Networking Protocols

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Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.

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I've been examining the network routing table on my Windows computer, and I'm wondering why there are 3 entries instead of just 2.

At a command prompt I type "route print".

The resulting display has columns "Network Destination | Netmask", "Gateway", "Interface".

I'm wondering what the difference is between a Gateway and an Interface.

I'm thinking of a very simple Dial-Up Network setup:
Network AdapterThe Network Adapter has the following IP address:
Network Adapter IP addressIs this the "Gateway" IP address, or the "Interface" IP address? And what would the other IP address be for

If I wanted my program to send some data to IP 1.1.1.1, and I want this data to go out over Network Adapter 7.7.7.7, I could add to the network routing table a line with: 1.1.1.1   255.255.255.255 for Destination and Mask, then would I add 7.7.7.7 to the "Gateway" or to the "Interface"?
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Microsoft Azure 2017
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There is windows server 2008 R2 server and had the application installed. Clients devices have mapped the network drive. Whenever the server goes into maintenance every week the next day users see red x on the network drive and then not able to access the application. They have to restart the computer for it to work. We tried setting up client and server and changed idle timeout not to disconnect but still shows red x.
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vSphere HA Agent on this Host[Esx 6.5] Could not Reach Isolation Address 10.X.X.X  ie Gateway IP

Raised with Network Team saying all fine from Network end while we are not able to ping anything except Host IP ,No result in traceroute too

Please assist for required action plan to fix the issue
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While trying to apply a QoS outbound rule to a Catalyst 9300:

Invalid queuing class-map!!! Queuing actions supported only with dscp/cos/qos-group/precedence/exp based classification!!!

The config we are using is below:

policy-map Shoretel-Input-Policy
class class-shoretel-media-input
  set dscp ef
class class-shoretel-signaling-input
  set dscp cs3
class class-default
  set dscp default
policy-map Shoretel-Output-Policy
class class-shoretel-media-output
  set dscp ef
  priority level 1 percent 5
class class-shoretel-signaling-output
  set dscp cs3
  bandwidth remaining percent 15 
 class class-default
  set dscp default
  bandwidth remaining percent 60

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I was given public keys by vender , Im trying to connect to server through  WS _FTP utility .  I genertaed a set of keys using putty.  Im trying to import the private key that I created through Putty and receiving an error invalid format when trying to import  as my private keys through WS_FTP.

Thanks
Aron
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Hi Experts,

I try to make a backup from my Nas Synology DS414slim to an non-Synology nas  (ZyXel NSA320S), but I can't find software that can do that job.
Synlogy has Hyper-backup, but that needs installation on both sides (Synology => Synology) so I can't use that.
Other software on the Synology are cloudisch or dropboxisch solutions, what is overdone, because they are in the same room on the same network.

On this moment I running a copy from 1 share to an other, but that takes to long (oveer 24 hours) and I can't shutdown my PC while the copy is running.
So I need backup software on my Synology, that can save to a shere on the ZyXel,
or software on the ZyXel that can pull the data from a Synology share.

So Nas => Nas
not Nas => PC => Nas


Thanks !!!
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Hi guys,
I got a Meraki mx64 router - has 3 vlans-1,2,5
Vlan 1,2 - server is dhcp
Vlan5- meraki is dhcp

Meraki connecting to dlink dgs1510 switch1(vlan1 -untag,vlan 2-tag, vlan5-tag) , and Sameway switch1 connecting to switch2 in trunk(vlan1-untag,vlan 2-yah, vlan5-tag)

In switch1- all ports are vlan1 untag and vlan2 tag, as it’s going to phones and computers. Vlan5 not a member

In switch2- all ports connecting to computers which needs to be in different subnet from rest, so vlan5 untag In all ports. Vlan1&2 not members

If I do this setup - vlan 5untag in switch 2 not working. It’s not communicating to router to get dhcp. In trunk between switches vlan5 is tagged, but all ports in switch 2 , is untag.  So am little confused.
Am I doing anything wrong ? I have also attached a diagram to make it easier

[embed=file 1411870]
[embed=doc 1411870]
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Hi,
The folder is shared properly and why can't I refer to it like

\\182.173.77.208\shr2
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i have windows 2016 server
I have data coming in on port 3299
When i hits the server i need to remap it to port 9013 as there is an app on this server which is listening on this port

is this possible/
There is not router, the server sits directly on the internet so it needs to be done it windows
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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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Run connection test "telnet port 53" failed, is the 23 or 53 port connection issue? How to verify?
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I am having issues in a MPLS VPNv4 BGP setup where the CE is not receiving any BGP routes from the PE.

PE2 Cisco BGP config:
router bgp 1
 bgp log-neighbor-changes
 neighbor 1.1.1.1 remote-as 1
 neighbor 1.1.1.1 update-source Loopback0
 !
 address-family vpnv4
  neighbor 1.1.1.1 activate
  neighbor 1.1.1.1 send-community both
 exit-address-family
 !
 address-family ipv4 vrf CUST-1
  neighbor 10.10.20.2 remote-as 200
  neighbor 10.10.20.2 activate
 exit-address-family
!

CE2 Cisco BGP config:
router bgp 200
 bgp log-neighbor-changes
 redistribute connected
 neighbor 10.10.20.1 remote-as 1
 neighbor 10.10.20.1 soft-reconfiguration inbound
!

If you need more info please let me know (I can attach the full config if you want).
CE2_startup-config.cfg
PE2_startup-config.cfg
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Hi

Please help me to change the time on my OXE WBM switchboard
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Regedit \ RouterManager can be configured ?

Regedit \ TCPip6 every modified would be return to previous state, as motherboard changed, DUID mac info inside needed to , RFC3315 required .

When the OEM vga driver latest supported driver updated to Nov. 2018, whatever way tried, the computer Driver Manager can not see the latest date of the offering ?
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I have a wireless guest network and I'd like to test to make sure that it cannot get into my 10.10.0.0/16 internal network. Excluding ping sweep utility, what other tools can I use to do some sort of penetration testing? Thanks
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Hi, i have problem whith download Decrypting Cryakl from https://www.experts-exchange.com/articles/31579/Decrypting-Cryakl-1-4-0-0-1-4-1-0-FAIRYTAIL-Ransomware.html  (and decryptors.blogspot.com). Can help me whith download application?
I want test on CL 1.5.1.0. I have one pc whith this encryptor. I know that he was installed through the RDP, and have some files and log's. Maybe you decryptor can help.
It will then be possible to transfer the information to others.

Thank you.
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Port 5083 : Qpur File Protocol
Can somebody tell me for what purpose is this service used for?
1
Can someone explain to me where consensus algorithms fit within the TCP/IP model?  Let use Raft as an example.  Does it use multicast?  Does it use it's own transport number or TCP/UDP?  Does it live on the application layer?

Thanks
0
Milestone XProtect Management software.  How can I setup SNMP to monitor cameras and alert me when a camera is off line.
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I am trying to run an inventory on our servers. All I get in return are DCOM errors in event logs. I speculate the firewalls are blocking traffic but I cannot see anything helpful in Wireshark. I thought that telnet over 135 would fail but does not. Also ICMP is not blocked or I would not be able to ping the servers

Event Viewer
DCOM was unable to communicate with the computer XXXXXX using any of the configured protocols; requested by PID     2780 (C:\Windows\SysWOW64\cscript.EXE), while activating CLSID {8BC3F05E-D86B-11D0-A075-00C04FB68820}.


I have attached the Wireshark capture
pac.pcapng
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I'd like to redistribute eigrp into bgp on the Nexus 7009. I'd also like to set the correct metric. From my understanding, I have to use route map. I did some research and could not find any good info. Any helps will be greatly appreciated.
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Hi... Can anyone tell me what is this Simple Network Audio Protocol running on port 4752 ? Thanks
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We have a client who has just had installed a BTNet Leased line installed.
They have 8 static (5 usable) IP address on the line (/29 subnet) assigned. Lets say this is 122.122.122.0/29
We have configured the WAN1 of the Draytek with this range and configured the WAN IP address as 122.122.122.2, subnet 255.255.255.248 and its Gateway to point to 122.122.122.1

Connected a PC to the LAN1 and LAN2 Ports on the Draytek which allows us to access the Internet OK - All Works OK from LAN to WAN.

We are now trying to Port Forward specific ports (lets say 22 and 23 - SSH and Telnet) on the next useable IP address (122.122.122.3) through to a device on LAN2 which has been configured on a different LAN/Local Subnet (192.168.2.0/24). The device is on an IP address of 192.168.2.2, LAN2 IP on Draytek is 192.168.2.1

The Draytek can ping to the device with an IP of 192.168.2.2 but we cannot seem to get the NAT/Port forwarding to work correctly.

We have tried using One to One NAT for this solution along with a Firewall rule to allow WAN to LAN2 traffic for these ports. Logging (SYSLOG) is turned on for this rule but no traffic is ever reaching the firewall rule as no logs are produced.

To see if we had set something up wrong we have also tried port forwarding these ports on the first WAN1 IP address of say 122.122.122.2 but again nothing is logged with SYSLOGS

This is the first time we have tried configuring a Draytek, usually use Zyxel firewalls without any issues so I was …
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Hi

i configured OSPF between cisco ASR and Juniper router (service Provider).

OSPF neighbour has formed and exchange routes.

but ASR is logging a message " Cannot see ourself in hello from <juniper router id>, state INIT"

This is not happening all the time. its happening randomly once or twic a week. Mostly happening duing the peak hours of the business (but traffic is not hitting the maxium BW).

Due to this i can see some of the remote sites having high latency connecting to the DC for 2 -3 min and then when OSPF is normal the high latency is goiing away.

Not sure why the OSPF is flapping. Any particular config i need to add between juniper and Cisco ASR to Work.

regards
Logesh
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Relation between icmp and tcp,udp?
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Networking Protocols

11K

Solutions

16K

Contributors

Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.