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Can Nginx pass through PROXY protocol destination address/port?

We have Nginx running as a TCP proxy configured to receive PROXY protocol data from a downstream load balancer and send PROXY protocol data to an upstream server: stream { server { listen ...
dippynark's user avatar
  • 242
0 votes
1 answer
411 views

MAC Address of VPN Client Keeps Changing

We have a desktop using Windows 10 at a remote location, and that pc has a printer connected to it. We use the Windows 10 VPN client to connect to the router of the local office (peplink 20) and once ...
Barry's user avatar
  • 11
4 votes
1 answer
10k views

How can I set a specific IP range for NFS exports file?

For example, I want to set an allowed IP range from 192.168.0.12 to 192.168.0.20. Would it require me to input all the IP addresses on that one line? Or is there an easier way to set this specific ...
RJoshOP277's user avatar
0 votes
2 answers
1k views

Sieve: Filter Rules

I want to implement a rule as follows: If "To" comprises only addresses having "*@example.com" -> discard Otherwise -> keep In other words: If "To" comprises at ...
Ralph's user avatar
  • 1
0 votes
1 answer
706 views

Connecting Computers accross different subnets or IP addresses

I have a setup that involves: Cable modem/router at 192.168.10.1 Wireless Router 1 at 192.168.20.1 Wireless Router 2 at 192.168.30.1 The wireless router are connected to the Cable Modem via the WAN ...
Chris's user avatar
  • 1
0 votes
2 answers
2k views

Static public IP address + OpenVPN + Setup

Grettings, I'm trying to figure out a way to make things work. Basically, my coworker needs an access to our client's backend dashboard and to get access they need to whitelist our public IP. Since we ...
dongogongo's user avatar
0 votes
1 answer
745 views

pfsense OpenVPN client address issue

First VPN client works like a charm (tunnel is 192.168.104.0/24 -> 192.168.104.2 assigned). But once another client logs on an identical IP is assigned. It looks there is no address pool to be defined!...
Reiny's user avatar
  • 1
0 votes
3 answers
151 views

using 192.170.130/24 as a subnet on the LAN

We have a client who has a 192.170.130/24 subnet on their LAN, which is being NATed to the WAN IP address from their ISP. Is this a good idea or should they be using an RFC1918 addresses on their LAN? ...
user242114's user avatar
0 votes
1 answer
66 views

Where is email delivered if the domain on a shared IP has A record but does not have MX records?

Some say that an mail server can deliver email to the IP address where the domain is pointed to by A record even if the domain does not have corresponding MX records, though it is not recommended. ...
t7e's user avatar
  • 171
1 vote
3 answers
11k views

In IPv4 Subnets - a /23 - How do we know which range to use? [duplicate]

Let's assume I don't know what my IP range is, or my default gateway, but I know my IP address is 192.168.5.38 and my CIDR Range is /23. How do I know what my IP range is? Is my range 192.168.4.0-...
Chris S's user avatar
  • 113
-3 votes
1 answer
20k views

Finding the first and the last address for a given IP address [duplicate]

It is small question, but I can't figure out these things. Please help me in simply way how to do this. Consider the given ip address is 198.51.100.39/28. From this how can I found the first ,last ...
Bewani Anuththara's user avatar
0 votes
2 answers
580 views

carp single wan address

I try to put in place 2 freebsd routers with carp interfaces. since I have only one wan address, lets say : 1.2.3.4 I'd like to use private range ips to do carp jobs : 10.0.0.1(router1) alias (1.2.3....
goddard's user avatar
4 votes
1 answer
761 views

Why do servers not accept email address comments?

According to Wikipedia Email addresses can contain comments in parentheses like john.smith(comment)@example.com. I tried to send out some mails to valid Email addresses using such comments using ...
John Smith's user avatar
-1 votes
1 answer
469 views

Finding out the physical port number of a Network device with java

I would like to find out the physical port number (the connector itself!) of a Router where a series of devices are connected to. Finding their IP and MAC is not issue at all. Let's say, finding out ...
Paul Efford's user avatar
0 votes
2 answers
1k views

Allied telesis 950 series switch , how can i see connected devices' mac adress ? mac adress table

i have Allied telesis 950/48 series switch how can i see connected devices' mac adress or mac adress table
Gurhan Goktas's user avatar
0 votes
1 answer
2k views

Map IP addresses to ports on switch? HP 2530-24G J9776A

We are trying to inventory incoming stock (used Mac computers) and are using Deploystudio and a special script. One of the conditions of the script and the database system is that each incoming ...
William Lombard's user avatar
2 votes
1 answer
713 views

Change scale set virtual network default address 10.0.0.0/16

By default, when creating a scale set through the Azure Portal, that scale set has a a virtual Network with the default address 10.0.0.0/16, even if you are already using that Network for other ...
Nick's user avatar
  • 21
1 vote
1 answer
572 views

Primary Smtp Address valid format for New-Mailbox cmdlet

I am writing simple application that utilizes the New-Mailbox cmdlet. One of parameters that is set is PrimarySmtpAddress. Provided Smtp address must be valid, otherwise the call will fail. I was ...
user avatar
1 vote
2 answers
613 views

One IP address with multiple nat servers on one domain

Is it possible to use one domain to connect with servers in NAT? Example example.ltd - > 12.12.12.12 nat1.example.ltd - > 12.12.12.12 - > 192.168.1.100 nat2.example.ltd - > 12.12.12.12 - ...
typedefex's user avatar
1 vote
1 answer
202 views

Dynamic IP address to Domain

A camera when connected to a DHCP Network receives an IP address. Using IP lookup I find the IP address of the camera. Then I type the camera IP address in a browser - it shows a website (index.html) ...
Bluesky's user avatar
  • 19
0 votes
1 answer
599 views

How to find out from which switch is coming the exact MAC address

I am working on a big company with 2 Backbone routers (ARS9K) and 200+ switches (Cisco, D-link, Tp-Link and etc.). Lets say that I know an exact MAC address of a device, but I do not know to which of ...
Zaur Aliyev's user avatar
2 votes
1 answer
42k views

POSTFIX: Sender address rejected: Domain not found (in reply to MAIL FROM command)

My mail server not recognize $mydestination, why? sproxy:/var/spool/mail # tail -f /var/log/mail | grep vinicius.lehmann Oct 6 11:13:21 sproxy amavis[31008]: (31008-17) Passed CLEAN {RelayedInternal}...
viniciuslehmann's user avatar
0 votes
1 answer
3k views

My Website Loads Really Slow Using Domain Name, But Fast Using IP

Only fixed line ISP is affected. Others OK. Anyone knows where to start to detect the problem?. DNS Checked using DIG TRACERT NSLOOKUP WHOIS all OK. is there anything i need to check at my hosting ...
Hackle's user avatar
  • 23
5 votes
2 answers
14k views

How to get public IPs on ESXi VMs?

We have a dedicated server with a hosting provider. We are running ESXi 6.0. The server has a single public IP which is currently being used for the management interface. The provider has also ...
user avatar
1 vote
2 answers
52k views

First and last IP address of the network 192.168.176.0/23 (subnet 23) [duplicate]

Let's have the following address of the network: 192.168.176.0/23. What are the first and last IP addresses of this network? Following this answer https://serverfault.com/a/327782/288201 I assume ...
zus's user avatar
  • 23
0 votes
1 answer
1k views

Is There a Way to Change the From Address in Exchange 2010 WITHOUT Using an Edge Transport?

I'm setting up some general emails for my company ([email protected] and the like), so we can print flyers and such and not worry about turnover. [I'm actually using mail-enabled Public Folders, ...
techgirl's user avatar
3 votes
2 answers
3k views

How to disable temporary IPv6 address in win7?

I found that the IPv6 link local address was generated randomly in Windows 7, not following the EUI-64 standard. Then I found this link and followed its guide: netsh interface ipv6 set global ...
Frank's user avatar
  • 33
-6 votes
1 answer
50 views

What if you set your static IP to that of Google? [closed]

What prevents someone from setting their static IP to that of another server such as Google's servers? How is that prevented?
Justin Hou's user avatar
0 votes
1 answer
52 views

Why is linux not listing the IP I want?

I have a linux based cluster (using openMosix). The machine intended to be used as a server has 2 network cards. Cluster is working, and all machines ping to each other inside the cluster (internal ...
Stan Mash's user avatar
2 votes
1 answer
760 views

Postfix replaces "from" when using simple filtering

I'm trying to configure Postfix (on a RHEL 6.5) to modify the content of incoming messages and forward the emails to a remote server. I used a Perl script piped to Postfix to modify the content, and ...
Andrea's user avatar
  • 23
1 vote
2 answers
7k views

Why my website is not accessible with the www prefix

I know this is an old, and "amateur" question but I see myself in the need of making this question since I truly don't know whats going on. My website is not accessible with the www prefix... ...
adelriosantiago's user avatar
1 vote
0 answers
946 views

How to change SAS address on Expander

I have the following setup - two supermicro backplane attached to one controller LSI SAS 9207-4i4e and unfortunately cannot access the disks, during boot there are disks only in one backplane, the ...
neoX's user avatar
  • 141
-3 votes
2 answers
3k views

Linux Find Mac of IP address that connects to server [closed]

On Linux , How Can Find Mac of IP addreass of any user / computer that connected to server ? we use Centos + Iptables .
Pardis's user avatar
  • 1
5 votes
2 answers
43k views

What are the IPv6 Public and Private and Reserved ranges [duplicate]

I just want to know what are all the public IPv6 ranges which ISPs or other users can use? Also need a list of addresses which can be used in private networks and also the list of addresses which ...
Vipin raj's user avatar
0 votes
2 answers
57 views

Session automatically resolving to secondary IP

I am using Debian 6 - 64-bit and this is what my /etc/network/interfaces file looks like auto eth0 iface eth0 inet static address PrimaryIP gateway X.X.X.X netmask 255.255.255.0 auto eth0:...
Asad Moeen's user avatar
0 votes
5 answers
469 views

Moved IP addresses to other server, no network internally anymore

I have had this server set-up: serverA ip 200.200.200.100 ip 200.200.200.101 ip 200.200.200.102 ip 200.200.200.103 Due to circumstances, I had to move away ip 200.200.200.102 and 200.200.200.103 ...
Dirk de Boer's user avatar
1 vote
1 answer
572 views

How to block outgoing traffic of the mac address of one of the server's own NIC with ip tables?

i have a server with 5 nics connected to a switch, and running GNS3 (cisco router emulator). I need to block, in the server, the packets originated by the nics at layer 2 level (the nics are not ...
Bartoluz's user avatar
2 votes
1 answer
166 views

How can I deny a bind lookup on a single IP address?

I am running a BIND installation as a simple RBL server. The problem I am running in to is that if I have listed a block of IP addresses like: *.0.0.10.rbl.mydomain.net. IN A 127.0....
user162910's user avatar
0 votes
2 answers
287 views

Assigning a static IP address to DHCP network

I would like to add a static IP address to computer on a DHCP network. If I reserve an IP address for this computer does this result in a static IP address?
Ivan Carrasquillo's user avatar
1 vote
1 answer
389 views

Add IP addresses on CentOS 6

I have a 12 IPv4 addresses that I need to add to a CentOS 6.3 machine however those 12 IPs are spread out among 3 different subnets. I know how to add additional IPs when they are on the same subnet, ...
user1710563's user avatar
0 votes
3 answers
2k views

MAC Address Changed?

I was wondering if the following MAC address is a valid one? 00:13:74:00:00:00 We have an automated network registration on the system whereby users can plug in their computers and register on the ...
user1013264's user avatar
-3 votes
2 answers
200 views

Changing the IP address with a name [closed]

I have a web server (xampp) in a particular PC running on my LAN, and I added the following line in the 'hosts' file : 127.0.0.1 mysite. Then, in another PC connected to the LAN, I'm trying to ...
fede's user avatar
  • 1
1 vote
1 answer
2k views

Rebooting a guest causes IP address conflict

We've been having issues while setting up a vSphere cluster, using 7 ESXi hosts, and running about 74 guests that are amongst the mess. Our issue is that when we reboot a guest, Windows or Linux, ...
Eirik W Toft's user avatar
-1 votes
1 answer
4k views

Multiple IP addresses in wireshark show the same mac address. What's going on?

I'm seeing an issue with a computer (running an embedded OS) transmitting over a network to an XP embedded machine. The computer has 10 physical ethernet ports, 9 of which are on this network. I ...
user avatar
0 votes
2 answers
917 views

Local Network Windows Port Address Translation

We have many legacy applications that can only send reports via printing. We have an application called RPM that can receive these print jobs and convert them to a more useful medium (e.g. PDF ...
obsidian's user avatar
  • 194
-4 votes
2 answers
2k views

Getting IP addresses through sniffing [closed]

Is it possible to know the gateway address of a wireless AP that I'm not connected to through sniffing? Airodump-ng can show MAC addresses of the AP and the clients associated but doesn't show IP ...
Basil's user avatar
  • 1
0 votes
2 answers
63 views

Setting http://domain and http://ip to show different directories

Can someone tell me what httpd.conf settings I need to acomplish this? When in browser I access http://IP I want to show: /var/www/html/ And when I access http://domain I want to show /var/www/html/...
adrianTNT's user avatar
  • 1,169
0 votes
1 answer
716 views

How to enable DHCP address release with dhclient

We have a subnet with a couple of hundred virtual machines that: boot up do some short heavy computational task and shut down. The average life of a vm here is about 20 minutes. It's critical that ...
Liudmil Mitev's user avatar
0 votes
1 answer
1k views

Postfix connection cache / address verification probes

Is Postfix connection cache also applicable for address verification probes? My setup of 2 frontends with 1 backend sometimes runs into trouble under high load. Frontends verify recipients on the ...
riha's user avatar
  • 418
2 votes
3 answers
22k views

IP address of virtual server?

I have a virtual server (shared hosting), with a domain name (and several sub-accounts, each one a separate site also with its own domain name) I was wondering if there was a way to find out the IP ...
Mark's user avatar
  • 23