Networking :: Router - How To Find Port Number For Web Management
Aug 1, 2010
I enabled D-Link (DSL-502T) router web management (I am aware of security implication). I was able remotely to login to the router (by typing http://23.45.xx.6y) before changing the default number 80. Then I changed the port number from the default value 80 to 21908 (https option is not available) for better security, and when I tried to login to the router by typing this :
http://23.45.xx.6y:21908
Yes I am aware that if I am physically near to the router then I can check that , but this is not the case with me. How can I make sure that I had changed port number form 80 to 21908? Does NMAP do a trick to reveal which port is used for web management ? or are there other better options?
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Jul 6, 2010
I am trying to do my graduation project, it's labeled under "linux secure router", and I should build a linux based router equipped with firewall and ACL management...Some people advice me to use linux ubuntu distribution todo this I try to do that but I don't know where to start form
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Jun 20, 2009
I am running lmgrd on CentOS5, but it returns Failed to open the TCP port number in the license. The port is 27000, how can I open that port?
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Sep 24, 2010
I'm trying to grok a problem I'm having with an embedded machine. I'm pretty sure I can track down the larger problem, but I came across a usage of ifconfig that I don't understand, and I'm pretty sure this is the command that is failing.
The command is: ifconfig eth0 192.168.78.20:9134
I understand how ifconfig works. What I don't understand is the :9134. I can't see anything in the docs about what this means. I know in most contexts it's a port number, but what does it do when bringing up a network interface? Does it limit it to only using port 9134?
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Sep 30, 2010
I have 3 gateways in my office. I want to redirect all web traffic (port 80 and 443) through one gateway and ssh connections through other one. All machines have single network interface. For this what I did is created an ip alias et0:1 and assigned ip to it. Then wrote an ip route rule to route packets from eth0:1's ip to other gateway. All other traffic will go through default gateway. But here I am not sure how I can make web browser to use eth0:1's ip. It's using eth0 's ip. I wrote a ip table rule to change source ip of http packets to et0:1's ip. But rule is on POSTROUTING chain. So I think it's happening after routing.
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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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Mar 28, 2010
I'm not that great with mailservers, and just been thrown a curveball with a MS Exchange environment for which there is apparently no solution... yeah, right. But is there a workaround?
The problem is that the site mail (SMTP) needs to be sent via port 26 instead of the commonly used 25. Port 25 is mapped to a mailfilter, which apparently causes havoc with some of the mail, and the techs that have been on site trying to coax the Exchange server to co-operate have said that the only way would be to get rid of the filter.
The problem is that there are number of apps that are unable to have the outgoing port changed and so keep sending mail out on port 25.
I look after the Unix/Linux side of things at work, and I was wondering if there was an easy way to set up a Ubuntu box to receive mail on port 25 and just forward it to the MS box on port 26? So, in other words (and I hope this makes sense): monitor port 25, and forward whatever comes in on port 25 to the server on port 26. Simple portforwarding, or is it? What steps do I need to take?
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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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Dec 16, 2010
I have an n900 phone and I'm trying to ssh to my desktop but I'm getting an error:
ssh: connect to host 58.xx.xx.xx port 22: Connection refused
I recently started using a router for I wanted to connect to net even with n900. I've tried to open the port from the setup page of the router however it doesn't seem to work. (find below the screenshot of setup page).
I've tried to ssh through slackware I've got as a virtual machine and I have the same problem although I was able to ssh through slackware before I started using the router.
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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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Jan 26, 2010
I am trying to make a vnc connection from pc #2 to pc #1. Pc #1 is a debian pc behind a zyxel router (P-2602HW-D1A). Pc #2 is a windows xp pc another place at the internet.I have configured the zyxel router to forward incomming trafic on port 5902 to the local ip-adress of the debian box. The debian box is running a vnc server, listening on port 5902.But i dosn?t work.I have tryed to scan the zyxel routers ipadress on port 5902 from the internet, but the scanner says that the port is closed.The vnc server on pc #1 is working fine on the local network. I can connect to the server from a pc on the same side of the zyxel router.Is it deffenitly a router problem, or could it have something to do with debians own firewall?
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Mar 1, 2010
I changed to a 4 port ethernet router (D-Link DSL-2542B Adsl2+)with intention to share Internet access with my brother (he's on Vista).Initially it all went well,but 3 days ago there were connection problems occured on the part of the ISP. Without realized the problem,I had reset the router.This morning I've been informed by the ISP that the connection has been re-established.So,I accessed the Internet via the 4 port router but failed to do so (server not found).Suspecting that the problem was from the 4 port router,I reverted to my old Adsl router (DSL-520B single port) and without any problem I managed to access the Internet back.I really need help to configure back the 4 port ethernet router to its initial state.
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Mar 12, 2010
how i can open port 4444 in my system and in the router of my ISP cuase i used it to download and i dont to be blocked from ISP
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Jul 8, 2010
I have a newer Belkin N+ router that has a USB port for accessing an external hard drive.I can access the HD with no problem in Windows.I am new to Linux/Ubuntu and cant seem to connect to the HD. In "Network" I have a folder "Windows Share" and within that folder is where I see the HD "CBHD" (name of my drive). I cant click it because when I do, i get an error message along the lines of (cant remember exactly right now) "Failed to mound"I typically access the drive in Windows via : \192.168.2.1
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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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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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Jun 27, 2010
I'm trying to get online on my laptop, I just installed Ubuntu 10.04 (Side by side with Windows 7.) I'm looking over the networking help files, as well as the troubleshooting and nothing seems to be working. [URL]. From this troubleshooting guide it tells me to open the terminal and type the command "sudo lshw -C network" and when I do, it asks me for my password but when I try to type it, nothing comes up. So I run it without typing sudo. It says "*-network DISABLED" which in the troubleshooting guide means that my router is off, but I'm clearly online on this computer as of right now.
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Feb 3, 2011
It says my routor's name and signal strength but when I try to connect it tries for a while and then fails.
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Sep 1, 2011
My PC is connected to a HW router which in turn is connected to a modem
Code:
internet-----modem----router----PC1
Is there a console command (e.g. in telnet) to get my external (public) IP?
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Jan 16, 2011
I recently installed Ubuntu via "wubi", and tried to set up the Wireless. After looking at a few threads, they suggested using an Ethernet cable to troubleshoot the problem. However, my laptop does not detect the router even via an Ethernet cable. I am running 64 bit(It auto-downloaded with wubi) on an Acer Aspire 5553G, and my router is a Netgear DG834G. I have an Atheros AR8151 PCI-E Gigabit controller, a Broadcom 802.11n Network adapter and TAP Win32 Adapter V9.
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Feb 8, 2010
To start off I have a Rosewill rnx-n2x wireless adapter and a Dlink 4500 router. The problem is, the wireless network manager detects every wireless router in the neighborhood, except mine. I see this persons, and this persons, but no "My router Not yours". I even tried doing the hidden network setup and still nothing.
I have read that the rnx n2x isnt supported by linux, although I've seen solutions to make it work (which didn't work, mkdir command kept getting denied during make) link to what I'm talking about: [URL]. What I don't get though, is that if the rnx n2x isnt supported by linux, wouldn't I not be getting my neighbors connections to begin with?
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May 1, 2010
im trying to open my NAT on my PS3, and it's asking for my primary DNS, secondary DNS, and default router. how will i find these on ubuntu? i got my ip and subnet mask, just need the other three.
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Apr 15, 2010
How can I find the PID for all processes running for a particular port?
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Apr 4, 2011
just switched from Windows Vista to Ubuntu 10.10 on my Toshiba laptop and I'm loving it, except for some wireless connection problems. About 70% of the time, my computer is unable to find any wireless signals whatsoever, despite being right next to the router. When it does find the signal it connects fine and runs great, but most of the time it doesn't show any signals at all. I can't find any pattern to when it does or doesn't find the signal. My result for the "sudo lshw -C network"
[code]...
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Feb 18, 2010
I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused
while
nc -v -w2 -z localhost BBBB
[code]....
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Jan 12, 2011
im using CentOS 5.2 and cant change my default ssh port number. I have edited /etc/ssh/sshd_config to this
Code:
#$OpenBSD: ssh_config,v 1.21 2005/12/06 22:38:27 reyk Exp $
# This is the ssh client system-wide configuration file. See
# ssh_config(5) for more information. This file provides defaults for
# users, and the values can be changed in per-user configuration files
[code]....
I have then restarted ssh by typing (as root) "sbin/service sshd restart" and it restarts fine but still is on 22 and not 222.
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Jan 16, 2011
i have installed CentOS along with ISPConfig. For some reason apache will not run it says there are no listening sockets avaliable. I have done a netstat and also tried nmap to see if any other service was using port 80 but it doesnt show anything. I also tried changing the port number to something like 81 still no go. On bootup of CentOS it shows the error and a message saying unable to open logs.
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Mar 17, 2011
How do I get FTP to use a specific port number? .. I read the manual but cannot work this one out.
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Sep 17, 2010
Is it possible to setup SSH Daemon to listen on multiple ports and only accept specific groups to a given port? In the past I've created a second SSH Daemon by copying the config file and /etc/init.d/ daemon then configuring each port separately / rules however if I was able to maintain just the one Daemon that would be optimal. Is this possible?
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Feb 7, 2010
Is there a way to change the port number that Evolution uses for pop server access? I am trying to access my Gmail through their pop server but they default to a different port number.
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