CentOS 5 :: Postfix + Procmail - Pop And Imap Ports Blocked By Firewall

Jul 11, 2009

Small 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"

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CentOS 5 Server :: Get Cyrus 2.3.7 IMAP Working With Procmail 3.22

Jun 9, 2009

I'm new to CentOS, having always used Slackware in the past. I'm trying to get Cyrus 2.3.7 IMAP working with Procmail 3.22, and having a slight issue. My current setup in sendmail.mc is as follows:


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CentOS 5 :: Setup Spamassassin With Postfix And Procmail?

Nov 17, 2010

I have Centos 5.5 and using Postfix, procmail and Dovecot for sending and receiving emails. I have spamassassin installed too but not configured. I am getting lots of spams. I googled a lot to find if there is any configuration but I couldn't find.how to setup spamassassin to filter emails for spams.

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CentOS 5 Networking :: All Ports Blocked Except 22 And 80

Mar 2, 2011

All 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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Security :: Get Around Isp Blocked Ports?

Sep 21, 2010

Is there anyway i can ssh/rdp/telnet into my server from the outside bypassing comcast ALL blocked ports

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Server :: Postfix + Spamassassin + Procmail + Spamass-milter - Cannot Get To Work

Feb 2, 2010

I have Postfix and Spamassassin setup on Ubuntu Server 9.10. The mail is working perfectly. Spamassassin is correctly marking messages as spam. My problem is with the milter and procmail. On past servers I was able to reject spam based on score via the spamass-milter. For whatever reason I can not get it to work. I have also tried with procmail, again, it does not work. Here are the relative lines in their respective config files:


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Server :: Sending Email To Gmail Account Via Postfix / Procmail

Feb 2, 2010

Does anyone have some quick tips on how to send an Ubuntu server's email to a gmail account via postfix/procmail?

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Ubuntu Networking :: All Ports Appear To Be Blocked?

Jun 12, 2010

I 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.

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Security :: Php Includes Blocked By Firewall?

Jun 18, 2009

If I use my current iptables firewall settings my php includes from my own site get blocked by the firewall. If I use accept all tcp and udp it still does not work. If I use a default policy of accept all, then the php includes work which is not safe. I am running a drupal 6 site on a centos 5.3 vps with apache 2.2.0 and php 5.2.6 w/ safe mode on. He is my current iptable configuration.


Chain VZ_FORWARD (1 references)
target prot opt source destination
Chain VZ_INPUT (1 references)
target prot opt source destination


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Fedora Networking :: UPnP Blocked By 12 Firewall?

Nov 28, 2009

The 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

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Ubuntu :: Ufw Firewall Setup / Other Connections Have Been Blocked?

Aug 3, 2011

I run ubuntu on home pc and am very happy with it. I use internet to surf and to see my email on gmail.com etc. What commands should I give to setup ufw firewall so that only this much is allowed? Also, where can I see if some other connections have been blocked?

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Server :: Ftp: Vsftpd With Firewall - External Ip Is Blocked Out With X

Jan 3, 2010

i have a server running vsftpd, and when i connect to it from the server itself using my externel ip address, everything checks ok, and i can browse files. but when i try to do the same on a windows computer on my network, this is what happens: [my externel ip is blocked out with x]


now mind you, my linux server is running from port forwarding from my router, which is connected to the main computer, and i have ssh and squid running as well. not sure if those two have any affect on the service. i think this is a problem with the firewall, because i have read somewhere that multiple ports need to be open for a passive ftp to work.

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Ubuntu Networking :: Cannot Access Certain Ports Via Web Browser, Outgoing Port Blocked

Aug 12, 2011

I 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.


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.

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Server :: POSTFIX Without IMAP/POP3?

Jul 25, 2011

I have installed Postfix with LDAP, Dovecot IMAP/POP3 Server on RHEL 5.5whether Postfix without IMAP/POP3 server is possible??

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OpenSUSE Network :: UPnP Blocked By SuSE Firewall?

Jan 15, 2011

I setup Mediatomb on another box in my house to connect to with XBMC. XBMC will only connect though if the firewall is off on the local machine. I have both TCP and UCP ports 1900 and 50500 (the port for Mediatomb) enabled on my laptop (local) and the correct ports are open on the remote machine (my wife's vista laptop will connect through XBMC). I can connect to Mediatomb through it's web interface (to set visible folders/files) but not through UPnP (at least not through XBMC)

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Ubuntu Servers :: Courier IMAP/POP Without Postfix?

May 10, 2010

I have installed qmail on my 10.04 server (Because I prefer qmail and dont want to use postfix) and I would like to just install courier IMAP/POP server without the Postfix (Or other mail servers).

Is there an apt-get install switch that will install just what I want to install without deps; or at least a way to block unwanted deps from being installed.

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Fedora :: Pidgin Not Connecting Properly As Internet Blocked By A Firewall / Get It To Work?

Jul 24, 2010

I am using pidgin messenger. Its not connecting properly as our Internet is blocked by a firewall. Can we do something so that it works properly

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Software :: Postfix - Delivers Mail To Unix Mailbox But Not IMAP?

Dec 22, 2010

I setup a postfix mail server. Tested it to make sure it was secure and all seemed good.I sent some test messages and see from the logs that mail is being delivered to the recipient. its only delivering mail to my user's local mbox on the linux server. IMAP appears to have its own mailbox and the two boxes are no linked. I was thinking it was an alias issue however I did at one point have the mailboxes to be the same.... now they are different... Here is the config file.... (I changed the domain names for privacy).

command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix


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Ubuntu Servers :: Setup Postfix Mail Server And Courier-imap/pop

Feb 23, 2010

Setup my postfix mail server and courier-imap/pop. My postfix server now is working with tls and saslauthd, I can send/receive email inside my domain as well as outside. However, I need two separate smtp and imap/pop3 server, I mean two machine - one with smtp function and one with imap/pop3 function working together.

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General :: Setup A Functioning Imap And Pop3 Mail Server Using Dovecot-postfix?

May 4, 2010

I'm somewhat familiar with Linux and became pretty decent at installing and configuring packages in Ubuntu. One of the things I was able to do with my tinkering was set up a functioning imap and pop3 mail server using dovecot-postfix. Now I'm experimenting with Slackware to get the feel of another distro, and I noticed that the mail server packages were already installed. On my client computer they can pick up that I have users configured and my mx record is working.

However it is failing to send mail saying that it is failing to relay the e-mail message and that the server responded 5.7.1 which was a problem that I was having in Ubuntu when first configuring the mail server. The fix was to edit the postfix.conf file and adding the localhost name of my server. Does anybody know of the file that I need to edit to make it possible to relay my messages with both pop3 and imap.

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Debian Configuration :: Firewall Up But Ports Still Open

Sep 9, 2011

I have just switched over from firestart to gufw.I have set all incoming traffic to deny and all outgoing traffic to allow.I have rules set for incoming traffic, and have only opened 1 port on my system for torrents. My router also only has the same port opened which again is for torrents.I use "Network Tools" which is included on squeeze and do a portscan of and I get all kinds of crazy ports coming back as opened. What is even stranger is if I do a few scans, these ports change, so one port on one scan may come up as open, then it will disappear and a different port may show as open.

Mind you none but the torrent port is forwarded in my router, I have no idea what any of these other ports are, or why they are even showing up.What the heck is going on? I dont think this is normal? Am I at any higher risk for attack?

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OpenSUSE :: Open Firewall Ports Without Yast?

Jan 23, 2011

how to open firewall ports without using yast. The reason I'm asking is because I'm working on a .sh script for the installation of a couple of programs. Some ports need to be open for the programs to work, I find it really annoying to go to yast and type the ports manually every time. I've looked at /etc/sysconfig/SuSEfirewall2 but can't seem to find anything, I also know that after the changes I will have to stop start the firewall by running:

SuSEfirewall2 stop
SuSEfirewall2 start

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Networking :: Setting Up Firewall/locking Down Ip's And Ports?

Jun 29, 2010

I want to lock down my server to allow only certain ip addresses and ports in. I was thinking of doing this through the iptables but someone sugguested I used the hosts.allow and deny files to allow who can access the system. What do people suggest? If I"m trying to ensure no ip's can access my system except the ones I want, how would I do this with just the allow and deny files?

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Networking :: Add Ports In Iptable /firewall Using Command?

Feb 18, 2011

I want to know how to add (ports to open)in firewall using command or scriptor any ather method

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General :: Add Ports In Firewall Using Command Or Script?

Feb 18, 2011

i need to add some ports in firewall(RHEL5) how can i do it using command or script or anything?? i know one method from graphic firewall wizzardtell me other shortcut to add more then one ports

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Software :: Firewall Ports For Mail Server?

Jan 27, 2011

Which ports should be open for a mail server for INPUT CHAIN? When I use firewall rules (allow just a few ports), some users complain that they're not receiving messages from other domains. When the firewall is disabled these ports show as open:


Not shown: 9987 closed ports
21/tcp open ftp


Which ports should be enabled?

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OpenSUSE Network :: Firewall - Can Open All Ports For One IP Address

Apr 27, 2010

I have a couple of openSUSE 11.2 machines and each is directly connected to the Internet (they are not behind a router, firewall, etc). I want them to be able to communicate without any firewall restrictions, but keep the firewall rules for all other IP addresses. Is this possible? the software package I'm trying to use randomly chooses a port to use in the range of 32768-61000 and I don't feel comfortable having a port range that wide open on both machines.

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Ubuntu Networking :: Firewall Ports For Smb Printer Sharing?

Feb 6, 2010

In my firewall I have these ports open:



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Ubuntu Servers :: Ports Not Open - Built In Firewall ?

Jul 26, 2010

I am having trouble getting ports to open, on the router that the server is connected to it is set to DMZ, so everything passing through the router should go to the server right? but when I use a port checker none of the ports that I need to be open are. so my question is does ubuntu have a built in firewall that no one told me about? or something that would block me from having the ports open?

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Ubuntu Servers :: Firewall / Router Forward Ports

Sep 8, 2010

I have linux server setup on a network with 2 interfaces. One (eth0) is connected to the regular network and the other (eth1) has a DHCP server and transparent web cache listening on it. The machines connected on the eth1 side are on a different subnet and the linux server is there gateway. Untrusted machines are introduced to this network to keep them isolated.

This isolation works well, too well. There are a small set of resources on the regular network I would like to make available to machines on untrustworthy network. I think I need to use iptables but alas I've had no luck in piecing together the command I need (in one case looking myself out and having to physically reset the machine).

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