0
votes
0answers
57 views

Multiple routes and gateways with NAT

My setup is a VM host with two network interfaces where I want to use one as private/internal and the other one as public (which will get a public address on the host), where all the NAT magic to the ...
0
votes
0answers
159 views

Martian packet errors with physical adapter's IP address on GRE tunnel

I'm very new to the networking world (most of my time is spent as a developer), so I could very well be missing something simple. TL;DR version: I get 'martian packet' errors on response traffic when ...
1
vote
1answer
88 views

Forwarding ports from server with 2 internet connections

I have 3 interfaces on my main server, first is used for the local network, second and third are internet connections (each has its own ip routing table): eth0 192.168.0.1 eth1 9.9.9.9 eth2 7.7.7.7 ...
3
votes
1answer
281 views

NAT box load-balancing with iptables and 4 DHCP uplinks

I am trying to configure a router which provides Internet to a couple hundred users. This router has 4 basic cable uplinks at its disposition, which all use DHCP and have a capacity of around 10/1 ...
2
votes
1answer
700 views

iptables asynchronous NAT. packets drop after prerouting table

I have a Centos server acting as a NAT in my network. This server has one external (later ext1) interface and three internal (later int1, int2 and int3). Egress traffic comes from users via int1 and ...
3
votes
3answers
2k views

Advanced routing problem

I have 2 internet links using 2 ADSL routers and I need to give access to the Internet for the 192.168.0.0/24 network. I have to route outgoing traffic based on port number, protocol, … using ...
1
vote
1answer
290 views

iproute and nat across devices

I've got the following configuration: vlan123@eth0 - range 1.2.3.0/24, with 1.2.3.4 assigned to it br2000 - range 10.2.3.0/24 In the ip route I see: 10.2.3.0/24 dev br2000 proto kernel scope link ...