni project about routing protocols and network performance, one of the criteria i was going to test under was to see what effect lan topology has, ie workstations arranged ...
algorithms
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257
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What is voice xml and how can I host it
while looking for a way to use speech recognition with flash I crossed paths with voice xml. I've gone through the wc3 description of it but still I have a few big questions.
Can I simply create a ...
Logodym
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Can anyone guess what protocol these packets belong to?
We see these packets being injected in an FTP-DTP channel during a downlink file transfer on Telstra's NEXTG mobile network. We are not sure if these are network level packets, a problem with our 3G ...
user27695
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535
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What protocols do various web-services (ie ports) use—for unblocking purposes?
I recently overhauled my router’s firewall rules. I erased everything and added minimal permissions for the ports that I need to be open. However I found that Blogger was no longer able to publish to ...
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Can I get a clear summary of the new features of pNFS?
So I'm somewhat familiar with NFS and ilk, and I realize that NFS 4 is adding a host of new features, when I stumble onto pNFS. It appears to be "parallel" NFS storage, but the diagrams and ...
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