Networking :: Ports Forwarded But No Connections Accepted
Feb 28, 2010
I'm trying to setup my debian system so that I can access it's services from the internet
I have my router set to forward ports 21, 22, and 80 to the internal ip of the server, and internet port checking tools tell me the ports are open at my external ip.
On the debian I am running Apache, ProFTPD, and SSH Server, and they all work fine for me inside the network, but whenever I try connecting with my external ip, all connections are immediately refused.
So I don't know if its a problem with my router setup, with my debian system setup, or the setups of the servers.
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Mar 23, 2011
One inconvenience I face now, though, is that I cannot tell if I have already forwarded certain messages or not, because the message is not automatically tagged as forwarded. how to set it up, so it would indicate in the list that the message has been forwarded?
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May 2, 2010
my ufw rules have been loaded and active yet using iptraf i see tcp connections on ports that were never allowed by ufw. can anyone explain this too me does ufw just not work?
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Apr 19, 2011
My firestarter is denying connections on ports 80 and 443, despite the fact that I have set rules to allow both the services, and indeed any connection from my gateway (the source of the connections).
Can someone please advise why this might be?I can surf the 'net fine, unfortunately I cannot load facebook, gmail, or another couple of sites that require logins, and I assume this is due to HTTPS not communicating properly.(On the off chance anyone can answer these real quick, I'm also trying to solve my resolution resetting every time I restart, and one of the icons in my KDE panel turning into a widget from an icon every time I restart. Still working on these, but just if anyone knows already).
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May 19, 2010
I have troubels with internet, on different Linux x64 systems on my laptop(Lenovo ThinkPad sl510), but if I load WindowsPE all is OK ( what coud it be? where to search?There is an hardwere firewall/nat/gateway in my local network, it allows only connections to dst ports tcp 80 (http), udp 53 (dns) and no frags, no icmp, deny in and etc. But Windows Internet (the same Firefox) works fine , and under Linux sites doesn't loding full or "connetion timed out"...But if I have can start downloading any file it would be downloaded full (I have downloaded DVD iso of SuSe)Dns throu nslookup responce not evry time...Decreasing of MTU to 1372 didn't help (( Deactivating ip v6 also....What coud it be? What is different betwin Windows and Linux in DNS clients is any alternative dns client in SuSe? Is the trouble only in DNS?
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Dec 5, 2010
I cant get my ubuntu machine to forward my vnc - I cant log on my windows machine running the server (it is DMZ and its ip is 192.168.1.2)Here is my firewall dump? What am I doing wrong? The important parts are connection sharing and forward allowance..
Code:
#!/bin/bash
ipt=/sbin/iptables
[code]....
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Feb 15, 2011
I'm using madwifi linux driver (ath1) in monitor mode to capture some wireless traffic. I can see that all wireless traffic is coming well through the wireless interface (checked using TCPDUMP). What I want to know is how I can forward the captured wireless packets to a different Ethernet interface (e.g. eth2) in the same machine to send those captured packet out to a different computer.
I set 1 for /proc/sys/net/ipv4/ip_forward
for iptables, I tried this rule: iptables -A FORWARD -i ath1 -o eth2 -j ACCEPT
However, I coudn't read any packet from eth2 via TCPDUMP.
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Jul 8, 2010
Mail going to invalid email addresses are being forwarded to postmaster@domain instead of being bounced. How can I fix this? postconf -d | grep mail_version gives the following: mail_version = 2.2.5
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Feb 7, 2011
have a problem with my network-manager in ubuntu 10.10.when I dial one of my vpn connections, my other vpn connections be disabled and I can't use them!I tried to restart network-manager and gnome-panel, but it does't seem to solve this problem.
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Jan 20, 2011
I've managed to set things up to the point where I can start xclock with the putty ssh terminal and have it show up as a window on my windows client rendered by x-deep32 x-server emulator. I've tried issuing the command "kdm start" but no window with a window manager pops up.
How do I get this to work so that I can control my remote ArchLinux machine through my windows client with KDE window manager?
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Feb 13, 2011
I love to submit all bugs as I know the importance that this can play for further development. When I click on Bugzilla it allows me to write information etc and I even sign in with my forum id (I know it is not necessarily correct) but I didn't know what else to do and thought it would work. When I sign in it does not reject me until the very final step of the bu reporting process.My question to anyone is how can I get my bug reports to be accepted or how can I sign in to this area of Fedora if required?
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Dec 17, 2010
I'm writting an app for desktop and embedded linux and I need to get information about the multiserial port, and I need to know which port is been used (by a printer, por example).The multiserial I'm using is an Altera Corporation Device 0004, and I just need to tell how many ports are there and how many is been used.
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Nov 29, 2010
NetworkManager? I have OpenSUSE 11.3 and broadcom wifi module. By default network are managed by NetworkManager. Wifi works great on opened access points. But when i tried to connect to WEP access point my hexadecimal key rejected. When i used ifup instead of NetworkManager the same key has been accepted. But i won't use ifup.
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Apr 5, 2011
BackupPC usually just works. It backs up the localhost and another PC, both running Debian Unstable. However it stopped backing up the remote machine after the 22nd March.This correlates with updating OpenSSH.All I get is "Unable to read 4 bytes from Server".As suggested on the backupPC website I ranCode:sudo -u backuppc /usr/share/backuppc/bin/BackupPC_dump -v -f backupclientI was asked for the sudo password and then for a password for each directory that was to be backed up.The backuppc password was not accepted. The root password was.Could somebody point me towards a solution? Do I have to recreate the SSH keys?
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Jul 5, 2011
I use a Mac, but do all my development on a remote Linux machine which I access over SSH. Recently I've started using X forwarding to show some of the remote machine's graphical applications in windows on the Mac desktop. For the most part, this works really well - except that the applications look terrible: huge fonts, ugly widgets. Being the Mac-using perfectionist I am, I want to try and improve the look of these windows. Is there any way of using alternative widgets in an X-forwarded application? What would I need to install on the Mac, or on the remote machine?
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Apr 19, 2011
We are forwarding logs (perl script executed logs) to one Red Hat Linux box. We have to get 97 logs for each time the script runs. But we see inconsistent number of logs coming to Linux box. Like one time we got 56, other time 3 , other time 43.. like this.. We are sure that 97 logs are being forwarded. Checked the Rsyslog.config filer any filters and couldn't see any filter dropping them. When we run the tcpdump, we can see 97 connections, but logs are not there in specified location.
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Jan 21, 2011
Is it fair to say that connLimit and hashlimit are very similiar on Linux i.e. while hashlimit caters to limits for groups of ports, they both set the connection rate limit per host? How in IPTables, do I configure a policy that limits connections on a port that encapsulates the total sum of all connections from all hosts? i.e. I do not want to allow more than 6000conn/minute for port range that is the sum of all connecting hosts?
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Jan 11, 2011
Just completed setting up dual monitors on my computer, it's a dual boot Debian with Squeeze on disk one and Sid on disk two. My problem is that everything is working properly on Squeeze, but any changes I make to system settings in Sid setting up my second monitor are not being accepted. I'm at a point where I have redone everything twice and with no effect, can some one point me to some effective documentation or something I can use to correct this condition.
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Mar 29, 2010
Trying to install a game and its asking for root password which i type in and it keeps coming back saying that its wrong but if i try and input the same password in when using package manager it works fine ?? and caps is off
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Aug 2, 2010
I have recently helped a friend of mine install ubuntu on their macbook which they have had since 2007 and we have run into a problem connecting to her wireless network. The WPA2 password that she uses is "invalid" while logged in under her ubuntu partition. We are able to connect to unprotected wifi networks without a problem and her home network can be accessed via OSX and my linux install on an acer aspire one (I'm running Peppermint OS at the moment). This has been a problem since day one of her ubuntu installation.
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Nov 6, 2010
For example if I run command in terminal: sudo startupmanager, my psw is accepted and startup manager is started correctly.
But if I click "System- Administration- Start Manager" GNOME asks "Enter the administrator password" and same psw as in terminal is not accepted.
My account is assign to admin group, checked via System- Administration- Users and Groups
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May 29, 2011
I did a routine update on 11.04, and after it was complete my root password appears to have changed.I have NOT forgotten it, and I'm absolutely sure that I'm typing it in correctly. More frustratingly, I know that I had to use it in order to do the update, but right after it was completed, I tried to make a small change and it was telling me that it's incorrect
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Jan 28, 2010
Installed ubuntu with dual boot Vista and installed wireless driver in ubuntu , so far so good, all accesible wireless networks comes up in the wireless list but when i want to connect to my own network it wil not accept the password and doesn't connect...
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Jun 18, 2010
I am new to CentOS, and am having a problem with authentication.The system accepts the login if the first 8 characters of the password are correct, regardless of the length of the password.My root password is 15 characters, but entering the first 8 my login is approved, which is a bit of a security concern.I think this may be something I am missing in the PAM configuration.I've experienced the behavior on SSH as well as Webmin.
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May 30, 2011
I recently installed Fedora 15 now, and during installation I set the internet connection manually, then did update and after reboot, the internet connection settings have been removed. Now I can not set because the network connection to the Internet Connection is inactive. I mention that before the update was functional internet connection.
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Mar 22, 2011
I'm ssh X11 forwarding xconsole to a Fedora 14 desktop. The font in xconsole is very large. I'd like to reduce it, but can find no means to do so. I looked at the XConsole resources file and there's no way to set a font type, or size. Man page for xconsole also has nothing in this regard. Changing the desktops DPI doesn't have the desired effect either.
I've been doing this X11 forward for years, and this is the first time I ever get a too large font in xconsole. Is there some other configuration or resource I'm missing?
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Jul 20, 2010
I am running Fedora Core 8 as my mail and proxy server. My mail works properly for all users, but the problem I'm having is that when I create an alias for user's email to be forwarded to their gmail, the ISP bounces the mail. My ISP has given me an open relay to send mail.Is there somewhere in sendmail that I could put the user name and password of the ISP, so that the ISP will not bounce the forwarded mail. Or is there something that I'm missing?
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Feb 15, 2010
I have configured 'passwordless' SSH between our machines using GSSAPI authentication which is all working beautifully (Active Directory KDC).I now want to make sure that the user's kerberos crednetials are forwarded as well using the 'GSSAPIDelegateCredentials yes' on the SSH client.However, it seems as though the openssh server on Red Hat 4.8 has not been compiled to support this, because if I run sshd in debug mode, I see the client 'delegating credentials' but nothing appears in the debug log on the server to suggest the the credentials have been received, and sure enough a quick 'klist' shows that the user does not have any tickets.So two questions:1. Am I right about openssh-server on Red Hat Enterprise 4.8 not supporting delegated credentials
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Mar 5, 2011
I have installed suse 11.3 on a USB drive and can boot from it successfully. The install was done using my desktop computer. I then booted my netbook using the usb drive, linux loads and runs fine, however when i need to enter the password to make any changes it will not accept it. I can not even access the hard disk in the netbook. I rebooted using the desktop just to check that the password I was using was correct and it worked fine.
USB drive is a 250GB western digital with only linux on it
Desktop is running Windows XP service pack 3, 4GB RAM
Netbook is running Windows 7 Starter 2GB RAM.
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Aug 16, 2010
Yes thats right. Last night I changed my logon password for better security. (have a feeling my flatmate knows it). When I tried to log in today, it wouldn't accept my password. No I know that I got it correct. I know this for a fact. So after a few tries, I decided stuff this, I am going to reset it using recovery console. But the recovery console just hangs with the following on the screen:
[4.1098198] Console: switching to colour frame buffer device 100x30
I can ctrl+alt f2, and I just get a flashing cursor. So that's it then. My ubuntu box is hosed and I am about twenty minutes away from formatting and starting again. 6 months of schoolwork, designs for architectural competitions etc all gone.
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