0
votes
1answer
74 views

Can't establish a reliable VPN tunnel (ShrewSoft client / ZyWALL USG-50 firewall)

I try to setup an IPSec VPN tunnel through my firewall (ZyWall USG-50), but it doesn't work like it should. quick scheme of my installation: ME [A.B.C.D] --- **INTERNET** | ...
0
votes
1answer
46 views

Block Outgoing SMTP Except for Mail Server

Masters, Our ISP ask to solve a problem. They said we send many SPAM from our server. (they only give our router IP address, so we don"t know if we have SMTP flooders from infected cllient, our we ...
-4
votes
1answer
48 views

Single machine server with many operating systems [closed]

Could possibly with single one high end Server with supported Virtualization We can have: - DHCP Server (Virtual Machine 1), - Firewall (Virtual Machine 2), - Squid proxy (Virtual Machine 3) - ...
-1
votes
1answer
53 views

Back-to-back router configuration [closed]

I have inherited a network where there are 2 routers supposedly configured back-to-back. They are both on the same subnet and only one serves DHCP. There is the possibility that they are not ...
1
vote
1answer
73 views

Automatically ask router for port redirection on ubuntu

Is there a way to use uPnp or something to automatically ask a router/firewall to redirect data coming from outside to a machine running ubuntu? Here's the deal, I'm supposed to prepare a certain ...
0
votes
1answer
115 views

Can I use iptables, Shorewall and ipset on the same time?

I'm using iptables for years, because it is a straightforward solution without any magic. But now I'm building a router for myself, I found there are many useful features provided by Shorewall. Is it ...
2
votes
1answer
65 views

Why is a remote IP redirecting to a local server?

I've got a rack full of Linux servers that host OpenVZ containers and for some reason when I attempt to connect to a certain remote IP from inside a few of the OpenVZ containers (using telnet, for ...
0
votes
1answer
44 views

Reachability with OSPF on firewalled network

I'm trying to figure out how OSPF establishes routes when used on a network with firewalls. Say I have four routers (A, B, C, and D) and two firewalls (F1 and F2), arranged like so: (LocalA) A - F1 ...
0
votes
1answer
136 views

ADSL Router - Access External IP internally

I have a problem when I'm doing an access using my DNS hosted at another server, which performs a redirect to my internal network. example: User attempting access to internal DNS: intranet.site.com: ...
-1
votes
0answers
155 views

Need iptables commands to permit all WAN originating traffic to enter the LAN side of a router [closed]

I have three routers. Router0's WAN interface connects to the ISP, and the WAN interface of Router1 and Router2 connect to Router0's LAN interfaces (i.e. hard wired). So this is what it looks like, ...
0
votes
1answer
65 views

Export iptables logs to network storage in a limited storage dd-wrt router

Because some routers have very limited storage space; security logs are disabled in the micro version of dd-wrt. Is it possible to export the (iptables) logs to an external storage?
1
vote
1answer
87 views

Suggestions for consolidation of old Linksys routers

I have a very simple small business network that I set up about 10 years ago using a pair of Linksys routers. Over the past couple of years, the routers have become increasingly unstable as the ...
-2
votes
1answer
82 views

How do I find out the internal ip address of a router in front of a firewall

We have a network with a firewall and outside of the firewall the router to connect to the isp. How do I find out what the internal ip is of that router. I do know the external ip, our fixed ip, but I ...
0
votes
1answer
52 views

Multiple webservers behind firewall done correctly?

Basiclly I have a firewall and behind it i have a webserver which is a webportal for clients, a second webserver that hosts their webpages and a DNS server I want to route the traffic through that ...
0
votes
1answer
194 views

Can't connect to my own machine through public IP

I couldn't figure out why I can't make a connection through my public IP. When using a local IP it works. I have the proper firewall port exceptions, and my router NAT has the configurations for port ...
0
votes
1answer
32 views

Unified Threat Management

This might be a simple question: On what layers of the OSI model does Unified Threat Management work? And what devices do you recommend for using this? Thanks, Dempsey
3
votes
1answer
103 views

Traffic backlogged after (D)DoS attack? [closed]

About 25 hours ago, I got an e-mail from UptimeRobot (uptimerobot.com) telling me that me websites had gone down. I raced over to my server room, where my TP-Link router was completely unresponsive ...
0
votes
1answer
175 views

SSH to Mac OS X 10.7

I am trying to SSH from my work computer (Ubuntu) to my home computer (OSX 10.7) that is behind a Belkin router and have so far been entirely unsuccessful. Here are the steps I have taken so far ...
2
votes
1answer
257 views

Configuring ufw or iptables to allow only outbound traffic to the Internet from an internal IPv6 network

How do I configure ufw or iptables to allow only outbound traffic from an IPv6 network to the Internet? I have an office network with a traditional NAT setup for IPv4. I would like to add a PC ...
1
vote
1answer
55 views

Apache local domain hosting through exposed server

Maybe I'm not frasing my question properly, but I have a single IP address and multiple servers behind that IPs router. Is there any way for me to redirect requests from the server getting the HTTP ...
0
votes
1answer
87 views

NAT/PAT port and address selection

I am currently having some issues with TCP port reused too often (under 2 minutes) for a source NAT and I was wandering what is the algorithm used to select the IP and port for a SNAT. Here is some ...
0
votes
1answer
49 views

IP Tables though Simple Router Machine

I have being setting myself up a router, for mainly for dns+dhcp functionality (mess about with alot of virtual machines). I have two interfaces eth0 and eth1. Eth0 can be see as the WAN with eth1 for ...
0
votes
1answer
89 views

Mara systems border firewall with pfSense

I just bought a used Mara systems Border firewall with pfSense installed on it. I want to reset it or reinstall pfSense because I cant reach the WebGUI or anything. Does anyone know how to go about ...
0
votes
1answer
57 views

Exposing Specific endpoints on a port - Vigor 2820n

I have a vigor 2820n router I want to allow an external (public) service to call into a specific endpoint that calls an HTTP server, e.g. http://my.public.ip:8989/open_to_the_world. So far so good ...
1
vote
1answer
116 views

Cisco wrv210 static IP behind comcast router too slow

So I subscribed to a Comcast business account (cable internet provider) and put a Cisco WRV210 in front of the Comcast modem. They gave me 1 static IP address which i'm planning to use to access my ...
0
votes
2answers
177 views

Do I need to enable firewall before Natting? [closed]

I want to make my local server visible over the internet. I've learnt that I'll be able to achieve this through NAT. I'm using a D-Link router, DIR-600. In the application rules it asks me for ...
0
votes
2answers
270 views

Convert Cisco Router config to Cisco ASA config

I'm trying to migrate a large and complex ip extended access list from a Cisco 3725 router to a Cisco ASA5325-X firewall and I don't want to rewrite it so that it will work on the ASA. My question is ...
0
votes
2answers
265 views

What other protocols must not be fire-walled for FTP to work? [closed]

My Netgear router randomly reset itself the other day loosing all of my config settings: DSL details, Firewall rules, the lot! So I set about restoring all of the details manually, but when it came ...
-2
votes
1answer
563 views

Possible form for a ddos attack? [duplicate]

I have kinda asked this before. I've set up a server that serves my website, dns and some gameservers. However, when I check my routers firewall log, I get alot of incoming UDP packets blocked on the ...
1
vote
1answer
1k views

Router: WRT54GL vs. Raspberry Pi [closed]

For routing and firewalling between 4 L2 networks, I currently use a WRT54GL (without using the WIFI). There are 4 networks routed which come in by VLAN from a managed switch, so a only a single ...
0
votes
1answer
496 views

Outside to port 80 doesn't work with IPTables with Squid

IPTables rules : # RESET iptables -F iptables -t nat -F iptables -t mangle -F iptables -X # Pas de filtrage sur l'interface lo iptables -A INPUT -i lo -j ACCEPT # Debut des reles de firewall ...
2
votes
1answer
499 views

Check what the average packet size is in a network (what firewall/router should I get)

Is there any way to do this? We are looking into buying a Fortigate 100D but are unsure if it will hold up to our requirements. http://www.fortinet.com/products/fortigate/100D.html While the ...
-2
votes
1answer
201 views

How does a proxy server forward reply to the client?

A proxy maintains anonymity, i.e. the server replies to the proxy thinking that it is the client. now after receiving the reply fro the server, how does the proxy server forward the reply to the ...
0
votes
1answer
181 views

Spoofing Packets?

I host a GameServer and some stupid guy just keeps attacking my Application server with random queries. I have found a solution to block it but he uses different kinds of queries so I have to block ...
3
votes
5answers
894 views

Are there any security benefits to having a dedicated firewall?

Are there any security benefits to having a dedicated firewall rather than having a firewall established on a router? Thanks.
4
votes
5answers
776 views

Host DHCP services on server or firewall/router?

I've been debating with myself about the best place for hosting a LAN's DHCP services. I have the option of either on a sonicwall firewall or a Windows 2008 server. The two things I was looking for ...
0
votes
1answer
413 views

Setting up Ubuntu Router

I have a fairly standard network set up with a Cisco router with a bunch of public IP addresses connected to a TMG Server Firewall (For the sake of anonymity lets say the public IP of the TMG server ...
1
vote
1answer
6k views

FortiGate 60C and Port Forwarding

Without going into too much detail, I'm in over my head due to recent staffing changes and a lot of extra responsibilities falling into my lap that are outside my current area of expertise. So any ...
2
votes
2answers
1k views

IP Address Conflict with Router/Firewall

I've been having IP issues with my local box for a couple months now. Usually when it starts acting up I don't have the patience to look into it, so I just drop onto DHCP, but this morning I've ...
-1
votes
1answer
197 views

Run web server behind router which I can't change anything in [closed]

I'm currently at a schools network and can't change anything in the routers configuration but I still want to be able to run a web server. I've scanned the router for some open ports and only found ...
2
votes
1answer
898 views

Juniper SRX210, How can i enable the port 554, 9001 for 192.168.1.151 local IP?

I have been strugling to solve this but still i can not fix it. I have 192.168.1.151 PC and it has 554 and 9001 TCP/UDP open. But i need to publicly access that. In my juniper srx210 i have this ...
1
vote
2answers
1k views

Smoothwall Express interface issues

I have a SmoothWall Express box that is currently configured with a Green and Purple interface. Both interfaces are in the same /24 subnet (which seems odd to me). The green interface (address of ...
0
votes
1answer
264 views

Router: Firewall web filtering blocks more than intended sites

I use our router's firewall to block certain cites by a "keyword." For this I put the site's name, such as Facebook, so the for the keyword field, I will put facebook, and it blocks facebook ...
2
votes
1answer
138 views

Using a dynamic dns securely

I'm bit of a newcomer when it comes to networking, firewalls and port forwarding - please bear with me: I've just setup a dynamic DNS that points to my external IP and are handled through my Cisco ...
2
votes
1answer
143 views

Mysterious Raw Ethernet II Packets on Network Captures

I'm having a terrible time diagnosing why these bizarre Raw Ethernet II packets are on the LAN side of my firewall. The destination MAC address seems to increment where the source MAC address seems ...
2
votes
3answers
256 views

Multiple IP addresses vs. Reverse Proxy / Apache Rewriting

We're a small business and trying to decide on the best architecture for our internal boxes. We have some dev, production and staging environments. All of them are publicly accessible (but of course ...
1
vote
1answer
223 views

Replacement for Sonicwall TZ series firewall [closed]

I am looking for a relatively cheaper alternative to the Sonicwall TZ series firewall/wireless router device. The main features I am looking for are: 1. Wireless router capability on a separate ...
0
votes
0answers
817 views

Juniper ssg 5 web UI not working

I am facing issue with my Juniper SSG 5. I tried to configure & enable web filtering in my office following various ways to do it on the web. Even with various permutations it is still not ...
1
vote
2answers
230 views

Simple Port Forwarding

I have searched and searched and tried several different things and have not been able to fina solution. Here's my situation: node1 has 2 interfaces: eth0 (Public IP: 56.X.X.X), and eth1 (Private ...
2
votes
1answer
271 views

Rackspace Firewall/Gateway Setup

I have rackspace account and wish to have this sort of setup: Firewall/Gateway eth0 - Public IP (56.X.X.X) eth1 - Private IP (10.X.X.X) Ubuntu 10.10. Accepts connections from the internet and ...