CentOS 5 Networking :: All Ports Blocked Except 22 And 80
Mar 2, 2011All ports are blocked only 22 and 80 are open. I scan localhost and ports are open. When I scan IP address ports are blocked.I have no firewall rules.
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CentOS 5 :: Postfix + Procmail - Pop And Imap Ports Blocked By Firewall
Jul 11, 2009Small server running 5.3 - stock postfix configured to use Maildir. Dovecot configured but both pop and imap ports blocked by firewall. Access to mail is via Squirrelmail via https. Configured to virus scan via ClamAV. Works just fine. Now I want to add procmail filtering. So I create these two files - ~/.forward and ~/.procmailrc in my user home dir: "|exec /usr/bin/procmail -f- || exit 75 #mpeters"
View 1 Replies View RelatedUbuntu Networking :: All Ports Appear To Be Blocked?
Jun 12, 2010I dont know how, but somehow all the ports on my comp appear to be blocked except for 24, for ssh and 5900 unknown. I can connect to the network, but as far as I can tell, I'm powerless to do anything. No webpages load, I'm typing this on my phone.
View 1 Replies View RelatedUbuntu Networking :: Cannot Access Certain Ports Via Web Browser, Outgoing Port Blocked
Aug 12, 2011I have a vps server running certain services which can be accessed via a web browser (e.g webmin control panel), but I have recently been unable to access these services from my home machine using Firefox 5.0, running ubuntu 11.04.
Example:
I can access the server on port 80 fine, eg: [URL]
However I cannot access my webmin control panel on: [URL]
The pages takes ages to load and then times out. Same with transmission-daemon on: [URL]
Everything is set up fine on my server, the ports are open in firewall etc. and I can access these pages fine from my work computer.
This has only started happening in the last day or two and had been working fine up till then. I have not messed around at all with the firewall on my home machine. I have tried other browsers besides Firefox with same result.
Security :: Get Around Isp Blocked Ports?
Sep 21, 2010Is there anyway i can ssh/rdp/telnet into my server from the outside bypassing comcast ALL blocked ports
View 1 Replies View RelatedCentOS 5 Networking :: Port 25 Blocked Since Updates?
May 17, 2010Last night I installed all the updates that were available for CentOS. Today, I discovered that all connections to port 25 (Sendmail) are being blocked except connections coming from localhost.
I tried disabling the firewall to see if anything would change but it is still blocked.
If it is not the firewall doing the blocking, what else might it be?
CentOS 5 Networking :: Port Open - Should Be Blocked
Jul 10, 2011Recently I discovered that we were accidentally running a POP server (port 110), when we only should have been running the encrypted version thereof (port 995). This wouldn't have been a problem if the port was blocked in the first place.Isn't the default iptables setup on CentOS to block unspecified ports? Specifically, this line from /etc/sysconfig/iptables
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
Right? Well, this doesn't seem to be working for me. I added some rules to allow additional ports and commented out a couple (crucially port 110), but for some reason, port 110 is open.Here is /etc/sysconfig/iptables and the output of iptables -L below that:
# cat /etc/sysconfig/iptables
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
[code]....
Why isn't "-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited" doing what I think it should be doing?
CentOS 5 Server :: Port Configuration - Being Blocked - Iptables And Connection
Jul 4, 2009I have a fresh installation of CentOS 5 I'm using for a server, and I'm having issues with port configuration. I have iptables running, and it started with no /etc/sysconfig/iptables file. I added a few basic rules (port 53, port 10000 for webmin), saved the file, and restarted the service. I tried connecting to webmin, scanned ports, and traffic was blocked. I set iptables to allow all traffic and restarted the service, and it still showed basically every port as being blocked. It seems port 80 and port 22 work for some reason, even when I tell iptables to block all ports.
I'm not sure what's going on here. Iptables is reading the /etc/sysconfig/iptables file, and if I use lynx localhost:someport it responds as it should according to the file. However, if I try connecting by IP, it's like there's some other firewall or something running that does whatever it's configured to do.....
Ubuntu Networking :: Somehow Port 80 Is Being Blocked?
Apr 27, 2010So I set up an Ubuntu 10.04 server with apache2 installed, but for some reason I can't get to it from my browser. the iptables have all changed directories in 10.04 so I can't find the iptables. Apparmor wasn't the problem. The network hard ware is not the problem.There is something inside of 10.04 that is blocking port 80. I can ping it all day using the ip address but when I ping it useing http://ipaddress it can't find the host
View 4 Replies View RelatedNetworking :: Internet Blocked In Ubuntu 9.04?
Jul 15, 2010In my Ubuntu 9.04 installation, just a few days ago, I lost my usage of the internet. I still had internet access. Firstly though, there was a problem with the router, so I tried a friend's router (both Netgear DG834) and the friend's one worked. But in Ubuntu, I could not access any web pages or email. Skype works.
I tried using my netbook and that could access web pages okay. So then I booted my main PC into the old installation that I kept there of Ubuntu 8.04, which I am using now. And in this the internet works just fine, I can access websites and download and send email.
But in Ubuntu 9.04, it seems like something is blocking my access. I do not recall installing anything new, although something may have been updated recently. I can see the DNS servers from Ubuntu 9.04 and it gets an IP address from the router. What is the likely cause of the Internet being blocked for websites and email (but not Skype)?
Fedora Networking :: UPnP Blocked By 12 Firewall?
Nov 28, 2009The firewall in Fedora 12 seems to block UPnP by default, but opening port 1900 for UDP, as I have seen suggestedes not resolve the problem.have the following three scenarios:Firewall Enabled: Transmission cannot open a port by UPnPFirewall Enabled (1900 UDP allowed): Transmission cannot open a port by UPnPFirewall Disabled: Transmission opens a port via UPnP fineAny ideas? Yes, the port that I'm trying to open is also allowed. Router is a Linksys BEFSR41 v4.3, should you care
View 6 Replies View RelatedFedora Networking :: NetworkManager Blocked By SELinux?
Feb 15, 2011Fedora 13 64. NetworkManager tries to unlink /etc/hosts and is blocked:
Code:
SELinux is preventing /usr/sbin/NetworkManager from unlink access on the file /etc/hosts.
Additional Information:
[code]....
Ubuntu Networking :: XRDP Being Blocked By Firestarter?
Dec 8, 2010I recently installed the XRDP server on my desktop edition of Ubuntu v10.04 following the simple instructions available here. I did this on two computers. One computer has Firestarter installed while the other does not.
When I use Windows to connect to the Ubuntu box without Firestarter, everything works just fine. However, when I try to connect to the one running Firestarter, I get a pop up showing an error message (see the attached file).
I checked the incoming rules in Firestarter and I don't see a way to add RDP sessions to the list of exceptions. I also tried adding my IP address in the host section but this too didn't help the situation.
Networking :: Https Blocked By Squid / Iptables
Nov 29, 2010I connect to the internet at work through an authenticating proxy, and to avoid having to enter the proxy info into every app I use (e.g. firefox, wget, kde, etc) I have set up squid as a local transparent proxy which authenticates and routes all traffic to the work proxy. It has been working fine, but lately I haven't been able to connect to any https sites. I don't think I have changed the configuration, so perhaps it is the result of an upgrade, or something badly configured on my system from the start. I have tried connecting to https sites without squid and iptables and it works fine. My system is Arch linux, and my squid.conf file is: Code:
acl all src all
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80# http
acl Safe_ports port 21# ftp
acl Safe_ports port 443# https
[Code]....
Networking :: SSH Connection Blocked By Symantech Gateway
Oct 13, 2010In my work I am trying to connect my home server behind symantech gateway but I cannot but when I try to connect with telnet to ssh port I can make connection.How can I connect my server via ssh client.
View 11 Replies View RelatedRed Hat :: Setting Permissions On Usb Ports In CentOS 5.4?
Feb 24, 2010I am running VirtualBox on CentOS 5.4 & am not able to connect the usb ports to the guest operating systems. When I click on the device menu & usb, the devices I have plugged in show up, but are greyed out. I had this problem on Mandriva when I first started using VirtualBox & had to put my user account in the USB group. My account is in the vboxusers group but there is no USB group on CentOS & I can't figure out how to give myself permission to the USB ports.
View 6 Replies View RelatedCentOS 5 :: AFS RPM Not Installed But Ports Used By Services
Oct 7, 2009I made an standard CentOS 5.3 installation and I didn't install any AFS (Andrew File System) rpm or did any AFS configuration or any additional rpm, but I was going to use several ports between 7000-7009 and then realised that those ports were being used by afs3-* services as for instance, asf3-kaserver (kerberos authentication, which I didn't installed either). I wish to disable or uninstall those services but I don't know how and didn't find too much information about it. Why are those services appearing there?
View 6 Replies View RelatedUbuntu Networking :: Port 21 Is Blocked? Can't Connect With GFTP
Sep 18, 2010I can't seem to establish a conncction to my site (that I'm hosting in the same computer as the gFTP client- running Lucid Lynx desktop as a server). My site is 'out there', with a domain etc. and also I work on it with localhost. I wanted to use ftp as Joomla has a 'ftp layer' for files permissions etc. But it keeps saying that I can't connect, or the connection 'was reset by a peer' whatever that means. For 'hostname' I use site.com (site is my site's name) and even tried the whole thing like http://www.site.com (I clicke on 'connect to remote, and enter that in the url). or just put it where 'host' goes (when I'm not using localhost) For user name and pass, I just enter what I usually put to access the administrator's back panel in joomla, but maybe I am supposed to use what I use to log on to ubuntu when I start my computer? note sure. Anyway I used a telnet command in the terminal and found that port 21 was blocked. MY isp says they don't block any ports so I don't know. I was able to do this last year so I don't know what is so hard about this lol In the router, I have 'ftp 21 to 21 and ip address 192.168.1.100 (ip is the same for http which is working as I have my site up) now it seems to be open as I used a command at the terminal (found from google). It's open but my ftp still can't connect to my server either localhost or to my site. there is no firewall blocking it and I think my router is set right.
View 1 Replies View RelatedUbuntu Networking :: Linux Blocked On University Network
Feb 13, 2011I am facing an annoying problem with the wireless network of my university.The network is open, doesnt have wpa/wep, and once connected when requesting any page in the browser it gets redirected to a login page. Basically any pc running windows works fine, however if the os is linux-based than the pc connects just fine, it gets an ip, but the login page never loads. I have tried several browsers, several machines, even my android smartphone is locked out as well as all my friends running ubuntu, arch linux and others linux distros.The technical support never answered my email, and it's now 3 weeks that we are all without internet.
View 9 Replies View RelatedUbuntu Networking :: Http Proxies Has Blocked / How To Works Around
Jul 2, 2011Recently My ISP provider blocked any kind of http proxies can be used in browsers. When I put my proxy settings in my browser, it keeps loading with no response. I've squid proxy running on my own server and worked fine before that modification.
View 3 Replies View RelatedNetworking :: Https://hostname:8834/ Is Blocked By Iptables?
Jul 22, 2010https://hostname:8834/ is blocked by iptables ?
I have nessus application is running in the target machine and the url
is https://hostname:8834/ - which is not accessible
But when i login in the target machine via ssh and check that this application and the service is running fine So i think it is blocked by the iptables in the same machine, where the nessus is running
find the iptables status when iptables -L
iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
RH-Firewall-1-INPUT all -- anywhere anywhere
ACCEPT tcp -- anywhere anywhere tcp dpt:nessus1
ACCEPT tcp -- anywhere anywhere tcp dpt:nessus1
[Code].....
CentOS 5 :: Httpd Can't Start Due To Ports 80 And 443 Magically Being In-use / Why Is So?
Dec 4, 2009Recently I installed an SSL certificate from GoDaddy on my Amazon EC2 instance which runs CentOS 5. All has been good till I installed the SSL certificate. Everytime I restart the system it fails to have httpd service working because code...
I looked on the net and found a solution which says I should change port 80 and port 443 in files httpd.conf and ssl.conf to port 88 and 553 and restart apache, change back the ports to 80 and 443 and restart again. This method worked before but now I am stuck with it not starting with ports 80 and 443 and if I change these ports then I can't reach my site and I have to add port number wtih : which is really not good.
1- What causes this problem and where can I look to debug it?
2- What can I do to permenently stop this problem? is there any place that I can dedicate these two ports to apache user?
CentOS 5 :: Is ACPI Sending The Computer To Sleep Or USB Ports
Dec 30, 2010We have two Sangoma U100 products connected to our Acer Aspire Revo 360 (runs on Atom board). The Sangoma USB units provide connectivity to PSTN. Occassionaly and probably in a pattern they have failed every monday for the past month or so.
This is the OS version of CentOS I am running: Linux pbx.local 2.6.18-194.8.1.el5 #1 SMP Thu Jul 1 19:07:06 EDT 2010 i686 i686 i386 GNU/Linux I am wondering if this is a driver issue, ACPI sending computer or ports to sleep, or if it's something else? Any pointers would be appreciated. Following is some portions of dmesg output:
sdlausb: Attaching sdlausb on 2 (BusId 2-1)
sdla-2-1: USB device is connected!
sdla-2-1: USB device is disconnected!
sdla-2-1: USB device is connected!
[code].....
Ubuntu Networking :: Access Blocked Sites By VPN And Unblocked By Direct ADSL?
Nov 21, 2010I am in China, where some web sites(....., facebook, etc) are blocked. So I have to access these blocked site by VPN. But how can I access blocked sites by VPN and unblocked sites by my direct ADSL?
View 2 Replies View RelatedCentOS 5 :: Edit The Iptables To Include Some Ports/ip For Openfire Server?
Jun 16, 2010I am trying to edit the iptables to include some ports/ip for openfire server. The problem is the computer is very locked down with permissions...I logged in as ROOT with ID 0.Now the iptables has ROOT for permission BUT ID 1 which reflects BIN.As root i cant edit or chmod/chown the iptables. Here is what i tried:
1. change password of BIN - successfully changed with no errors BUT still cant su BIN with the new password...
2. tried changing the ID of ROOT to 1 but I dont have permission to use the command....
so anything i can do here??? I dont have permission with Shadow either...
Ubuntu Networking :: Realtek RTL8187 Wireless Usb Not Working On Lucid 10.04 ( Hard Blocked )?
May 11, 2010The device it's properly recognized and iwlist scan even list the networks, but the "activate wifi network" on the network manager on right-top of the screen it's grey and therefore cannot be activated. This seems to be the problem ( rfkill list ouput ):Quote:
1: phy1: Wireless LAN
Soft blocked: no
Hard blocked: yes
[code]....
Hardware :: Multiserial Ports Identification / How Many Ports Are There
Dec 17, 2010I'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.
View 3 Replies View RelatedCentOS 5 Server :: Configuring Piranha To Load Balance (Direct Route) 2 Ports
Feb 18, 2009I seem to be having a strange problem configuring Piranha to load balance (Direct route) 2 ports across 2 w2k3 servers in a test environment. What is strange is that 1 of the ports are working fine but the other port doesn't work. I've read many how-to and after many frustrating hours I disabled the firewall, iptables and arptables services and one of the ports are load balanced across the 2 real servers. Here's the environment.
[Code]....
I can telnet from the client to the realserves on both ports and it's works. When I telnet to the VIP only one port gets through and the other gives me "could not open connection to host port 32777 : connect failed. The configuration in Piranha for one port is the same as the other. I can't help but think that some other configuration for port 32777 was missed.
Networking :: SSH - Forward Several Ports At Once?
May 10, 2011I can successfully forward a port via:
PHP Code: ssh -L 5900:localhost:5900 test@192.168.5.1
how do I forward several ports at once. This is a wrong example but:
[Code]...
Fedora Hardware :: Tell If USB Ports Are 2.0 Ports?
Aug 11, 2010How can I tell if my USB ports are 2.0 ports?
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