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Questions tagged [forwarding]

Redirect a port to another one, used to access a computer from behind a firewall.

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13 views

openvpn (webmin) internal routing dont forwarding (wrong gateway?)

I'm using openvpn (with webmin and ubuntu 18.10) and the traffic is not forwarding between subnets =[ Openvpn is generating a route table with a wrong (i think) "gateway" I need 2 (or more) subnets ...
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21 views

Making iptables port forwarding access from LAN

I have rule in my config like below: $IPT -t nat -N FOO $IPT -t nat -A FOO -i eth0 -p tcp --dport 444 -d public_eth0_address -m conntrack --ctstate NEW,ESTABLISHED,RELATED -j DNAT --to-destination ...
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36 views

Forwarding packets across network to OpenVPN server clients

I've been unable to resolve this myself and really need some help as my networking knowledge isn't the strongest. Setup: Flowchart of network I want to be able to connect to the 10.8.0.2 client that ...
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38 views

GCE DNS forwarding

I'm trying to setup local DNS forwarder for the VPC network to use LDAP controller which is running DNS server. I have few GCP projects which should be able to communicate over already built VPN ...
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1answer
38 views

Redirecting HTTPS

We built a site for a client to advertise a new block of apartments they had built. The apartments have now all been sold so we have been asked to forward the domain to another domain until there is ...
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1answer
19 views

linux route nic2 connections to nic1

I have in linux envrioment: 1) firewall (192.168.1.1) 2) server1 (192.168.1.2) 3) server2 ubuntu (NIC1 - 192.168.1.3 - NIC2 - 192.168.2.1 - can customize) 4) device1 - 192.168....
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1answer
66 views

Odd Behavior of DNS forwarding with SRV record resolution

I'm running into a weird problem while setting up a new SAMBA AD DC on my network. I've got the DC itself up and running and checked on the server that I am able to resolve the DNS name of the server, ...
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1answer
46 views

Traffic does not get routed through vpn

Having set up a tinc VPN node properly (the vpn Connection works): I have set the following options net.ipv4.ip_forward = 1 iptables -t nat -A POSTROUTING -o ens2 -j MASQUERADE If I then set the ...
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27 views

Forwading trafic from dns0 to eth0

So i have a problem for forwading trafic from dns0 interface to eth0 interface. dns0 is the iodine interface. Ip is 10.0.0.1 eth0 is the web interface. Ip is 192.168.1.250 (and router .254) there is ...
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0answers
61 views

Setup DNS Forward Server to forward only specific domains

I want to setup DNS Forwarding Server to forward DNS resolution requests for only specific zones. I am using the following config. acl "trusted" { localhost; 10.x.x.x/24; }; options ...
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1answer
84 views

Forwarding traffic between two interface

I have a Linux box with two interfaces: ~#ip -4 addr show scope global 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 inet 192.168.45.101/24 brd ...
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1answer
32 views

Port forwad public ip port to internal server on different interface

Hello I am trying to port forward a public ip:port I have on a wan interface to a server on my lan my server has two interfaces ens19 [WAN] ens18 [LAN] I then have another server connected on the ...
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1answer
138 views

Forwarded connection refused by server: Administratively prohibited. Using both @IP and PermitOpen

[This Machine is 192.168.80.125] Normal SSH Rules to allow all basic access: AllowUsers user1 PubkeyAuthentication yes PasswordAuthentication no AllowTcpForwarding ...
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1answer
35 views

How to route or use iptables to forward one server port to client on different subnet

The setup (all is linux): client IP address: 192.168.2.15 (interface eth1) box IP address: 192.168.2.2 (interface eth1) box IP address: 192.168.101.11 (interface eth0) server IP address: 192.168.101....
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1answer
63 views

linux port forwarding between two nics [closed]

I have a vicidial server running on suse. I have installed two nic cards. One nic connects to my local network and the other connects to the firewall. The config is as below: Nic 1 : 192.168.2.21 (...
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0answers
16 views

Forwarding traffic - passive behavior

I spent some time trying to figuring this out. I found my core solution, but iam not satisfied, or more likely i dont fully understand the result, which buggs me. My setting: I have wall plug(port) ...
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0answers
42 views

Bridge is loosing packets

I have a Router running OpenWRT 15.04. The Router has a dedicated Wifi Radio, which is internally connected to eth5. I am running 2 Wifi Networks on that Dedicated radio, one is running on vlan 3. So ...
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301 views

Port forwarding through VPS with OpenVPN to Client

In an attempt to allocate a public IP to a server inside my network i have the following scenario: VPS running Centos 7 and OpenVPN server with public IP 162.208.11.152 on interface venet0:0 Local ...
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1answer
33 views

Subdomain forwarding to internal server

Hello this is my scenario: DMZ has two servers the www hosted at internal IP 10.10.1.5 and mail hosted at 10.10.1.10. I would like to be able to be forwarder to the proper server when from Internet I ...
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1answer
616 views

plink.exe remote port forwarding to local machine for dynamic port forwarding

I have been trying since 2 days to do the following: I have a windows machine, let's call it A, and a Linux machine called B. There is a firewall between A and B. I want to connect remotely from the ...
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1answer
400 views

setting reply-to in sendmail.mc

I'm using sendmail to send Mails from PHP and also forward some mails addressed to the server to a list of external mail-providers. The forwarding is done via an entry in /etc/mail/virtusertable: ...
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1answer
255 views

multi-hop routing without NAT

i recently started to play a little bit with iptables and routing and came across the following problem: i have four servers A,B,C,D with ip_forwarding enabled and my goal is simply to route icmp ...
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0answers
22 views

Block forwarding from external to internal network with iptables

If there is a server S which is connected to two networks External and Internal. Host Ai from Int network can connect to host Be in Ext network through S that has SNAT for this scenario. But one day, ...
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0answers
31 views

Why is my domain's email forwarding working really strangely?

This is a maddening problem that makes absolutely no sense to me, so I'm going to see if I can spell it out step by step and at least figure out WHERE the problem is. I have a PHP form that sends an ...
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1answer
34 views

Setting up DNS mask with forwarding through SSL

My setup is as follows: User goes to subdomain.mainsite.org.uk.example The site I want to be visible is www.site2.example, however they still have to see subdomain.mainsite.org.uk.example in the URL ...
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201 views

Enabling NAT on RHEL 7 Openstack vm with iptables

I have the following two network ips: eth0 - 40.0.0.8 (External facing) eth1 - 50.0.0.5 (Internal network) connected to a management node that is to provide internet access to the rest of the nodes ...
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1answer
40 views

ssh forwarding to master/slave nodes

With putty and pageant, I want to login to a master node and from that, I want to ssh to an agent. The forwarding is enabled in the putty options. I can ssh to the master without password prompt. ...
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1answer
186 views

Does a DNS server intercept and respond to DNS requests even if it is not the intended DNS server of the requesting machine?

"A" wants to resolve google.com using DNS Server 1 or 2 (as set in IPv4 settings on the NIC). But DNS Server 3 is between "A" and either DNS Server. Will server 3 attempt to respond to the DNS query? ...
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2answers
143 views

DNS requests on an airgapped network

I work with an isolated/airgapped global network with several redundant domain controllers which also act as DNS servers. My question is, I hope, pretty simple, but I seem to be having a hard time ...
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1answer
37 views

Bind9 forward with forwarders for missign A records

I have a local DNS server running Debian and BIND 9.10.3 Currently it is configured with two forwarders 8.8.8.8 and 8.8.4.4 in named.conf.options I have created a "dk" zone zone "dk" { type ...
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1answer
333 views

Access web server on VPN client through VPN server public IP

I am trying to access a web server running on a PC, that is behind a firewall not managed by me, using a VPN connection (openvpn). Basically, I want to use the public ip of my VPN server for accessing ...
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2answers
937 views

IPTABLES allow forward only from specific outside MAC to specific inside IP?

It is possible to create iptables rule, that allows access from outside net (behind wan eth0) from specific MAC address, to only specific IP address behind the inside adapter (safe lan eth1) ? Model: ...
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1answer
784 views

Configure squid to forward requests to another proxy

I'd like to setup squid on Ubuntu as a forward proxy. The application I'm using only allows requests via unauthenticated proxies, not proxies that require username/password. It's for this reason I'd ...
3
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1answer
2k views

host port forward with qemu through libvirt in user-mode networking

I'm having trouble editing my libvirt's host-xml to make qemu forward TCP connections to the guest. This questions linked to a blog post which recommended adding -redir to the Qemu command line. But ...
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1answer
136 views

Cannot connect to SSH remotely

I am using Ubuntu 16.04 LTS on both my client and server computer. The server is running the OpenSSH-server software and I have no problem connecting to it locally. I cannot, however, connect to it ...
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2answers
59 views

how to make a host in the Lan to forward traffic between other hosts in the same LAN in Linux

I am setting a test topology as the following: Switch1-----Switch2-----Switch3 | | | H1 H2 H3 I want the traffic going from H1 to H3 to go visit H2 before ...
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1answer
92 views

Forwarding an ip address to a server in another region on aws

I have been using a server in N. Virginia for a while with an elastic ip. Several applications that I wrote are connecting to that Ip for a database. Now I need to move the server to Europe for some ...
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1answer
30 views

Does it make trouble to reject mails in the smtp dialog when users use forwarding?

I have a spam filter, which rejects some mails based on header fields during SMTP dialog with header_checks in postfix. Is it a problem, when a user sets a forward from another server to an address ...
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1answer
312 views

Forwarding X11 between Windows > Linux Server1 > Linux server2

I got this problem... My machine is a Windows(S1), who needs to connect to a Linux Server(S2) [used like a jumpbox], to connect with Linux Server(S3), which is the target machine. I got Putty and ...
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1answer
371 views

SSH ForwardAgent is receiving “Connection closed by remote host”

I'm trying to connect to a remote server using SSH ForwardAgent but I'm facing all the time the same issue : ssh_exchange_identification: Connection closed by remote host I've setup my ~/.ssh/config ...
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1answer
37 views

How to setup 2 machines as 2 subnets with “router” between them?

I've been trying to solve the following task for almost a week now, but unfortunately I don't think I have proper skills to solve it the best way. I need to setup a following network: 192.168.2.1 &...
2
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1answer
38 views

Broker Direct Connection

Is it possible to use a server with a static IP address to broker a direct connection between 2 clients which are each behind NAT's? I've used autossh and port forwarding to set up a connection ...
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1answer
157 views

Forwarding port 5000 traffic from one interface to another one

I'm trying to give public access from outside my network to a specific device (10.1.1.12) inside my network, using port 5000. I have a PC acting as a firewall between my gateway and the devices ...
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1answer
23 views

port forwarding and NAT

I've 2 locations, no. 1 in GBR and no. 2 in NO. I need to connect to a service in SE, from location no. 1, through location no. 2 to a service provider which only allow traffic from no. 2. Right ...
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2answers
345 views

Forwarding Domain but not Subdomain [closed]

I want to forward the main domain example.com to the (WIX webspace) domain guenterpolt.wixsite.com/example but not the subdomain moodle.example.com which should stay on my server. I cannot use DNS ...
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1answer
79 views

Linux IP-tables Forwarding loose Source IP on access.log [closed]

Team, We have configured IP tables with forwarding request coming on eth1(public IP x.x.x.x) interface to other server. We are able to forward all requests but problem is loosing origin public IP(...
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1answer
568 views

XenServer 7 - Pass all public traffic to firewall solution

I have a server running with XenServer 7 installed. Currently the XenServer only has a single VM (FW01) which is my Firewall solution and router, what i would like to do is connect the XenServer to ...
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4answers
3k views

Linux iptables rejected - How do I enable it back?

so I'm having a client in my network connected to the router through my computer with arpspoof. When I know want to stop the packet forwarding I execute: iptables -A FORWARD -j REJECT that is ...
2
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1answer
155 views

Arista switch - Forward multicast traffic from vlan to vlan on different switch ports with different subsets

I have an Arista DCS-7150S-24-R I got a cross connect from provider X into port #1 (port marked as vlan 100) I got a linux host connected to to the switch at port #2 (port marked as vlan 200) Ports ...
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1answer
264 views

Forward traffic from one process only

I want to inspect and modify the http requests from one process sent to another. For that I have a proxy running on localhost port 8080/tcp. The process owner is root, and the application it sends to ...