Ubuntu Servers :: Can't Access A Few Addresses?
May 28, 2010
I am having an issue on my server where I can't access certain ip's erratically. These addresses could previously connect to us.I think it may be related to getting rootkitted. I know the risks in not reinstalling but we are not able to install yet at this point. I cleaned out shv4 and shv5 from the os and setup tripwire. The client can't ping the server and likewise back.From my personal computer they both respond to pings.The server is running denyhosts but that is about it in-terms of security.I can't find anyhting anywhere... No ipchains present, nothing in host.deny, subnet is 255.255.255.0.I'm really at a loss so I'm looking for some direction
I know someone is going to tell me that I have to assume all my files are compromised and i should reinstall; I did md5 checks on alot of files and there is no data on here that shouldnt get out and I check for stuff running that shouldn't be daily.The server is 10.04 server. Latest updates.Here is a list of installed packages
Code:
adduserinstall
anacroninstall
[code]...
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Jul 7, 2010
I installed Fedora 13 on my laptop today after deleting a badly screwed up Windows XP partition. Everything installed smoothly even my Broadcom drivers but I can't seem to figure out how to get Firefox to access the web with a URL.
I can ping Google, and can get to it in Firefox if I use the IP address from the ping, but going to [url] in Firefox will give me an error message about not being able to find the server at the web address. I was also able to update from the terminal with yum update just fine. I've tried searching Google for some answers, and maybe I just can't phrase my query right, but I found nothing that I could use to try and fix my problem.
I've attached a HardInfo report which I hope could be useful if you need to know what my hardware is (an HP Pavilion zv5000 laptop).
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Feb 20, 2010
I have configured squid server and it is working fine. I want that only specific ip addresses in my LAN should be able to access internet and for that I have given these entries in access control lists in squid.conf file:
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80
acl Safe_ports port 21
acl Safe_ports port 443
acl Safe_ports port 70
acl Safe_ports port 210
acl Safe_ports port 1025-65535
acl Safe_ports port 280
acl Safe_ports port 488
acl Safe_ports port 591
acl Safe_ports port 777
acl CONNECT method CONNECT
acl QUERY urlpath_regex cgi-bin ?
acl apache rep_header Server ^Apache
acl our_networks src 192.168.0.181/255.255.255.0 192.168.0.182/255.255.255.0
And in http access I have given this:
http_access allow our_networks
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost
http_access deny all
In this I want that only 192.168.0.181 and .182 should be able to access internet but Now the problem is that all the IPs in the LAN like 192.168.0.20 are also able to access internet. What changes I need to do to allow access to specific IP addresses. I am not using any firewall or iptables entries and i am manually changing in the firefox at client side to access internet.
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Aug 5, 2009
I have two nagging problems on one network which I do not have on another elsewhere, both using uptodate Debian servers. The server is on the private subnet behind a router/adsl modem. The symptoms of the one which does not work
1) Users cannot access their web site from lan. If they try, they get to the router web interface, same as if they entered http:10.0.0.138 which is the router's lan address.
2) Users cannot access smtp or pop3 service using the domain name, they can access it only using the servers LAN address.
I fear that I might have not set up the router properly because appart from that the two servers are almost identical but I do not know where I might have made an error.
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Mar 22, 2010
Does anyone know the ubuntu update servers IP addresses. I am trying to fine tune my firewall rules and was unsure of what ip addresses to use for the update servers. I believe they are us.archive.ubuntu.com and security.ubuntu.com. However, I could be wrong.
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Apr 5, 2010
I'm running a dual boot system at work. I'm connected to a few shared drives in XP, and would also like to connect to them while using Ubuntu.How do I determine the addresses of the servers I'm connected (mapped) to in XP?
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Aug 5, 2010
I'm using Ubuntu 10.4 box with Apache2 web server. I have a site with several Domain Names. How do I set up tracking?
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Jan 1, 2011
I want to display the associated host name with each address.
I've found the /var/lib/dhcp3/dhcpd.leases file, but it appears to have an entry for every time a lease was issued so it's hard to tell which ones are currently active.
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Dec 7, 2008
I am looking for a command which, when typed from the command line, returns the ip-addresses of the DNS nameservers that my ISP is using.I think is should be technically possible to write a program that does this, because linux installers set up /etc/resolv.conf correctly (as does knoppix). But I've been unable to find a command that does it. Is there one, and if so, what is it called?
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Dec 12, 2010
I have tried several places for help but I am getting no where...Here is my background.I have spent all weekend to replicate my development server back at home. I have an Apache remote server with 3 IP based virtual hosts pointing to
[URL]
Now I have been able to set up a VM on my desktop, installed the OS, the applications, the db server, apache etc. Everything is looking good so far. So right now I have,
[URL]
So when I go to 192.168.0.111, I go to [URL] so I guess apache is working aswell.What I want to do is, instead of going to [URL] I want to change it to another address such as a.me.add1How can I do this? I am looking through the virtual hosts section, I have changed server name entry etc but its not working.Can you tell me in big picture what I would need to do to set that up? My current set up doesnt really help me much once the site get the www address.tell me if Document Root of IP address 192.168.0.111 points to [URL] will it always resolve into that webaddress. That is if I enter 192.168.0.111 the browser will redirect it to [URL].
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Dec 23, 2010
I'm trying to limit access to port 8443 on our server to 2 specific IP addresses. For some reason, access is still being allowed even though I drop all packets that aren't from the named IP addresses. The default policy is ACCEPT on the INPUT chain and this is how we want to keep it for various reasons I wont get into here. Here's the output from iptables -vnL
[Code]...
Note the actual IP we are using is masked here with 123.123.123.123. Until I can get everything working properly, we're only allowing access from 1 IP instead of 2. We can add the other one once it all works right. I haven't worked with iptables very much. So I'm quite confused about why packets matching the DROP criteria are still being allowed.
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Oct 26, 2010
My Firestarter logs show periodic outgoing connection attempts to IP addresses in countries such as Malaysia, China, Russian Federation etc... Fortunately, Firestarter appears to be blocking them. I suspect these are not good and want to find out exactly what process is initiating these outgoing connections.
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Mar 15, 2010
This is the current setup that we have: We have approx 20 clients who pay us to send out a type of e-mail called an E-Blast to their customers. We currently are using 5 Microsoft Windows Virtual Servers to do this. The problem is that those machines are starting to break down. There are times that it will take Microsoft Windows approx 9-10 hours to complete 1 job. This is way too long. We want to move away from Microsoft Windows for this particular type of job as it seems there are more customers who are wanting to use this type of advertising.
It seems that using a Linux Server "Command Line or Shell" environment would be the best way to go as there is no GUI like Windows. Since there is just text...that is something that would/should process very, very quickly.
I am in the process of setting up a new SMTP outbound mail server. This is the current software & configuration (what is installed on this new machine):
All of the customer data (Names, E-Mail Addresses, etc that these e-mails are going to) are currently loaded in a Microsoft SQL Database.
My machine that I am using is plugged into the DMZ. I have 1 ip address for the 1 network card. I have also added/bound 4 more ip addresses to that network card.
I have configured Postfix for Multiple IP Addresses.
I can, from the command line, send successful test e-mails and receive them in my personal account.
As far as I know everything is setup correctly. I can and will post requested information so that it can be verified that everything is setup correctly.
Here are a couple of my questions:
Ensure that I have my Network / Interfaces file and my Postfix's Master.cf/Main.cf files setup correctly?
How can I setup this server to be an Outbound SMTP server and get it to use all 5 of the IP Addresses to send these e-mails quickly?
What can I use to check and ensure that this server is in fact sending out emails on all 5 IP
Addresses (I heard that there is a program named "Postal" that may help in determing this).
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Jun 9, 2009
I'm in the process of setting up a script in perl to make 1,000's of curl calls to my companies application on our test server. Our software does all sorts of tracking of data based on IP addresses using geoIP, so i was wondering if anyone knew of a way to fake these addresses to the server?I know a big issue with the IP faking is the return path but i dont really need this. I also cant do it on the hardware level since the script is going to be picking lots of different IP's at random.Anyone have any idea if this is possible and if so, are there any known libraries i can use for this? I prefer perl but any Linux compatiblie scripting language is fine.
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Mar 31, 2011
I have a CentOS5 server with dual ethernet adapters + Webmin installed as my Router / Firewall / DHCP server working successfully with 1 static IP from my ISP. I also have 7 additional static IP addresses from my ISP needing to configure to individual servers inside my network. I have configured the additional virtual interfaces, but am lost on how to route data specifically from additional ISP address to specific internal network address.
Below is my desired configuration.
98.173.159.xx1 = eth0 physical interface ==> eth1 192.168.1.1
98.173.159.xx2 = eth0:1 virtual interface ==> 192.168.1.10 ==> CentOS Server 2
98.173.159.xx3 = eth0:2 virtual interface ==> 192.168.1.20 ==> CentOS Server 3
98.173.159.xx4 = eth0:3 virtual interface ==> 192.168.1.30 ==> CentOS Server 4
98.173.159.xx5 = eth0:4 virtual interface ==> 192.168.1.40 ==> Mac OS X Server 1
98.173.159.xx6 = eth0:5 virtual interface ==> 192.168.1.50 ==> Mac OS X Server 1
98.173.159.xx7 = eth0:6 virtual interface ==> 192.168.1.60 ==> Network Attached Storage Server 1
98.173.159.xx8 = eth0:7 virtual interface ==> 192.168.1.70 ==> Windows 2008 Server 1
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May 31, 2010
I am planning on installing an Apache server today. I know how to get it to point to addresses like "localhost" or my outside ip, but how do I get it to point to a URL like [URL]? (That's just an example URL)
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Mar 26, 2010
I'm having a problem with my webdav share. I have a secure webdav folder that gets accessed via a non-standard port and requires basic authentication. I can connect and interact with it fine via cadaver. However, when I try to connect from nautilus, it says "Access was denied." To make it even stranger, sometimes I can click on the folder in nautilus (it still mounts) and access it. Sometimes not (just repeats the error message and won't show me the contents). I may not even un-mount it, but just look at other folder, then click it again and be able to access it, but again - only rarely.
I asked a friend to try connecting from his windows vista computer and it would not work. It would not work from my windows XP virtual computer either. However, it mounts and works just find from my work computer (also Windows XP).
So it seems to be a 50/50 chance that the drive will mount on any given computer/system and work. Do anyone know what the problem may be? I'm guessing user permissions, but I can't figure out what.
I've made sure the webdav folder is owned by www-data and www-data has read access to the password file as well.
When I try connecting from nautilus, I get this in the log file:
Code:
Here is one of the (many) sites I've tried looking at: [url]
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May 10, 2010
i found this video, and i really want to do the same. *newbie needs to learn [URL]...my question is, what need to be installed and how?
is there any specific configuration to make it works?
and will it work if i want to connect from Ubuntu to Fedora ?
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Jan 30, 2010
I installed 6.06 LTS on Virtual box and I cannot access the netPlease let me know what I must look for.I am new to linux as well
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Jun 13, 2010
Every time I try to mount a folder from my server, it ignores whatever folder I specify and just mounts the first folder in the exports file.I used to be able to mount more than one nfs folder, so I don't understand what is going on. Google isn't helpful.
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Jul 15, 2010
I am a Newbie to Server platform. Just installed Ubuntu 9.04 server, As my Lappy not supporting OEL 4. I was shocked to see that there is no GUI. Anyhow, in that it is showing to Login. I enter the Username and password which was created during Installation on Ubuntu server. It was fine. How to goto Root?
I typed su - root and entered password
Says Authentication failure.
How can I overcome this? While Installation where ever it asks for a password I use the same one.
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Sep 1, 2010
just switched our company from windows server to linux and everything is going good except we have 4 vpn connections though out the country coming to our server. All giving the client machines ip addresses of 192.168.x.x based on where they are located 192.168.1.x for the main location 192.168.2.x for a second location etc, and IIS could see the clients ip instead of the wan ip and was setup to block all ips except 192.168.x.x ip's and this worked great.
So i set up apache the same way, to allow only 192.168 ip's but i guess it doesn't work that way in apache for connections coming though vpn? 2 out of our 4 VPN connections are not static IP's, so the 2 that are I just add that ip to the allow list and that worked.But i don't think we should HAVE to get static ips for the other 2, that's one of the benefits of using VPN, especially if our old windows server didnt need it.Is there any way for apache to see the clients ip address for access or is there something somewhere else that needs changed for this?
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Sep 4, 2010
I had followed this Guide to get proftpd with mysql on a Ubuntu server edition the last one available to download 10.04.1I did everything. phpmyadmin is working I can access it via the browser and create users and groups.When I am trying to enter my server using the ip or the domain name I am getting an instant error.Flash fxp's error log
Code:
[R] Connecting to 192.168.25.117 -> IP=192.168.25.117 PORT=21 (attempt # 2)
[R] Connected to 192.168.25.117
[code]....
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Oct 7, 2010
I'm running Ubuntu Server 10.04 32-bit.I'm looking to find if there is anyway I can lock down ubuntu so that remote access, whether it be SSH, ftp, apache.etc can be only accessed from a certain IP range, or a certain set of IPs?Essentially, we'll say the Server IP is 192.168.1.32, and I want the IP addresses 192.168.1.33-50 to be able to access the server, but no other IPs.I am in a switched environment, router's are not allowed to be placed on the network, and I do not have access to a DNS or DHCP server.Is there a way to do this in on the server via a configuration of some sort?
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Jan 10, 2011
I've got VPN setup and working on my server. I can VPN into the server and access my local network from anywhere. It uses pptpd for it. My problem is that I can't access the internet once I'm connected to my VPN. Is it possible to allow internet access through VPN?I mainly would just like to be able to connect, access my local network, and still browse the internet. Is there anything specific I need to change?
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Apr 3, 2011
I installed vsftp on ubuntu10.04.2 32-bit server. I can access ftp remotely by using ftp client tool -- Filezilla, but can't access ftp site from web browsers (tried on both IE8 & Firefox). when type ftp://xxx.xxxx.xxx, the browser has no response.
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Apr 25, 2011
I'm working to set up my first server to experiment hosting my own web pages. I have installed Ubuntu 10.04 server. my web only can access by typing www.xxxxxx.com, if we not typing www (xxxxxx.com), it will not responding.
how to access my web without type www, ?
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Jul 17, 2011
I am trying to set up my 11.04 ubuntu install so that php can access ms-sql servers. I have done this twice before once with ver 9.10 and centos 5. So I figure I would follow the same steps again as I did last time. but its not working this time around. I get to building php and get the following error. I do not often build packages as I dont know much about it so I figure I have missed something some place. Can anyone tell me what this means and a clue to where I can find the fix.
>> dpkg-buildpackage
dpkg-buildpackage: export CFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export CPPFLAGS from dpkg-buildflags (origin: vendor):
dpkg-buildpackage: export CXXFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export FFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export LDFLAGS from dpkg-buildflags (origin: vendor): -Wl,-Bsymbolic-functions
dpkg-buildpackage: source package php5
[Code]...
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Jan 16, 2010
I have an Ubuntu 9.10 server and I recently noticed that when it starts up I see the following displayed
* Starting init crypto disks..
* Could not access PID file for nmbd
I don't know where the message "Could not access PID file for nmbd" it doesn't appear to be coming from samba because samba is starting later in the startup. I've had no issues with samba and I can restart samba with no issues. Is this something to be concerned about? I noticed it started after I upgraded my samba server.
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Feb 5, 2010
I set up mod_proxy in order to get rid of :8080 now I cant access phpmyadmin through the browser. what is the quickest way to turn off mod_proxy and access phpmyadmin? I would like to optimize the tables and back up the sql file. I just need to turn it on for a bit, and then enable mod_proxy again.Right now, if I got to localhost/phpmyadmin, it redirects to the main application.
I have used a2enmod, and added
sudo a2enmod proxy
sudo a2enmod proxy_http
sudo a2enmod proxy_ajp
[Code]...
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