Is there a way to add a specific Google calendar as a forwarding address in Gmail?

I wanted to create a filter in my Gmail account to forward specific calendar invitations that I receive to one of my other Google calendars (using its identifier @

Unfortunately, I can't add my Google Calendar as a forwarding address, because then Google sends an email with a verification code to that address and, of course, I can't access that email.

Is there any other way to get the same result?

port forwarding – SSH multiplexing hangs if it is not properly stopped

I am trying to configure remote access to my personal computer via SSH with multiplexing. Here is the configuration: from my laptop, I connect to a port on my modem; this port is forwarded to my router, which then forwards it to the local office and i authenticate myself with my key. Due to multiplexing, I can then open another connection to the home box without having to re-authenticate myself. It all works exactly as I expected.

However, a problem occurs when I restart the laptop. If I restart, I can no longer SSH in the startup box – trying to do so hangs a bit without asking me to authenticate, then expires.

I can fix the problem by restarting the welcome box (although this requires physical presence, which rather defeats the point). I can also avoid triggering the problem if I properly disconnect the SSH connection with ssh -O exit $IP -p $PORT.

Given the above, I have two questions: first, is this the expected behavior or have I encountered a bug? And, secondly, is there a way to avoid this problem? Thank you!

(This question is superficially similar to the configuration of the SSH multiplex timeout, but this The question concerns the restart / inaccessibility of the server while my question concerns the restart of the client without graciously signaling the end of the multiplexed connection.)

networking – Add iptables programmatically using Java for port forwarding

Is there a method (using the package or a protocol) that could be used by a Java-based client application in the intranet to map the port to the residential gateway iptable ( router) to allow access from the Internet? I noticed that a chat application could automatically add a range of ports to the router for port forwarding. I don't know if a pure Java application could do this or not. Or should you use libiptc + JNI to perform this function?

Disabling forwarding from one Gmail .edu to another Gmail doesn't work

For about a year, I forwarded emails from an .edu email address (the university uses the Gmail interface) to another gmail. The setup was a bit tricky – the transfer didn't work, I think I also had to activate IMAP from the sending email.

Now I do NOT want to transmit. I have disabled POP and IMAP in both accounts. The receiving email does not have the sending email listed in the Accounts & Imports tab. The sending email does not have the receiving email listed under Forwarding Addresses. I even checked other linked accounts to make sure emails are not sent from .edu addresses to another account and THEN to the recipient account. I have tried and checked these things over 3 weeks now, so should be enough time for any potential delays. Still, emails continue to arrive. Suggestions?

Lightning network daemon – LND port 9735 is still closed after configuring port forwarding and firewall

I have configured my full bitcoin / lnd node and would like to make it work as a routing node for the network. So I opened my port 9735 from the router and allowed access to it in my firewall (ufw on Ubuntu).

enter description of image here

Now, although my node is working and listening, my port still appears to be closed. I have had no problem establishing connections or opening channels with other nodes, but it seems that they cannot connect to me.

Here is also my bitcoin.conf and lnd.conf file:


# server=1 tells Bitcoin-Qt and bitcoind to accept JSON-RPC commands


# RPC server options


# Connection options

# Use only TOR for routing

# Long running Bitcoin Nodes on the Tor Network

# Verified Online Bitcoin nodes on the Tor Network from 

# Verified Online Bitcoin nodes on the Tor Network from 

# Verified Online Bitcoin nodes on the Tor Network from 

# Maintain a full index of historical transaction IDs
# Required by LND Server


; set external IP if not using NAT
; set node alias (seen in explorers)




https – External IP opens router control panel, can I configure port forwarding on port 80

My house is armed with a D-Link DIR-868L router and I am trying to host a website from my PC behind it on the local IP address port 32768 (which I can configure).

I tried to configure port forwarding and / or a "virtual server" on my router, where the "virtual server" approach seemed to do something. When configuring for external port 80, to my internal IP and (arbitrary) port 32768, I could access a simple website from the LAN via the external IP (in a browser) …, but i can't access it via WAN using external IP address.

Hosting a basic web page using python -m SimpleHTTPServer 32768

Virtual server configuration:
virtual server configuration

When I navigate to my external IP using 4G (by phone), I enter the router's configuration page. By doing the exact same thing over wifi (via laptop), I enter the site, as expected.


How can I get my router through communication from port 80 to my specific PC behind the router, so that my external IP translates to my website when you approach it via WAN?

Could it work like magic when you start using an SSL certificate and communicating via HTTPS port 443? It seems that the router only serves an HTTP configuration page (80) …

It was only 3 days ago that I tried to solve this problem and I told myself some networking skills, so I am very open to suggestions or lessons.

(Note, I already have a domain and an A-record DNS is currently directing my domain to my external IP)

network – Port forwarding using PF firewall on Mac Catalina

I am trying to forward packets from a game, but for some reason it does not work.

I have a pf.conf file that looks like this:

ext_if = "en0"
int_if = "lo0"
rdr pass on bridge0 inet proto tcp from any to any port 6112 -> port 6115

Then I run sudo pfctl -f ./pf.conf to apply the rules.

Then I use telnet 6112 to test the transfer, but it doesn't work (the same in Wireshark – always by connecting directly to the destination without going through

network – FritzBox 7560 Port Forwarding for IPSec Client VPN

Dear super-user community,

I have already given up connecting to my universitis vpn. They only support windows when using Ubuntu 16.04 lts. However, there was a Linux solution using strongswan that I followed blindly but without success. I couldn't connect to the VPN from my home. When I visited friends and family over Christmas, I could suddenly connect to the VPN. My router is the FritzBox 7560, the network the VPN was running on was using the FritzBox 7490. I'm sure the 7490 was still on the factory settings when it comes to port settings. I really don't know much about networking, but it's an itch that I can't help but scratch. My layman's logic tells me that my Linux configuration is correct because the changing variable here is the router and the ISP. Therefore, I have checked if port forwarding is set up correctly. Doing research Ports 4500 and 500 are the ports to be transmitted. Somewhere else, I read that an ESP port should also be open, so I did too. Given the output while trying to connect to the VPN, the port numbers appear to be correct. However, before I deal with the VPN itself, I want to make sure that port forwarding works properly first. I opened both ports for TCP and UDP. Here you can see a screenshot. I then tried to scan the router with nmap to see if I can find this port (4500).

sudo nmap -sT
Starting Nmap 7.01 ( ) at 2020-01-04 13:52 CET
Nmap scan report for (
Host is up (0.028s latency).
Not shown: 993 closed ports
53/tcp   open  domain
80/tcp   open  http
139/tcp  open  netbios-ssn
443/tcp  open  https
445/tcp  open  microsoft-ds
5060/tcp open  sip
8181/tcp open  unknown
MAC Address: XX:XX:XX:XX:XX:XX (Unknown)

$sudo nmap -p 4500 

Starting Nmap 7.01 ( ) at 2020-01-04 15:15 CET
Nmap scan report for (
Host is up (0.0021s latency).
4500/tcp closed sae-urn
MAC Address: XX:XX:XX:XX:XX:XX (Unknown)

Nmap done: 1 IP address (1 host up) scanned in 0.57 seconds

I have also followed the steps on this website, starting a netcat (?) Server and using this website.
For example.:

$ nc -vv -l 4500
Listening on ( (family 0, port 4500)

But netcat only listens. The website also shows that the port is filtered.
I also added a service in the fritzbox with said ports and deactivated toredo and netbios-filter without success.

On the router side, it looks like the ports are open. The mac address ports are forwarded to check with the HWaddr of the ifconfig command on my wifi card. I think there is something fundamentally wrong in my understanding of port forwarding. If the ports are forwarded, shouldn't the diagnostic tools at least tell me they are open? If it is not from the outside only at least from the inside? Or is it something to do ip4 and ip6? Long story short. How do I check if my router is forwarding ports correctly?

And me

amazon web services – Port forwarding / mapping on AWS without load balancer – how did I do it?

I have a real puzzle on my hands.

I have a single Amazon EC2 instance, which I installed about 6 months ago. It executes an Apache HTTPD on ports 81 (not secure) and 8000 (secure). He also runs a Tomcat on port 8443. But the outside world sees Tomcat (secure) on 443.

There is no load balancer involved (we have load balanced clusters; I know what it looks like).

The Tomcat and HTTPD servers operate independently of each other.

If I do a netstat on the EC2 instance, it shows that it is listening on 8443, but not on 443. The active connector in the Tomcat server.xml includes a "proxyPort" clause for 443.

If I loop from my desktop to the Tomcat server, on 443, I get something back.
If I loop from the EC2 instance to localhost, on 443, I get nothing; if i do it on 8443, i get a complaint about the fact that the certificate is wrong for "localhost", so it's obviously a connection. So apparently, the mapping between 443 and 8443 is external to the instance.

And as a complete idiot, I left myself no notes on what I did to make this thing work. Can someone tell me what i did and how i did it? Or at least tell me what to look for? I see a security group, but it doesn't say anything about port remapping.

DNS hosting – Port and SSH forwarding in Pi from external addresses

I tried to connect to my Pi (I got it around 2013, so I think it's the very first B model) from outside my home network (I can SSH without problems from the same LAN).

I have configured DDNS using NoIP (so I am on and I believe I have correctly configured port forwarding on my router – that is to say port 22 is sent to the local IP address of my Pi on the LAN, 192.168.x.x

If I try to connect from the outside via, I am told to enter my password pi@myserver.ddns.netpassword: but using the password of my Pi, my router or anything else doesn't work, and in the end I get Permission denied (publickey,password).

Does anyone have experience with this or point me in the direction where I can understand this? I think the problem I have encountered on Google is that there are a lot of more complex issues related to this which seem to be more frequently asked for, so my rather basic problem is not really addressed for all I know.

Note, pinging my server works and doing telnet 22 leads to a connection (as far as I know.)
As you can see, I am relatively inexperienced in networking but I hope to learn, so forgive my lack of technical knowledge.