Network – Hyper-V Server 2016: IP addresses for VMs in a VLAN set up with IP Helpers can not be retrieved automatically

I'm pretty new to this whole thing, so I apologize if my understanding of virtual networking lacks something.

I have a Hyper-V cluster (Server 2016) and want to be able to configure VMs that I have set up in this cluster via DHCP. I'm using an external Vswitch set up with a specific VLAN ID with these VMs. This particular VLAN is set up with a DHCP scope and IP utilities.

The problem is that these VMs do not automatically fetch IP addresses even after DHCP has been enabled on them. I can manually assign IP addresses from this subnet and they work fine, but the VMs will not just "grab" them. If I do not manually assign an IP address from this range, it will be assigned only the APIPA address. Again, the subnet is set up with IP helpers, so I theoretically do not have to set up a DHCP server in this VLAN (or at least that's how I understand it).

What would you suggest next? Or what additional information can I provide?

Many Thanks!

Increased burglary attempts from the Iranian IP space after the incident with US drones.

Most crimes currently appear to be due to:

AS209128 – SPEEDY INTERNET LIMITED.
AS49596 – Fara Negar Pardaz Noor Khuzestan Co.JSP

One of the most offensive blocks (185.137.111.0/24) was mentioned last month in this thread before the new malicious activity.

https://www.lowendtalk.com/discussio…-from-aio-ipv4

The activity can be confirmed by third parties with abuseipdb.

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Rating: 5

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Postfix – blocking by sender E-Mail Domain IP

For some time I have received many spam emails. The emails are all different, but when I look up the domain of the email address, it always resolves to the same IP address.

So:

  • xyz@domain1.tld -> will be resolved to 80.249.161.131
  • ddfda@domain2.tld -> will be resolved to 80.249.161.131
  • etc.

In Postfix I can reject any email address, but in this case this is not helpful because the email address is constantly changing.

The next problem I have is that every email is sent through another mail server. So I can not lock by sender address.

I would like to block an email with the IP address. Not the name of the sender, but the IP address of the domain used in the e-mail.

Any suggestions on how to do that in Postfix?

.net – Retrieve client IP address that is not spoofed

Of course, this only applies to HTTP, because it is an HTTP header.

It is also based on a proxy server that does not try to hide that it is a proxy server. It does not work with clients using VPN. It does not work for clients that use a proxy that does not display itself. It does not work for clients who set up a TLS session CONNECT via a proxy.

In short, it does not provide real security but may be useful for statistical purposes or the like. It's like politely asking the client who he is and expecting him to respond truthfully.

You can rest assured that REMOTE_ADDR is the host that actually sends you the traffic. This is essentially ensured by the three-way handshake of TCP / IP.

You can not be sure who prompted the remote address to connect. You can not be sure if this remote host is a VPN terminator. You can not know if it's a proxy. You can not tell if it's part of a botnet.

Privacy – If you use a shared / public VPN, can other users with the same IP address log in to your accounts?

I know that browsers use cookies. For example, if I log in to Facebook on a public computer and forget to log out, the next person opening a new browser can switch to my account.

This works the same way for shared VPNs, especially sites that are not https? Can someone on the same VPN network tap your traffic and cookies to gain access to your private accounts?

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We have THREE servers at this location with a clean 1 x 22 available. These are available for shoe stores, cockroaches, or similar purposes that need this geographic location for latency purposes. These will be sold subject to availability. No tests may be performed before purchase. If you have set up your own server, LOAs are also available (term commit). Your final IPv4 price depends on the RIR, allocation size, runtime commitment, and the quality of IPs you need. NOTE: WE HAVE / 24 – / 16 OVER ALL REGIONS. YOUR FINAL PRICE IS DETERMINED BY THE QUALITY OF IPV4 YOU NEED (ie, clean compared to the one used), the TERM COMMIT, the ASSIGNMENT SIZE, the prepayment, and the REGION (ie, Reif, cheaper than Arin).

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====================================== === ==========

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– 193.xxx.xx.0 / 23
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– 193.xx.xx.0 / 23
– 37.xxx.xxx.0 / 23
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– 193.xxx.xx.0 / 23
– 194.xxx.xx.0 / 23
– 80.xx.xx.0 / 23
– 193.xx.xx.0 / 23
– 37.xxx.xxx.0 / 23
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We have ONE server with this mixed bag of RIPE assortments. This is the perfect solution for a SEO, VPN or proxy web hosting company looking for mixed long-term CIDR clean areas. The ranges are delivered on a server and are based on the US .. server upgrades, which are available at an additional cost. These are sold as a package, so you should take ALL. We are not interested in separating them if we can find a good customer for them.

====================================== === ==========

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Operating system: CentOS 6.6 x 64bit
Port 25 / SMTP traffic blocked by default
Basic management

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====================================== === ==========
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======================================= == ===========

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Port 25 / SMTP traffic blocked by default
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Port 25 / SMTP traffic blocked by default
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======================================= == ===========

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======================================= == ===========

SERVER ORDERS:
you Got to consist Pre-screen at registration to be eligible for the service. When you sign up for a proxy, VPN, or use information that does not match your geoip, you are often flagged as a possible fraud in the billing software and your order is rejected. In addition, some orders have been received requiring manual review based on the MaxMind and FraudRecord rating prior to final approval. The delivery time is usually 48 to 72 business hours from receipt of payment, depending on the hardware and the complexity of the IPv4 network.

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We can also assign SWIP and update GEOIP via MaxMind / Databases for your locations.

======================================= == ===========

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nmap – I've done an IP scan on a network and I can see that the IP address can be scanned, but I can not ping the device

I made a change to a serial to ethernet converter, and the device is no longer pingable or accessible through the web interface. However, when I perform an IP scan, NMAP makes this change as follows:

Nmap Scan report for 192.168.0.10
The host is active (0.00069s latency).
All 1000 scanned ports on 192.168.0.10 are filtered
MAC Address: 00: 90: E8: 73: 1F: 16 ​​(Moxa Technologies)

Says the host is active, but I can not connect? Is this just cached? or I miss something here

amazon web services – What public IP address does an instance run in a private VPC in AWS?

One of my instances in a private VPC in AWS is sending requests to an API (to get some metadata). The API provider requests an IP address for the whitelist.

I am not sure which IP address to provide, because the instance is part of an automatic scale group. It does have an ENI IP, but I'm not sure if this is the IP needed for the whitelist. Could it be the NAT gateway IP (since the instances use a NAT gateway to connect to the Internet)?