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• Can only bring up one of two interfaces

  - by mstaessen

  I'm having a bizarre issue with my HP Proliant DL 360 G4p server. It has two gigabit ethernet interfaces but I can bring up only one of them. This is starting to freak me out and that's why I turned here. I'm running the x64 ubuntu 11.10 server edition. lshw -c network shows that the second interface is disabled. I have no idea why ans how to enable it. $ sudo lshw -c network *-network:0 description: Ethernet interface product: NetXtreme BCM5704 Gigabit Ethernet vendor: Broadcom Corporation physical id: 2 bus info: pci@0000:02:02.0 logical name: eth0 version: 10 serial: 00:18:71:e3:6d:26 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 66MHz capabilities: pcix pm vpd msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.119 duplex=full firmware=5704-v3.27b, ASFIPMIc v2.36 ip=10.48.8.x latency=64 link=yes mingnt=64 multicast=yes port=twisted pair speed=100Mbit/s resources: irq:25 memory:fdf70000-fdf7ffff *-network:1 DISABLED description: Ethernet interface product: NetXtreme BCM5704 Gigabit Ethernet vendor: Broadcom Corporation physical id: 2.1 bus info: pci@0000:02:02.1 logical name: eth1 version: 10 serial: 00:18:71:e3:6d:25 capacity: 1Gbit/s width: 64 bits clock: 66MHz capabilities: pcix pm vpd msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.119 firmware=5704-v3.27b latency=64 link=no mingnt=64 multicast=yes port=twisted pair resources: irq:26 memory:fdf60000-fdf6ffff If I try to ifup eth1, then I get $ sudo ifup eth1 Ignoring unknown interface eth1=eth1. I figured that's what happens when there is no eth1 listed in /etc/network/interfaces. But when I add the configuration for eth1, I still can't ifup. $ sudo ifup eth1 RTNETLINK answers: File exists Failed to bring up eth1. I've also tried ifconfig eth1 up but without any result. For clarity, I have added a masked version of /etc/network/interfaces. I don't think it is the cause of the problem though. $ cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address 10.48.8.x netmask 255.255.255.y network 10.48.8.z broadcast 10.48.8.t gateway 10.48.8.u auto eth1 iface eth1 inet static address 193.190.253.x netmask 255.255.255.y network 193.190.253.z broadcast 193.190.253.t gateway 193.190.253.u I really need some help fixing this. It's driving me crazy. Thanks.

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• Which routers do you prefer for DD-WRT or OpenWRT?

  - by hyperslug

  I'm aware of the giant Supported Devices list. I'm wondering which ones you all prefer (e.g., support for Mega install, cheap, reliable hardware, USB port, etc.) I've used an ASUS WL-500G Premium for 1.5 years, but I've been eyeballing the WL-520gU recently.

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• IPTABLES route, redirect, forwardc traffic

  - by Anthony

  I am trying to redirect traffic from one IP reached on a specific port to a website. For example I have two external ips, lets say 194.145.63.1 and 194.145.63.2 set on one network card as 194.145.63.1 - eth0 and 194.145.63.2 -eth0:1 mywebsite.com allows access only from 194.145.63.1 and I want to set my rules like if I hit http://194.145.63.2:8080 to open mywebsite.com trough 194.145.63.1. Thanks in advance!

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• HTTP Proxypass of subdomain

  - by enedebe

  I'm trying to install a proxy on my gateway that everything that comes from a subdomain for example sub.mydomain.com goes to an inside server at a :3000 port. I'm installing a redmine server inside my network that has to be reached from outside. Any idea of how to do that? I think in httpd as proxypass, but I don't know how to get just the subdomain name to proxy it. My gateway is currently Clearos machine. Thanks

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• How can I stop SipVicious ('friendly-scanner') from flooding my SIP server?

  - by a1kmm

  I run an SIP server which listens on UDP port 5060, and needs to accept authenticated requests from the public Internet. The problem is that occasionally it gets picked up by people scanning for SIP servers to exploit, who then sit there all day trying to brute force the server. I use credentials that are long enough that this attack will never feasibly work, but it is annoying because it uses up a lot of bandwidth. I have tried setting up fail2ban to read the Asterisk log and ban IPs that do this with iptables, which stops Asterisk from seeing the incoming SIP REGISTER attempts after 10 failed attempts (which happens in well under a second at the rate of attacks I'm seeing). However, SipVicious derived scripts do not immediately stop sending after getting an ICMP Destination Host Unreachable - they keep hammering the connection with packets. The time until they stop is configurable, but unfortunately it seems that the attackers doing these types of brute force attacks generally set the timeout to be very high (attacks continue at a high rate for hours after fail2ban has stopped them from getting any SIP response back once they have seen initial confirmation of an SIP server). Is there a way to make it stop sending packets at my connection?

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• Toggle-able USB hub with more than one input and output?

  - by user74757

  I recently came across this product: http://ppa-usa.com/shared-network-hub-4-port-usb.html The only problem is, this is nearly opposite of what I need. Ideally, I'm looking for a USB hub-like device that can accept at least two devices for input, and toggle those two devices between at least 2 PC's. The hub linked above appears to be only able to accept one device. Does anyone know of such a product?

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• iptables: Allow only HTTP access for web browsing

  - by user1448260

  Have a linux box, want it locked down but just be able to surf internet on it. Why is this script blocking http too? #!/bin/sh # # iptables -F # #Set default policies for INPUT, FORWARD and OUTPUT chains # iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT DROP # # Allow TCP connections on tcp port 80 # iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT # # Set access for localhost # iptables -A INPUT -i lo -j ACCEPT # # List rules # iptables -L -v

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• I have a problem with FTP service.

  - by Diego

  HI, I follow your istruction and everythig works. I have an DHCP server than it assign "Ip client" without gateway. Internet with IE or Firefox Browser works but FTP service doesn't work. In squid.conf I have put a line: acl Safe_ports port 80 21 443 389 5307 8080 3144 8282 88 8443 20443 11438 1443 8050 30021 10443 4747 4774 1384 Have I to put gateway in DHCP Server? Have you any suggestion for me? Thanks for your help

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• Network Drivers

  - by Jason

  I have a motherboard that says: DA0S20MB6F2 on it, it was an in an iron port box. I cant get Windows to see the NICS on it. Google searching doesn't help me find drivers. Anybody have thoughts?

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• Prevent Linux from processing incoming ICMP Host unreachable packets

  - by bbc

  I have a test setup with one host on a network (10.1.0.0/16) talking via TCP to another one on another network (10.2.0.0/16) and a gateway in the middle. Sometimes, the TCP connection is lost and while scanning the trace (pcap), I looks like it's because of just one ICMP Host unreachable message sent by the gateway to 10.1.0.1 at some point. 10.1.0.1 then sends a TCP RST to 10.2.0.1. In my opinion, the gateway (pfSense) is broken or not configured correctly but anyway, for testing purposes, I'd like to block this kind of ICMP on the host (10.1.0.1) before it has an influence on my TCP connection (or does it? I'm not even sure). I've tried iptables: iptables -I INPUT -i eth0 -p icmp --icmp-type host-unreachable -j DROP but while it does a good job at preventing userpace applications like ping from receiving these ICMP messages, my TCP connection still comes to an end when the alleged "killer ICMP packet" is sent by the gateway. Am I right about how it is processed? If yes, then what can I do to achieve my goal?

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• P2V Wouldn't Boot, Rebuilt initrd, Need to Clean Up

  - by Mike Soule

  We have a CentOS 5.4 server (build 2.6.18-164.el5xen). We went to P2V this server so we can have redundancy, the physical only has one PSU. The P2V only completed 99% of the way, we have a VMWare ticket opened, but they marked the ticket as low priority. I was able to boot into a rescue disc of Red Hat 5.4 and rebuild the initrd with the help of this blog post. Now the only issue is the original server had a modified initrd, which was also from a different OS build and made by an outside provider. We do not have a document outlining modifications. My question is, is it at all possible to copy the initrd off of the physical server and replace it on the virtual and some how have the virtual machine boot? Thanks for any input. Edit: I copied the initrd img from the physical and it recreated the original issue. Here is a screen capture of the error. http://i.imgur.com/MqC73.jpg Edit2: echo Scanning logical volumes lvm vgscan --ignorelockingfailure echo Activating logical volumes lvm vgchange -ay --ignorelockingfailure VolGroup00 resume /dev/VolGroup00/LogVol01 echo Creating root device. mkrootdev -t ext3 -o defaults,ro /dev/VolGroup00/LogVol00 echo Mounting root filesystem. mount /sysroot

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• Monit Webmin service is not activating

  - by Nagaraj

  I have written a script in monit interface for Webmin service. I can execute the process wherien I am unable to restart the service. check process webmin with pidfile /var/webmin/miniserv.pid start = "/etc/init.d /webmin start" stop = "/etc/init.d /webmin stop" if failed host in1.miracletel.com port 10000 then restart if 5 restarts within 5 cycles then timeout #if changed pid 2 times within 2 cycles then aler Would you please look into this and let me know, whether I can considered the service correct or not?

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• Why do I get different openssl versions?

  - by CoCoMonk

  I'm trying to check if I have the latest OpenSSL, my main concern in the heartbleed bug. I tried 2 commands: openssl version yum info openssl openssl version output OpenSSL 1.0.1e-fips 11 Feb 2013 yum info openssl output Installed Packages Name : openssl Arch : x86_64 Version : 1.0.1e Release : 16.el6_5.14 ... I have a couple of questions: Why do I get different versions from these 2 commands? How do I check the heartbleed vulnerability without having the 443 port open?

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• Colud not open connection to the host error in telnet

  - by hima

  I need to send email from my asp.net application.For that I am using telnet tk2smtp.msn.com 25 command from the command prompt to connect to the specific port on tk2smtp but its showing Could not open connection to the host error in command prompt. I installed Telnet Client in my machine . Let me know if there are any other things to be configured for this Thanks, Hima.

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• How to link specific ports to specific domains with Apache virtual hosts?

  - by theJoe

  We have a forward-facing linux box running Apache HTTP server that is acting as a reverse proxy for several back-end servers. The servers are accessed through specific domain names and ports and are set up as virtual hosts within Apache as such: Listen 8001 Listen 8002 <Virtualhost *:8001> ServerName service.one.mycompany.com ProxyPass / http://internal.one.mycompany.com:8001/ ProxyPassReverse / http://internal.one.mycompany.com:8001/ RewriteEngine On RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK) RewriteRule .* - [F] </Virtualhost> <Virtualhost *:8002> ServerName service.two.mycompany.com ProxyPass / http://internal.two.mycompany.com:8002/ ProxyPassReverse / http://internal.two.mycompany.com:8002/ RewriteEngine On RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK) RewriteRule .* - [F] </Virtualhost> The proxy server has only one IP address, and both domains are pointing to it. Accessing internal.one via service.one works fine, as does accessing internal.two via service.two. Now the problem is that Apache does not take the requesting domain into account when accessing the virtual hosts. What I mean is that both domains work for both ports: requests for service.one:8002 proxies to internal.two:8002, and requests for service.two:8001 proxies to internal.one:8001, where ideally both these requests should be denied. I can get around this by creating more virtual hosts that explicitly deny these requests: NameVirtualHost *:8001 NameVirtualHost *:8002 <Virtualhost *:8001> ServerName service.two.mycompany.com Redirect permanent / http://errorpage.mycompany.com/ </Virtualhost> <Virtualhost *:8002> ServerName service.one.mycompany.com Redirect permanent / http://errorpage.mycompany.com/ </Virtualhost> But this is not an ideal solution, since we plan to add more services to the proxy, and each new port would need to be explicitly denied on all the other domains, and each new domain would need to be explicitly denied on all ports it is not utilizing. As we add more services, the number of virtual hosts can get out of hand quickly. My question, then, is whether there is a better way? Can we explicitly tie specific ports to specific domains in a virtual host so that only that domain-port combination is processed, and all other combinations are not? Things I’ve tried: Adding NameVirtualHost *:8001, etc. without the additional virtual hosts. Setting ProxyRequests On and Off, as well as ProxyPreserveHost On and Off Adding the server name or IP address to the virtual host header, e.g. <VirtualHost service.one.mycompany.com:8001> Using the <proxy> directive inside the virtual host directive. Lots and lots of googling. The proxy server is running CentOS 6.2 64-bit, Apache HTTPD server 2.2.15. As mentioned, the proxy server has only one IP address, and all the domains we are using are pointing to it.

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• How to configure mercurial access controls using apache and hgweb?

  - by Gj1

  I have set up a mercurial repo to be served using apache+wsgi+hgweb on OS X. It is now completely open to anyone who stumbles upon my server on the correct port number.. How can I set it up so that only people with a username+password pair that I approve can pull and/or push from the repo? I know how to very easily achieve this using ssh, but in this specific case the requirement is that the solution doesn't require defining full fledged user accounts on the machine for each person whom I'd like to give access to the repo.

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• How to detect/list rogue computers connected to a WIFI network without access to the Wifi Router interface? [migrated]

  - by JJarava

  This is what I believe to be an interesting challenge :) A relative (that leaves a bit too far to go there in person) is complaining that their WIFI/Internet network performance has gone down abysmally lately. She'd like to know if some of the neighbors are using her wifi network to access the internet but she's not too technically savvy. I know that the best way to prevent issues would be to change the Router password, but it's a bit of a PITA having to re-configure all wifi devices... and if the uninvited guest broke the password once, they can do it again... Her wifi router/internet connection is provided by the telco, and remotely managed so she can log-on to their telco account's page and remotely change the router's Wifi password, but doesn't have access to the router status page/config/etc unless she opts out of the telco's remote support and mainteinance service... So, how could she check if there are guests in the wifi with this restrictions and in the most "point and click way"? In this case I'd probably use nmap to look for other devices in the network, but I'm not sure if that's the easiest way to do it. I'm not a wifi expert, so I don't know if there are any wifi-scanning utils that can tell us who's talking to the router... Lastly, she's a Windows user as I guess that'll influence the choice of tools available Any suggestions more than welcome Regards!

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• HOw to enable shell login for particular user in one ip

  - by Master

  I have blocked FTP 21 port on server. NOw every connection will be via SFTP via ssh. Initially i had /etc/hosts.deny -- sshd:all But i had to remove that otherwise sftp was not working. How can i secure my shell login so that if someone login via root or userbac(root previleges) Then i need private key but not for other users Or any other to secure my system Thanks

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• Make website reachable through domain?

  - by Msmit1993

  I'm learning to use IIS 7 but I don't understand how I can make my website available through a domain. I have a domain as example I will call it www.test.com I have made a website in IIS, running on port 80 and can be viewed by typing the IP of the server in the address bar of my browser. So if I type www.test.com in the address bar how do I make my IIS website show up, without a redirect of course, I don't want users to see the IP in the address bar.

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• I just got a virus 6 mins ago, how? Situation.

  - by acidzombie24

  -Edit- for the people who say it isn't a virus. Norton does detect it as a virus, an icon was placed on my system tray and rkpg.exe is in my C: which was placed 6 min ago around the time my computer rebooted on its own causing me to lose data :@. Situation I on Windows XP, behind a Linksys router, I don't have DMZ on so nothing should be connecting to me. I had Firefox, MSN and Visual Studio opened. With C# I programmed a quick application to scan some pages with Internet Explorer. The site it was scanning was deviantART (which is pretty trustworthy), I doubt any banners there would hold a virus. I went to a suspicious site called freetxt.com but that was on Firefox and it didn't load the site. With an extra check I ping it and got this message "Ping request could not find host freetxt.com." The virus seems to be called braviax. Right now it brought up a message saying my computer may be infected? How on earth did it get in? I don't have uTorrent installed or any torrent or p2p applications. Nothing is installed on my computer that I haven't installed before and I know the exact time it installed because I see rkpg.exe on my C drive and my computer restarted on its own around the same time. For the previous 30 minutes actually the previous hour all I did was talk on MSN, not click any links (I went to freetxt on my own) and had that Internet Explorer thing running (which I programmed). How did it get in? I really doubt it came from a banner on deviantART and installed when I loaded the page with the webbrowser-control so something else may have happened? Is there any system defaults I should turn off? I have remote assistance off but even if it was on I shouldn't be infected due to the router not forwarding any ports?

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• How to configure a hostname of sub-application?

  - by BrunoLM

  I have a structure like this: Website |- Controllers |- Models |- Views |- Content |- Static (APP) Website is an application using an ASP.NET 4.0 pool. Static is a sub-application using a not managed application pool. On Website bindings I've set local.domain.com to have access through port 80. I want to access the Static app using static.domain.com, but I don't find the option to configure the binding. How is it possible to configure like that?

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• Can't login to Debian (OpenVZ guest) server after setting up IPTables. How to Fix it?

  - by EApubs

  I have an OpenVZ VPS server with Debian. I just setup IPTables to allow the SSH port rebooted it. (Also set the rules to auto load on startup). Now I can't login to the server! How to fix this? Here are the rules : Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpt:325 DROP all -- anywhere anywhere Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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• IIS6 Log time recording problems

  - by Hafthor

  On three separate occasions on two separate servers at nearly the same times, 6.9 hours seemingly went by without any data being written to the IIS logs, but, on closer inspection, it appears that it was all recorded all at once. Here's the facts as I know them: Windows Server 2003 R2 w/ IIS6 Logging using GMT, server local time GMT-7. Application was still operating and I have SQL data to prove that Time gaps appear in log file, not across two # headers appear at gap Load balancer pings every 30 seconds No caching Here's info on a particular case: an entry appears for 2009-09-21 18:09:27 then #headers the next entry is for 2009-09-22 01:21:54, and so are the next 1600 entries in this log file and 370 in the next log file. about half of the ~2000 entries on 2009-09-22 01:21:54 are load balancer pings (est. at 2/min for 6.9hrs = 828 pings) then entries are recorded as normal. I believe that these events may coincide with me deploying an ASP.NET application update into those machines. Here's some relevant content from the logs in question: ex090921.log line 3684 2009-09-21 17:54:40 GET /ping.aspx - 80 404 0 0 3733 122 0 2009-09-21 17:55:11 GET /ping.aspx - 80 404 0 0 3733 122 0 2009-09-21 17:55:42 GET /ping.aspx - 80 404 0 0 3733 122 0 2009-09-21 17:56:13 GET /ping.aspx - 80 404 0 0 3733 122 0 2009-09-21 17:56:45 GET /ping.aspx - 80 404 0 0 3733 122 0 #Software: Microsoft Internet Information Services 6.0 #Version: 1.0 #Date: 2009-09-21 18:04:37 #Fields: date time cs-method cs-uri-stem cs-uri-query s-port sc-status sc-substatus sc-win32-status sc-bytes cs-bytes time-taken 2009-09-22 01:04:06 GET /ping.aspx - 80 404 0 0 3733 122 3078 2009-09-22 01:04:06 GET /ping.aspx - 80 404 0 0 3733 122 109 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 278 122 3828 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 278 122 0 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 278 122 0 ... continues until line 5449 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 277 122 0 <eof> ex090922.log #Software: Microsoft Internet Information Services 6.0 #Version: 1.0 #Date: 2009-09-22 00:00:16 #Fields: date time cs-method cs-uri-stem cs-uri-query s-port sc-status sc-substatus sc-win32-status sc-bytes cs-bytes time-taken 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 277 122 0 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 277 122 0 ... continues until line 367 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 277 122 0 2009-09-22 01:04:30 GET /ping.aspx - 80 200 0 0 277 122 0 ... back to normal behavior Note the seemingly correct date/time written to the #header of the new log file. Also note that /ping.aspx returned 404 then switched to 200 just as the problem started. I rename the "I'm alive page" so the load balancer stops sending requests to the server while I'm working on it. What you see here is me renaming it back so the load balancer will use the server. So, this problem definitely coincides with me re-enabling the server. Any ideas?

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• Can joomla be configured to browser through a proxy server?

  - by Aseques

  In wordpress there are some simple variables that can be set to make the configuration of a navigation proxy server trivial. var $proxy_host = ""; // proxy host to use var $proxy_port = ""; // proxy port to use var $proxy_user = ""; // proxy user to use var $proxy_pass = ""; // proxy password to use Are there any equivalents to accomplish the same for joomla? I've been searching on internet and couldn't find anything. For the original wordpress source see here

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• Amavisd-new(2.6.4-3) failing to do "lookup_sql_dsn" when large number of emails are need to be accessed

  - by sandip

  Amavis is failing to do sql lookup when large number of emails are sent to amavis. Its throwing out error after scanning 40 to 50 email. It shows error like. (!!)TROUBLE in process_request: sql exec: err=7, 57P01,DBD::Pg::st bind_param failed:FATAL: terminating connection due to administrator command\nSSL connection has been closed unexpectedly at (eval 103) line 164, <GEN50> line 5. at (eval 104) line 280, <GEN50> line 5. As soon as this error appears in the logs, Amavis stops and port 10024 is closed. Thinking it to an error due to ssl connection in the database(postgresql-8.4), i had stopped ssl in postgres, but it was of no use. I have tried to configure amavis on another server, but i got the same error again. This happening on a production server, So i am not being able to scan emails as per user settings. Anybody have any idea, what may be the source of this error ?? Please help. Thanks in advance

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