Questions tagged [relay]

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51 views

postfix in docker cannot resolve hostname of relay host

My postfix instance running in a docker container seems to be unable to resolve the hostname of my relay which is outbound.mailhop.org (formerly Oracle and now owned by DuoCircle). Relay fails with ...
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0answers
39 views

Port forwarding and triggering and so called Relay connection for NAS devices

After reading some questions and answers about Port Forwarding and triggering I feel a question. My question scenario: It seems that my ISP has provided a private IP for internet service at home ...
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2answers
53 views

UPS on DC lines [closed]

How could a UPS switch between battery and AC wall socket fast from around 4 ms to 12 ms. What make it especial to switch in that very low time. As far as I know it has relays inside it to perform the ...
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0answers
6 views

IIS 7.5 SMTP Relay - sends held mail when stopping

I get a periodic build up of mail in the queue folder of my SMTP relay. For the most part email flow is fine. When I stop the SMTP service the held mail gets sent rather than when it starts. Anyone ...
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1answer
144 views

Zero-config HTTP relay server

I develop a desktop product (C#) that has a built-in Web server (ServiceStack) that can be used for remote management of the database - I will refer to this as the Internal Server. Many users want to ...
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1answer
150 views

What are my best option(s) if desiring to tunnel/reverse-proxy to-and-from a telnet server?

I have a quite small VPS abroad, and a BBS telnet server software that i wish to run locally. What are my options, If i wish to only use the VPS as a relay for connections, effectively and ...
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1answer
874 views

How to configure a Linux DHCP server when behing a DHCP relay?

Considere the following: How can I configure my DHCP server (isc-dhcp-server package on ubuntu) to feed addresses for 172.16.0.0/18 subnet as it does not has any interface in that subnet? I tried to ...
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0answers
27 views

How to setup two Linux VPS servers to act as a traffic/data relay

I have two VPS servers running Ubuntu located in different regions. How can I utilize these two servers to act as a data relay, shown in this diagram: Client --> VPS1 ----> VPS2 ----> Internet So ...
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1answer
103 views

Transistor to disconnect Ethernet connection

An old notebook I found in the basement always tries to boot from the network as I start it. Unfortunately I've forgotten the BIOS password. I figured out that one USB port delivers power until ...
1
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1answer
91 views

Postfix: relay but with sender's address

I have postfix configured now that incoming emails (catch-all) are sent immediately to a specific email on GMail. However I don't see the original sender's address in received emails. What I am ...
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0answers
1k views

How can I set different From Email to office365 postfix smtp relay?

I have configured the office365 postfix SMTP relay but If I didn't have the same email address I used to authenticate, my mail fails. How can I send from a different email address? Say like my ...
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0answers
53 views

How to access to the router for advanced configuration?

everyone. I brought a router which is Huawei WS318 recently and I want to make it as a DHCP relay. But I couldn't find the advanced setting on web page.So I decide to use CLI. However I couldn't ...
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1answer
1k views

I'm stuck with postfix on debian: 554 5.7.1 Relay access denied

I'm really stuck with a problem on my postfix installation for a few days ago. I know there is a lot of stuff about this on the net, but none of what I tried worked. Here is my problem: I can send ...
2
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2answers
111 views

Setting up a SMTP relay that goes back and forth

I have a Postfix SMTP server running at home which can't send or receive mails because of an ISP restriction. (no incoming port 25, nor outgoing) I have a VPS with a public IP that I want to use to ...
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0answers
64 views

Can the DHCP relay agent use the DHCP offer IP's subnet to shrink switch flood domain?

I was wondering whether once the DHCP offer made by the DHCP server arrives at the DHCP relay agent, the relay agent is able to (assuming the network has one VLAN per subnet): examine the DHCP ...
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1answer
249 views

Port forward traffic from restricted network with home unrestricted

Here is the scenario: I have an enterprise e-mail whose SMTP server listens on port 2525. I can configure an e-mail client like thunderbird in my home without any problem. I also have another job, ...
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1answer
1k views

Disconnect USB device without unplugging and reattaching

I have a IRTOY bought from dangerousprototypes. I run it in windows 7 x64 with WinLirc 0.9c. But sometimes the devices just hangs all of a sudden and I need to remove and reattach it to make it work ...
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0answers
73 views

Is it possible that a hardware device change the response info to the same IP?

I am building a relay server for a game and wanted to make it work in most situations. The host and clients will connect to the relay server that works as a middle man. Basic info: The relay server (...
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2answers
2k views

Relaying a stream from OBS to multiple sites at once

I've searching a lot about this on OBS Studio forums, but the only answer I've got was: "Use restream.io". The problem is restream charges for Facebook relay, and I can't rent this service at this ...
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1answer
668 views

Postfix Relay Based on Sender Recepient

What is the best practice when one has to implement this sort of ruleset in Postfix? Email sent from local domain1.com, domain2.com to example.com, example1.com ought to be relayed to smtp.external....
3
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2answers
3k views

D-Link DGS-1210 DHCP Relay Option 82

I'm having problems with DHCP relay (option 82) on a DGS-1210-10 switch. The configuration is: Port 1-8 is untagged VLAN 80 (this is also PVID) Port 9 and 10 are tagged VLAN 80 and 99 (where 99 is my ...
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0answers
996 views

Prevent Office365 mail exchange from being an open relay

I wish to use Office365 as a mail exchange for my server. It will have a single account - support@example.com and I will log in to the Office365 website to see all emails sent to this email address. I ...
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1answer
167 views

Any way to power a 5V relay with software?

I have a relay that can be powered by a 5V output and I'm trying to power it in software on a PC motherboard. Question: How to I get a 5V output from any part of the motherboard (prefferable ...
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1answer
50 views

Internet Accessible Private Cloud

I am attempting to setup a private cloud server (using a Debian VM) that is accessible to myself and a few friends over the internet. I have a domain name, however I do not have a public IP or access ...
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1answer
58 views

Closing off site for external mail connections

A client of mine has a linux/cpanel based web server (VPS), which at some point in the past was also the primary mail server for the domain. It is no longer receiving mail (MX records were changed to ...
1
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1answer
529 views

postfix redirect mail to transport going round relayhost

I have worked correctly postfix with this setting: main.cf smtp_sender_dependent_authentication = yes sender_dependent_relayhost_maps = hash:/etc/postfix/relayhost_map transport_maps = hash:/etc/...
1
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1answer
879 views

SMTP relay options

I work from home and use an email client for all my work email. Up until yesterday, I was able to use my ISPs SMTP server (Verizon FiOS) to send my work-related email with any from-address I liked as ...
1
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1answer
748 views

Block and char device over network on linux

It there a generic way to share a block or character device over network? All related questions solved with specific answer like: if you want to share disk between host, use NFS, SMB, iSCSI, or AoE. ...
2
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0answers
743 views

How to set up a sendmail relay using HP-UX 11.x

I need to setup and HP-UX 11.23 system as a mail relay to collect mail from other internal HP-UX servers and relay them to the MS Excahnge operated smtp relay for delivering internet bound mail to the ...
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1answer
566 views

TCP server listen and client listen windows software

I am using Windows OS on an amazon cloud AWS with static public IP. On this machine I need to set up a TCP server to listen on port 2204 for raw data that will arrive from a GPS base station over TCP ...
0
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1answer
510 views

Server 2008 VPN isn't working, DHCP coming from a different source

Alright, I have a Windows 2008 server running. It serves up DNS but not DHCP. I want to have VPN running on it, and my understanding is that you can do this as long as you set the DHCP relay server ...
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0answers
568 views

Duplicate and relay mail from postfix

We currently use Google Mail for our teams email. We want to move to a self-hosted email server. Some of our team members prefer using Google Mails interface and asked if we could continue having ...
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1answer
6k views

Can't send email to the internet from Postfix mail server. (Relay access denied)

I have a mail server running Postfix in my LAN with which I can send and receive emails in my LAN and send from the WAN to the LAN. I can't send from the LAN to the WAN though. I am trying to use my ...
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1answer
2k views

Postfix Relay Based on Recepient

What is the best practice when one has to implement this sort of ruleset in postfix: Email sent to a@example.com, b@example.com, etc ought to be relayed to smtp.a.example.com. Email sent to everyone ...
1
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0answers
919 views

Sendmail local domain relay

Sendmail on webserver.mydomain.com is sending all emails properly except email addressed to anyone@mydomain.com. mydomain.com's mail is not handled locally and mx records are configured to point to ...
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4answers
8k views

Disconnecting a USB device without unplugging it

I'm modifying my desktop computer case and I want to plug everything into the USB ports in the back of it. However, the ports are not easy to reach and sometimes I have to unplug some devices because ...
0
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1answer
116 views

usb receive message when relay is triggered?

is there a device that, say when a device like a dryer motor turns on, it triggers a relay. the relay trip is measured by a usb device of some sort, then a message is displayed in a program? i'm not ...
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2answers
326 views

Does Tor need more Relay node or Exit nodes? [closed]

If I have free bandwidth, am I better off sharing as a relay node or exit node? Trying to help the Tor network
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1answer
115 views

tor relay - how to display remaining bandwith quota?

I have a noobish question. I am experimenting with tor and would like to offer a relay service without exit node. My relay goes into hibernation surprisingly fast (inspite of setting AccountingMax ...
1
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1answer
733 views

Gmail relay will not email account on its own domain (google apps)

I am running sendmail on Ubuntu. I've configured it all as normal to relay email via my Google apps server. I have another account on a ubuntu VM that works just fine and it can email itself etc. I ...
3
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1answer
173 views

Is there such a thing as a USB-controllable USB relay?

I am looking for a device that connects to two USB ports on a computer: a "Control" port, and a "Data" port. Both cords go to the same device, which also has one USB "out" port (3 ports total). If a ...
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0answers
5k views

Relay mail to external domains through external SMTP in Exchange 2010

I have an internal Exchange 2010 (sp2) server setup for some development projects. The domain is called dev.net. All users inside dev.net can reach and email eachother but I'd also like to be able to ...
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1answer
2k views

ssmtp for windows

I have the following problem with a software that should do mail notification for a biometric entry system: the software does currently only support SMTP over port 25 without TLS/SSL. Which is bad ...
5
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2answers
4k views

automatically encrypt and decrypt emails using gnupg (gpgrelay for unix)

My point of view related to email security is: whenever possible emails should be protected with PGP/GPG while transporting, but it doesn't have sense to store encrypted emails in local mailbox (this ...
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0answers
265 views

Setting up Relays in Windows

I'm trying to setup a pivoting relay with netcat on Windows, replicating a scenario easily possible by using pipes in Linux. Assume machine A can route to machine B and machine B can route to ...
5
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1answer
2k views

Using sendmail over SSH

I have a SSH access to the server with working sendmail provided by my hoster. I want to configure my local sendmail to use remote server as a relay. How can I do that? Is it posiible at all? Note: I ...
3
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0answers
3k views

Setting up a local RTMP Relay

I'm trying to live stream an online game, but I lag, so what I'm trying to do is find a way to setup my live stream client which lets me specify a custom RTMP server to connect to another computer ...
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3answers
2k views

Connect through own TOR relay, make edge node traffic unreadable

I understand that one of the limitations of TOR is that whoever runs the edge node can read all the traffic running through it before it gets split up amongst the TOR cloud. Lets say you were an ...
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4answers
8k views

How can I use an Asus WL-520GC router as a bridge/repeater?

I live in a shared accommodation with one Internet connection, which is shared to multiple PC's though a wireless network. Because the wireless router is at one end of the house and my room is at the ...
9
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2answers
26k views

What does “relayed connection” mean?

I've seen this when receiving files over skype, and some other situations, but I don't know what it means.