Networking :: Port Forwarding - Router - Ssh Requests Time Out - Tomato Firmware

May 18, 2010

I've managed to confirm that I can reach my home network via ssh from a remote location through my SMC Barricade when it is directly connected to the desktop machine but when the second router is put back into the chain ssh requests time out. The second router is a Linksys WRT 54GL running the Tomato firmware. The chain looks like this: ISP's router (bridged) --> Barricade -->WRT54GL-->desktop

The Barricade has port 22 forwarded to the Linksys' WAN address and it in turn forwards to the desktop address. It appears that it is a setting on the Linksys firmware that is preventing the remote connection. I've looked through the various settings many times but cannot see anything that would cause the problem.

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Ubuntu Networking :: Set Up Router With Tomato Firmware To Save The Bandwidth Usage Information?

Mar 20, 2010

I'm trying to set up my router, with tomato firmware, to save the bandwidth usage information. One of the 'save history' choices is "CIFS" ... I'm lost as to how to create this save area..anyone able to give me a link to a 'how to' ...or if you've done it, perhaps a step by step?

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Networking :: Port Forwarding - Trendnet TEW-652BRP To DD-WRT Firmware Update

Feb 26, 2011

I have a Trendnet TEW652BRP wireless router, HW/ V2.1R, FW/ V2.00b34. I have read that these routers had a problem, with the stock firmware, where port forwarding was concerned. And indeed, I do have some problems with it. Ie; canyouseeme.org can't see me when I open ports, and I am not on a proxy server. I have tried this with the appropriate exception rules (in/out) in ufw, and on the router settings with UPnP enabled and disabled. In the latter case, I also tried router firewall rules, port forwarding and access rules. Still could not see me (timed out in all cases).

Now, this being an area I have little experience with, I am not sure if this version of firmware was supposed to have fixed the PF problems. To the questions...

1. Has anyone here who had an analogous experience found a solution, with the stock firmware?

2. I have read about the DD-WRT option to flash the router firmware (which says fixes the issue), but I am wary. I believe this is a Linux based replacement firmware, which is not a bad thing in my book, but does anyone have any recommendations or heads up on issues with it, from experience, apart from what is commented in the documentation at [URL]

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General :: Tomato/DD-WRT Router To Act As Switch And Only NAT Some Port

Sep 17, 2010

I have a device that must use a real IP address. Currently, my ISP uses DHCP and I can have up to 4 real IP address assigned. However, the cable modem only have 1 ethernet port and it's connected to my router (running Tomato, but can run DD-wrt or other Openwrt if required). Question stems from how I can connect the additional device, requiring a real IP? would be to get a switch and connect to the CM, Router, and Device. But alas, I want to avoid this route, since:

my wiring cabinet in my home is drawing lots of power and heat already Device will be unprotected by any firewall unable to monitor the traffic to/from device.Besides, what would be the FUN in that? what I want to do is to configure the router, so that one of the switchport is removed from the normal br0 bridge. Instead, I want to make it behave like a switch on the WAN port. What's the best way of doing this? Should I create another bridge on the WAN & the device port? Can a single port belongs to two bridges? or would I need to create a subinterface first? Would I need a DHCP-relay? Am I expecting too much from my poor cheapie router?

+------+
| CM |
+--++--+
||
+----WAN---------------+

[code]....

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Networking :: Port Forwarding In Router For Wol?

Mar 4, 2009

I have the wake on lan option enabled on my debian computer. If i wake it by sending:

-mac adres
-internal ip in my home network
-subnetmask
-port 7

It all works fine, but when i try to do it from outside my network and change the ip address to the router adress it wont go on. I have also opened the port 7 in my router.

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Ubuntu Networking :: Router Port Forwarding For Ssh

Aug 22, 2010

I have logged into my router and set up port-forwarding on port 22. I can log into the machine fine from a machine on the local network using the machines internal IP but when I try to log on from a remote machine using my router's external IP or my DyDNS host-name I get a message saying "connection refused" or "connection timed out." I have configured port-forwarding on the router and the firewall rules says that port 22 is open but when I nmap my routers external ip it says that only port 23 and 80 are open. I am very new to linux and networking.

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Ubuntu Networking :: SSH Server And Router Port Forwarding

Aug 29, 2010

I'm trying to get my SSH server I set up on my home box working from behind a router. A 2wire 2700HG-B gateway, in fact. Now, I know my server is working fine, because I can get into it via loopback, anywhere inside the LAN from another machine, OR if I go into the router's config and enable DMZ for the machine. However, I don't like having DMZ on all the time because of the kludge-ness of it, and the security issue of the complete absence of a hardware firewall.If I try to port forward and access it from outside the LAN using the external IP (or my DynDNS, because it's dynamic), it just times out. I have a nonstandard port (45) for the listen port of the server, to keep away hack attempts if I were using the standard 22. I used this to see if the port was open, and it said it was. But, I tried the trick of telnetting the IP with that port, and it also timed out, instead of printing stuff about OpenSSH.

Attached is a screenie of my router's firewall page, so you all can look at it and see if I'm an idiot and doing it wrong. You might notice uTorrent there, it's because this machine is a dual-boot with 7, and the router doesn't differentiate the OS's. Also the SSH @ 46 port is for the Windows side, with freeSSHd. I changed the port on that one so the client I have can distinguish them, so it can run a reachability test.

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Ubuntu Networking :: Router : No Connection After Modifying Port Forwarding Settings

Sep 2, 2010

what I have: Belkin G Wireless Router Model F5D7234-4. To attempt to get Subsonic working, I changed the port forwarding settings (Belkin calls it Virtual Servers) to forward port 4040 to my desktop computer. I then saved changes, and my wireless disconnected. I waited about 3 minutes, and nothing was happening, so I restarted my router. This left me in the position that I am in now. Even when the router and modem are fully booted, the router does not broadcast my SSID. In addition, a wired connection will not connect to the network through the router. This leaves me completely unable to use wireless, and unable to change any settings in the router.

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Networking :: Shorewall: Port Forwarding Port Is Closed Even After Forwarding?

Dec 12, 2009

I have just set up shorewall on my router running Arch Linux. The external network is on eth0 and the internal network on eth1.I have set it up for masquerading and that works fine and I can open ports to the firewall. But I'm having trouble with port forwarding to my internal machines.The problem I have is that when port 22350 is forwarded to 192.168.1.3 on my local network, checking the port with nmap from a remote computer gives me:

Code:
PORT STATE SERVICE
22350/tcp closed unknown

[code]....

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Ubuntu Networking :: Using Tomato Router As Wireless Bridge

Feb 5, 2010

Using Ubuntu Server 9.10 x64 and a tomato router to act as a wireless bridge to connect to another router. The reason I ask is because I do have the router set on WDS mode on the tomato firmware. I think I have it configured to the best of my ability, but when the interface is up, the signal doesn't get pushed out (no received packets) and it gives something at the bottom of an ifconfig eth0 "Interrupt:28".

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OpenSUSE Network :: Router With 2 DSL Connections Not Port Forwarding?

Apr 26, 2010

I'm running suse 11.1 which is configured as a router. Configured are two DSL connections with static IP's and one LAN connection (3 NIC's all together).

Problem: suse firewall will only port forward connections from one of the DSL connections and not the other.

Because I'm running two DSL connections is there something special I have to turn on/enable on the firewall?

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General :: X11 - Unable To Add Any Port Forwarding Rules To Router

Feb 22, 2011

Say I have Computer A behind a router with NAT. I'm unable to add any port forwarding rules to that router. Then I have Computer B with a public IP address that I want to forward X windows from. This computer is headless, but does have a video card so X windows can be used. Here are some of the things I'd perform to setup my scenario.

1. Computer B, I'd run xhost + public_ip of NAT router.
2. Make sure that computer B's sshd service has X11 forwarding enabled.
3. SSH from Computer A to Computer B with the X windows forward option.
4. Once in Computer B, set the DISPLAY env variable to the public_ip of NAT router.
5. On Computer B run xclock.

At this point I'd expect to see an instance of xclock originating from Computer B onto my desktop. However this obviously won't work. The problem is that when the request is made to Computer B to forward the instance of xclock to Computer A the forwarded instance of xclock will get stuck at the NAT router. Without a port forwarding rule the NAT router will not know which internal IP to route the instance of xclock.

Here's my question. Is there any way for Computer A to initiate a connection to Computer B and then forward the instance of xclock? That way if it uses that same connection the NAT router will know which internal IP to route it to because it would be an active connection in the router's routing table. Or is there an alternative? Of course I can vnc into another computer outside the NAT network and then forward an X window to it just fine. But in the spirit of expanding my knowledge on X windows I'd like to see what is possible.

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Server :: Connecting CCTV DVR To Router With Port Forwarding?

Jul 30, 2011

1. Need to connect 2 CCTV DVRs and view from remote. 2. Can get a static IP address. But I dont know if this is a secure way since any once can view if the know the ip address. 3. Question is : is it possible to connect the DVR( s) to a linux server which will get user name and password before letting us view the DVR. Currently there is one set as follows: 1. From location X a device is connected to location Y using leased line and static IP (12 kms distance). In location Y a router is placed and port forwarding is configured. From Location Z using internet and remote desktop concept the device at location X is viewed and data captured. Is it possible to use a similar concept but with some sort of security authentication procedure in place.

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Networking :: Which Current Model ADSL Modem Router For DD-WRT - OpenWRT Or Tomato?

Mar 25, 2010

What are the pros and cons of various current model ADSL modem routers for use with DD-WRT, OpenWRT or Tomato? There are, of course, hardware compatibility lists (HCLs) for each of these (DD-WRT, OpenWRT and Tomato) but many of the models are no longer available and there are so many that researching them all would be onerous. Many pages on the Internet recommend the WRTG54L and that would be great but it is no longer an option except second user which is increasingly difficult. What are the pros and cons of the various chipsets: ADM5120, AR7, IXP4xx and BCM63xx?

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Ubuntu Networking :: Error - Remote Port Forwarding Failed For Listen Port 5500

Aug 7, 2010

When I use the following command:

ssh user@ssh_server -L 5500:localhost:5500 -p 22

everything works fine. I can log in, and local port forwarding is done. Otherwise when I use the command:

ssh user@ssh_server -R 5500:localhost:5500 -p 22

I get an error "remote port forwarding failed for listen port 5500". However when I try remote port forwarding in WinXP by use of putty there is no problem...

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Ubuntu Networking :: Port Forwarding Through A Specific Port?

Jul 14, 2011

I want to set my ip as static and port forward it through a specific port can anyone help me with this im using ubuntu 10 with 64 bit OS

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Networking :: Iptables - Port Forwarding To Blocked Port?

Mar 25, 2010

I have a mail server on which I would like to block port 25 on my eth0 for everyone except our external spam filter. the problem is that I want our users to be able to connect via port 10025 which is forwarded to port 25, which then is blocked...

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Networking :: Setup Port Forwarding Of Port 1000 To Ip 192.168.1.200?

Oct 24, 2010

I had to add them to my firewall script when I installed openvpn on my dd-wrt router:

iptables -I FORWARD -i br0 -o tun0 -j ACCEPT
iptables -I FORWARD -i tun0 -o br0 -j ACCEPT
iptables -I INPUT -i tun0 -j REJECT
iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE

what should I add/change to set up port forwarding of port 1000 to ip 192.168.1.200. also how to get the answer sent by 192.168.1.200 follow the same route used by the data received through port forwarding.

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Ubuntu Security :: Router - Port Forwarding And Network Security

Nov 11, 2010

As it stands I have a small home network operating behind my modem/router. Some of the ports on this are forwarded to my PS3 for gaming but I was looking at forward some for my file server.

At the moment I've forwarded port xxx22 to port 22 on my server for SSH for instance. ANd similarly 21 for FTP (although it doesnt seem to want to connect for any more than a few seconds using that). What I was thinking of doing was placing a small website for a handful of ppl to use on the server too and port forward again - xxx80 to 80. It works just fine but I'm a little concerned on the security front.

As I've moved the port to something different from the outside world I'm presuming I will have already cut the potential for malicious folks to wander in but is there anything else I should be doing? At the moment there's no firewall operating on the server, usually as its hidden behind the modem/router. But if I open this thign up more permanently what should I be doing? I've read a few articles on it but I'm always left with the overwhelming thought of "Thats if theres no firewall in my router" as they just seem to do the same.

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Ubuntu Networking :: Get Wireless Router To Forward Ftp Requests To Computer?

May 18, 2010

I'm trying to make my wireless router always give me the same ip address every boot (192.168.1.100). I do not have a static ip address from my isp.

Everything I've tried from online help has made my internet break and I'm not even sure what exactly I should be searching for on google.

Ultimately, I'm trying to get my wireless router to forward ftp requests to my computer which shares the network with an xp machine. I think this is the way to go about it.

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Ubuntu Networking :: How To Ssh 9.10 Without Port Forwarding?

Nov 21, 2010

I have a ubuntu 9.10 on my desktop in my office and I have another ubuntu on my home desktop. Both machines are behind a router. I guess many people have already asked the same question: how to remote control the office desktop from my home desktop?Many posts discussed about solving this by setting up ssh and port forwarding. But my situation is that I cannot control the router in my office so I cannot set up any port forwarding for my office desktop. So I guess my question becomes how to remote control my office desktop without setting up any port forwarding on the office router.

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Ubuntu Networking :: SSH - VNC - No-IP And Port Forwarding

Mar 26, 2011

I currently use a commercial VPN when working overseas for secure internet access.

I now also need to VNC to a home ubuntu desktop (which runs software 24/7 that I need to periodically check).

When overseas, I use a Ubuntu laptop and an Android tablet.

For the VNC I intend to use an SSH tunnel. So my question is: should I ALSO set up openVPN on the home computer (so I can stop paying for a commercial provider which routes all my traffic twice across the Atlantic...) or is it easier/better to use the SSH tunnel for the secure webbrowsing too? Something like a SOCKS proxy?

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Networking :: IP Tables Port Forwarding?

Jan 8, 2010

We have one linux machine in the office which happens to be an important firewall. I just know the basics and need to make one changeEssentially it is forward mysql traffic to another internal machine.This is the original rule (forward to 192.20.0.17) which is working

Code:
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 3306 -j allowed
$IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $STATIC_IP --dport 3306 -j DNAT -

[code]....

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Networking :: How To Configure Port Forwarding

Mar 23, 2011

I have my mail application running on xxxx port in IPv6 and IPv4 enviornment on Linux machine (RHEL 5).I want to forward IPv4 request comming from windows client

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Networking :: Iptables Not Port Forwarding?

Aug 14, 2010

I have a CentOS box which is Internet Facing. It has 3 LAN's connected to it which are for virtual machines.

I want to port forward port 445 to a machine on one of the LAN interfaces. I have tried various ways to get it done, but still cannot access that port from the interface. I definately know device hosting port 445 is live, as I can ping it from the CentOS box and use lynx to access it! (It's a web server)

iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 445 -j DNAT --to-destination 192.168.0.2:445

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Networking :: Iptables Port Forwarding?

Jun 7, 2010

I've been Googling about port forwarding iptables and even though there's result and I've applied it in my script, I can't make iptables forwading request to another machine so I decided to ask help.

eth0 is my Internet Interface (1.2.3.4 is the public ip)
eth1 is my Lan Interface
eth2 is my DMZ Interface

[code]....

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Networking :: Port Forwarding 80 To LAN (Web Server)

Feb 3, 2010

I have two PC's, one with slackware and one with arch, and I am trying to access the web server from the archlinux machine but i haven't manage to do that. The archlinux machine is connect to the internet via the slackware machine via a crossover cable:
internet > eth0 (pc1) and ppp0 (the PPPoE connection, pc1) > eth1 (pc1) > eth0 (pc2)

PC1:
ifconfig eth1 192.168.0.1 netmask 255.255.255.0
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
iptables -A FORWARD -i ppp0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i eth1 -o ppp0 -j ACCEPT

pc2:
ifconfig eth0 192.168.0.2 netmask 255.255.255.0
ifconfig eth0 up
route add default gw 192.168.0.1 eth0
/etc/resolv.conf (The same DNS as the first PC)

And now the internet is working and on the archlinux machine, but I am not able to access the web server from LAN with a public IP. I tried many iptables port forwarding commands but none worked.

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Networking :: Port Forwarding With IPTables?

May 6, 2011

I have a server running debian squeeze and kvm to virtualize a Windoze box. It's setup to use NAT. This is because of limits on the network by the admin and unfortunately, there isn't a way to get around this.

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Networking :: Prerouting - Port Forwarding ?

Jul 24, 2010

Have router running Fedora 11 with eth0 - Internet (with static IP) and eth1 - LAN using IP 192.168.0.8.

I want to contact over RDP my Windows 7 machine, so I added to iptables:

But this won't work.

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Networking :: SSH Dynamic Port Forwarding

Jan 15, 2010

I've setup dynamic port forwarding using Putty, SSH and Firefox.All works well when visiting normal websites (servers listening at port 80). But why can't I visit https websites?Nothing seems to be happening when I visit those.

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