iphone 6
verizon united states cell phone

how can I forward all calls to another phone number

do I need to use verizon or can I use iphone (no jailbreak. I dont want viruses or errors with jailbreak).

what happens at every step of our network model, when a node on one network establishes a TCP connection with a node on another network. You can assume that the two networks are both connected to the same router...... how it works?

Striggling with dhcp on linux.  
Need to know scope range, reservations, lease hours/days, % scope used, etc.

Here is what I have:   can can you take  apeek and help with commands?

# File managed by Chef

# set this to store vendor strings.
set vendor-string = option vendor-class-identifier;

allow booting;
allow bootp;
allow unknown-clients;
allow client-updates;

authoritative ;
ddns-domainname "corp.companyname.com.";
ddns-update-style interim;
ddns-updates on;
default-lease-time 6400;
filename "pxelinux.0";
max-lease-time 86400;
next-server 10.x.x.x;
one-lease-per-client true;
ping-check true;
update-static-leases true;

option domain-name "corp.companyname.com";
option domain-name-servers 10.x.x.x, 8.8.8.8;
option domain-search "corp.companyname.com", "i.companyname.com", "someothername";
option host-name  = binary-to-ascii (16, 8, "-", substring (hardware, 1, 6));




zone corp.companyname.com {
 primary 10.x.x.x;
 # uses name format could use IP address format
}
# zone 42.10.in-addr.arpa {
#  primary serverhostname;
# }

include "/etc/dhcp/groups.d/list.conf";
include "/etc/dhcp/subnets.d/list.conf";
include "/etc/dhcp/hosts.d/list.conf";
~                                                                                                                                          
~                                                                                                                                          
~     …

I can see in a packet X-Forwarded-For info such that I can see the original source
address of the packet sent to the front end of my load balancer. Now if I am using
wireshark and I only wanted to see packets with a specific x-forwarded-for value,
how could I do that?

When I go to the https://dmarcguide.globalcyberalliance.org/#/ website and type in the email domain name of my organization the SPF & DKIM results pass but for the DMARC test I receive a message that says "Thank you for getting started with DMARC. You are currently at the lowest level and receiving reports, which is a great starting point. Please make sure to review the reports, make the appropriate adjustments, and move to either quarantine or reject soon. Additional information about reporting tools can be found here" (see the second screenshot below).

When I click on here I am taken to this website https://dmarc.globalcyberalliance.org/dmarc-reporting-key-benefits-takeaways/.

What values do I need to change or what settings do I need to change within my external DNS server records so that I will pass the DMARC test for this globalcyberalliance.org website?

I currently have this TXT record setup within my public DNS records for DMARC:

_dmarc.domain.com.      3600      IN      TXT      "v=DMARC1; p=none; rua=mailto:postmaster@domain.com; ruf=mailto:postmaster@domain.com"


PLEASE NOTE: The actual domain name has been replaced with the word domain above and has been whited out in the screenshot for privacy purposes.

What is the correct Time to Live (TTL) value that an email domain's MX record should be set to?

I want an Button to form that will display my computer's IP address,, how can I do this? Thanks in advance.

Are other ISPs besides Comcast able to use Comcast's DNS server addresses of 75.75.75.75 & 75.75.76.76?

An organization I am working for has switched over to using Comcast fiber optics as its primary internet service provider (ISP). We also have a second internet service provider (Etheric Networks (https://ethericnetworks.com/) which provides satellite dish based internet services.

Our internet service is set up in a failover configuration using a SonicWALL TZ600 router so that if our primary Comcast fiber optic internet service fails then our internet service will automatically switch over to Etheric until the Comast fiber optic service is restored.

We would like to continue to use the static external DNS server addresses of 75.75.75.75 and 75.75.76.76 in place if our internet service ever switches over to Etheric should the Comcast fiber optic internet service become unavailable.

Our question is if our internet service switches over to using the Etheric internet service will the external IP DNS server addresses of 75.75.75.75 and 75.75.76.76 still be valid and provide timely DNS name resolution?

Or is there a different type of method we should be using to handle our internet service and DNS name resolution switch over?

I was reading as below

TCP - is a transport layer protocol. It works over an IP network
HTTP - is an application protocol. It works using TCP on an IP network

i was not clear. Does HTTP also uses HTTP
what other protocols there in networking.

nay good link, resources or free video tutorial to understand clearly these things?
please advise

my network is as follows:

Comcast 10.1.10.1

Sonic Wall - 10.1.10.2 (gateway 192.168.1.1)


Just double checking, I want the SonicWALL subnet to be private.  I am a little concerned because when I am on a workstation behind the sonic wall I can ping the Comcast gateway, and navigate to the admin portal.

However, when I am directly plugged into the Comcast gateway I cannot ping the 1.1 gateway subnet.  So the SonicWALL subnet is not visible to the main comcast network.  Is my network setup and secured as intended?

Hello Experts,

We have an application which is login on CentOS 6.8 64 bit (GUI Interface) & after login generate tcp port 50000 for make connection with user.
Behind that port there are many connection connected with different-different IP (192.168.207.11, 207.12, 207.13) & user name (user1, user2, user3):

Example Output:-
[root@CC ~]# lsof -i :50000
COMMAND    PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
TCPServer 3647 rajat  245u  IPv4 156532      0t0  TCP 192.168.207.125:50000->192.168.207.15:49277 (ESTABLISHED)
TCPServer 3647 rajat  261u  IPv4  23354      0t0  TCP *:50000 (LISTEN)
TCPServer 3647 rajat  387u  IPv4  24955      0t0  TCP 192.168.207.125:50000->192.168.207.13:49271 (ESTABLISHED)

From this cmd i only check which IP is connected behind port 50000, but i want to check user name also. Please suggest.

This morning when I got to work a couple of machines could not access the internet, including my own. The only common thing is that they have all got static IP addresses for RDC connections.

main subnet => 192.168.16.1/21
DHCP scope => 192.168.18.10 - 192.168.18.255

my static IP => 192.168.19.3

On the PC's which have a static address if i change them to DHCP everything works. If they are static they are not able to access anything external. Internal Sites work fine. DNS lookups work fine for both internal and external sites.

I have tried getting a dhcp address on my PC, then setting the exact same IP address manually and see the same restrictive behaviour. Everything was fine yesterday evening when we left, nothing has been changed. i cant see any updates have occurred. i have checked router settings and rebooted several times. still no joy.

Any Help would be appreciated.

Thanks

Michael

We use a service to route calls for our call center. There are about 100 call center agents and everyday, four or five will have trouble launching the soft phone application. We connect to the call manager and soft phone system via and MPLS.

Sometimes restarting the PC fixes it. Sometimes resetting the browser fixes it, sometimes disabling / re-enabling the NIC fixes it. Sometimes it magically fixes itself.

The attached packet capture image from Wireshark typifies what a TCP stream looks like from a PC experiencing  a failed application launch.

NOTE: In the attached file, the TCP RST flag is not always seen. Many times I only see the TCP re-transmissions or TCP SEQ Out Of Order.

Questions 1: Am I right to believe my problem is, either a reset is being thrown or the other side stops responding for some reason, hense the re-transmissions

Since this is over an MPLS, I am not able to get a capture from the other side.

Question 1. What troubleshooting steps should I take to identify why I am getting these re-transmission, and or Resets.

Question 2: Is it possible that some traffic might be routing out the MPLS, while other is getting lost in the network? If this were possible, and I wanted to capture the packets on the Switch, would I SPAN the both the interface connected to the PC and the Interface connected to the router, or just the router?

Note: I don't have trouble logging into the portal, I have trouble launching the softphone, which uses a browser …