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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We have Verizon FIOS triple play.  They supplied an actiontech modem router.  

The contract is ending and we are moving to Comcast internet only service.  Verizon wants just the TV boxes back - says I can keep the actiontech.

can we just plug in the coax from comcast into the actiontech and it'll work?  or is it set up / proprietary for Verizon service only?  (right now the actiontech is fed from the Verizon optical box with a cat 5 on the WAN port, but it has a coax connector also.)

Again, we're looking to use this for just the internet only service

Thanks!
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Free Tool: Site Down Detector
LVL 8
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

We currently have a Dell Sonic Firewall that is our firewall as well as our company router.  This is our main router for all of our sites in the company.  We have 16.  We implemented through our EMR (Electronic Medical Records) software an upload to a billing company.  They in turn configure and print bills and send them out to our customers.  This has worked fine for over two years.  When this was implemented, we were not required to make any firewall changes at all.

A week ago, the user doing this procedure received an error that the file could not be uploaded.  She called the EMR company, who in their effort to troubleshoot the problem, changed the upload method from ftp to sftp.  She then tried to upload and she got an additional error that port 22 was unable to send.  Seeing that error, the EMR said that the problem has to do with our firewall.  I spoke with the billing company who tried to do a trace route to our external IP.  They were unsuccessful, but I was able to do a trace route to them.  The only caveat is that the user can do this procedure from home with no problem.

I am willing to make firewall changes if necessary, I just don't know what they would be or why it is necessary now, if no one has made any changes other than the upload method from ftp to sftp.

Please help.  I am desperate.
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Hello all,

I have some Win 2012 3cx v15 phone systems and was having trouble with apple push notifications for calls to remote devices.  I've determined it to be a TLS issue.  I had used IIS Crypto to remove the less secure SSL 3.0, TLS 1.0 and 1.1, leaving just TLS 1.2 and more secure ciphers.  This breaks apple push notifications from the 3cx server/software.  I put back TLS 1.1, no luck.  Put back TLS 1.0, now push notifications work.  I find it odd that I should still need 1.0 enabled on the server.  

Is apple push still using that protocol and not 1.1 or 1.2, or might there be something else going on here.

I'm by no means familiar with protocols/ciphers, just determined what fixes the problem.
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I have a very simple exports files

/chroots   cati.vm.domain.com(rw,sync)
/chroots/talex/myhome web.vm.domain.com(rw,sync)


The first one has been there and works fine - the second one, I can't get to work... not sure if it's because I the second export is a subdir of the first?.... but when I try to mount it on the client, it just hangs and never completes.

Here is the fstab config I am using

192.168.1.29:/chroots/talex/myhome  /mnt/talexftp  nfs  _netdev,soft  0  0

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any ideas?
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Why would I be getting these errors on my logs. I am running DMVPN.
 dest_addr 4.5.6.7, SPI 0x8e584d60
000058: May 15 09:18:21: %IOSXE-3-PLATFORM: SIP0: cpp_cp: QFP:0.0 Thread:000 TS:00000309438262163039 %IPSEC-3-REPLAY_ERROR: IPSec SA receives anti-replay error, DP Handle 3, src_addr 1.2.3.4 dest_addr 4.5.6.7, SPI 0x8d670b5e
000059: May 15 09:19:53: %IOSXE-3-PLATFORM: SIP0: cpp_cp: QFP:0.0 Thread:000 TS:00000309529825315373 %IPSEC-3-REPLAY_ERROR: IPSec SA receives anti-replay error, DP Handle 3, src_addr 1.2.3.4 dest_addr 4.5.6.7, SPI 0x8d670b5e
000060: May 15 09:39:13: %IOSXE-3-PLATFORM: SIP0: cpp_cp: QFP:0.0 Thread:000 TS:00000310690125718495 %IPSEC-3-REPLAY_ERROR: IPSec SA receives anti-replay error, DP Handle 3, src_addr 1.2.3.4 dest_addr 4.5.6.7, SPI 0x8d670b5e
000061: May 15 09:50:40: %IOSXE-3-PLATFORM: SIP0: cpp_cp: QFP:0.0 Thread:000 TS:00000311376506767405 %IPSEC-3-REPLAY_ERROR: IPSec SA receives anti-replay error, DP Handle 3, src_addr 1.2.3.4 dest_addr 4.5.6.7, SPI 0x8d670b5e
000062: May 15 09:52:37: %IOSXE-3-PLATFORM: SIP0: cpp_cp: QFP:0.0 Thread:000 TS:00000311493607193615 %IPSEC-3-REPLAY_ERROR: IPSec SA receives anti-replay error, DP Handle 3, src_addr 1.2.3.4 dest_addr 4.5.6.7, SPI 0x8d670b5e
000063: May 15 09:53:38: %IOSXE-3-PLATFORM: SIP0: cpp_cp: QFP:0.0 Thread:000 TS:00000311554565979494 %IPSEC-3-REPLAY_ERROR: IPSec SA receives anti-replay error, DP Handle 3, src_addr 1.2.3.4 dest_addr 4.5.6.7, SPI 0x8d670b5e
000064: May 15 09:58:38: 

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Hi All, need some EE advice!

Scenario first, then question after. Please read through - although it may appear to be, this is not a printing question, it is a DNS setting question for assigning primary DNS domains on the VPN connection/ certificate.

Scenario:
I manage a VPN connection with a .pcf. connecting to a Cisco 5510 ASA
Users in a non-connected, non-trusted network on Domain B access a RDS on Domain A to run a particular application.
This access and use of the program is required all day as part of their job. It cannot be connected and disconnected frequently.
Static IPs are used for all connections via VPN.
I did not build the VPN connections but do have a little knowledge on modifying .PCF files etc. Configuring the Cisco 5510 ASA is not my strong suit.

- Connection path:
Users in Domain B Log onto their local PC with Domain B credentials.
They then launch Cisco VPN client v. 5.0.0.9 and log onto Domain A with Domain A credentials.
Next, they use a pre-configured RDP connection to RDP to the RDS in Domain A, using the same Domain A credentials.
Once on the RDS, TerminalWorks TS Print is used to print documents fro the application launched from the RDS.  
They have had ZERO problems for 2 years.

Problem:
- The IT guy at Domain B replaced the print server and purchased all new printers.
- Now, whenever these Users attempt to print it can take upwards to 20 minutes for the print dialogue to appear.
- Attempting to …
0
What physical communications ports and technical communications protocols do IP-Enabled UPS systems use to communicate with the network?
0
I have been trying to re establish a lost scanning connection with my Ricoh Aficio 2022 with my computer workstation.   No matter, SMB just failed for no reason.    I gave up.  it was working for years then just suddenly failed

So I installed filezilla.   Still does not work but i think I just do not have the correct syntax.

Filezilla server invoked for my computer.  192.168.1.xxx
The Ricoh then set up as follows

FTP
Port 21
Server 192.168.1.xxx (my workstation)  or \\servername    (tried both)
Path:    \folder    or  \sharename\folder
user:    username
password   password

None of this works.

I am missing one syntax call.  What is it?

The FTP connections work just fine on the LAN.       This is all LAN based.  I am not making any external WAN calls (yet)

Ports 21 and 22 forwarded to my 192.168.1.xxx computer

thank you
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when I view a pc's arp table after I change the ip address in an ip camera's firmware, it shows up in "arp - a" as a dynamic instead of static. All the cameras show up as dynamic, even though I set them all manually to my scheme. I wonder why?
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Currently I have a website that forwards to another website using GoDaddy's "Domain Forwarding" option.  Example:
When someone goes to www.Site1.com, it forwards to an entirely different domain www.Site2.com

That works for EXTERNAL users.
I would like this to happen for internal users as well and I use Microsoft DNS internally.
Does Microsoft provide a way to accomplish this?

Thank you in advance!
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update.microsoft.com

http://www.update.microsoft.com/windowsupdate

To the left is a subdomain whats on the right - correct ?
0
I have 2 routers connected to the same MPLS provider. I have the statement maximum-paths 2 under my BGP config. I'd like to know what will happen if I remove it.

router BGP 65001
...
address-family nsap
 maximum-paths 2
exit-address family

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Hi,

I'm connecting 4 x HP switches together.

Can I have some advice on the best way to connect these switches together please.

I have 2 x VLANs.

Currently 3 switches are connected together.  

Switch 1 to Switch 2
Trunk Ports 24 to 24 linked

Switch 1 to Switch 3
Trunk Ports 23 to 23 linked

Thanks
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Hello,

I have a point to point vpn set up. One location is 10.1.10.1 the other is 192.168.1.1.  On one computer at 10.1.10.1 I can connect to the db on the machine 192.168.1.6 (and I can ping 192.168.1.6) from all other computers at 10.1.10.1 I cannot connect to 192.168.1.6 and when I try to ping it, I get "no response from 192.168.1.2". It changes the ip address. Can anyone help with this? Thanks
0
All my routers in the IS-IS topology are level 2 and in the same area.
What would be a benefit when I would move all routers 1 and 5 to a different area?
Would is cut down on flooding LSP’s
Please advice.
IS-IS-Topology.jpg
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Hello Experts,

We are facing a weird issue with our Cisco 2504 WLC. The time goes to default after hard reset and then APs are unable to join to controller

I have also tried configuring NTP on WLC but the issue still remains the same.

Kindly advise to resolve this issue. Appreciating any help and suggestions
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I have a Win server with a nic which has two IP4 addresses -- 10.2.5.20 and 10.2.5.100. Both are in the same subnet. The question is, while I go to its properties, I can only see 10.2.5.20 and am not able to see the other in the Advanced area. Where is the other IP 10.2.5.100 defined ? (Please refer to the screen shots as attached.)
Thank you.
one-nic-two-ips.png
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When is adding the additional complexity and additional potential issues outweighted by the abstraction and other advantages of EVPN? Also if you could note the major advantages of EVPN - much appreciated. When is the juice worth the squeeze?
0
I have a url with
financeuat.testarea.njcccrt:8888
what does the 8888 represent?
0
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I have a hsrp configured with tracking on both r1 and r2. r2 is the primary (see diagram). The issue that I have is when r0 gig0/1 goes down, hsrp is working as r2 will go on standby. But sw1 still goes to r2 before r1. I'd like to send sw1 traffic directly to r1. Do I need to do tracking on sw1 as well? If yes, what do I track? Thx

net diagram

R2:
track 1 interface gig0/0  line-protocol
 
interface gig0/1.10
 encapsulation dot1Q 10 
 ip address 10.10.10.2 255.255.255.0
 standby 0 ip 10.10.10.100
 standby 0 timers 5 15
 standby 0 priority 110
 standby 0 preempt
 standby 0 track 1 decrement 20

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R1:
track 1 interface gig0/0  line-protocol
 
interface gig0/1.10
 encapsulation dot1Q 10 
 ip address 10.10.10.1 255.255.255.0
 standby 0 ip 10.10.10.100
 standby 0 timers 5 15
 standby 0 priority 105
 standby 0 preempt
 standby 0 track 1 decrement 20

Open in new window

0
I'm a database developer that inherited and managing an environment, we recently got disconnected from our parent company.

Anyway we got couple of ESX servers, physical servers and we're having issues with the DHCP, no IP leases has been going on, we were attached to their DHCP, if I connect any PCs directly we get a lease, but not behind or over our switch.

what should I look for? Anyone can help please? I added Ip-Helper on the Vlan 90 but still no luck, doing a wireshark can only show dhcp discover messages, nothing else!

main DHCP on ESX on a different subnet 10.35.2.x, clients are on 10.35.9.X, I've created another physical DHCP server on 10.35.9.X but same issue when plugged to the main switch, but it 'd lease IPs if plugged in a desktop switch with couple of clients. yes I can ping any DHCP from 10.35.2.x and 10.35.9.x with no issues.

thanks Jason
3750-config-latest.txt
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Hi all,
 i install nfs v4 in centos  7, i can mount a xport in another machine,
i searched for add user for nfs v4 for access to nfs exports, but i dont not found.

can you  help me, Please?

Thanks,
0
I am using port 1433 to access SQL server. But I heard it is not safe and should use a non-standard port.

What is non-standard port? Is that any range for that?
Why is it very safe? What is the best-recommended port to use?
0
We have 5 file servers in 5 different city locations all set up to replicate using DFS. We had a network outage for two full days at one location while people were writing to their local file server. The network is back up but I need to know how to check and see if there were any conflicts and then resolve these conflicts. I am the IT manager and DFS was set up before I got here and I'm just not familiar enough with it to know how I would proceed.
0
I have 2 servers that one is used for backups, and the others is a server that the files from our SAN get copied to for backups.  I want to connect the 2 servers together using a crossover cable, but the server still have to be able to get out to the internet.  Each server has 2 NICs.

What do I need to enable on the NIC properties that the crossover cable is plugged into so it will not conflict with the other NIC?
What else do I need to do?

They are PowerEdge 2900
Running Server 2012 R2 Datacenter
NICs are - Broadcom NetXtreme (The build in ones)

Thank you
0

Networking Protocols

11K

Solutions

15

Articles & Videos

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.