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• repeated failing passwords in linux security log (/var/log/secure)

  - by wallyk

  Recently, I opened up the SSH port through my firewalls (and redirecting to my server) so I could check on the (http) server while on the road. The first week or two there was nothing different. But now, three or four weeks later, I see lots of this: Mar 20 08:38:28 localhost sshd[21895]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=mail.queued.net user=root Mar 20 08:38:31 localhost sshd[21895]: Failed password for root from 207.210.101.209 port 2854 ssh2 Mar 20 15:38:31 localhost sshd[21896]: Received disconnect from 207.210.101.209: 11: Bye Bye Mar 20 08:38:32 localhost unix_chkpwd[21900]: password check failed for user (root) Mar 20 08:38:32 localhost sshd[21898]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=mail.queued.net user=root Mar 20 08:38:34 localhost sshd[21898]: Failed password for root from 207.210.101.209 port 3729 ssh2 Mar 20 15:38:35 localhost sshd[21899]: Received disconnect from 207.210.101.209: 11: Bye Bye Mar 20 08:38:36 localhost unix_chkpwd[21903]: password check failed for user (root) Mar 20 08:38:36 localhost sshd[21901]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=mail.queued.net user=root Mar 20 08:38:38 localhost sshd[21901]: Failed password for root from 207.210.101.209 port 4313 ssh2 Mar 20 15:38:38 localhost sshd[21902]: Received disconnect from 207.210.101.209: 11: Bye Bye Mar 20 08:38:40 localhost unix_chkpwd[21906]: password check failed for user (root) Mar 20 08:38:40 localhost sshd[21904]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=mail.queued.net user=root Mar 20 08:38:42 localhost sshd[21904]: Failed password for root from 207.210.101.209 port 4869 ssh2 Mar 20 15:38:43 localhost sshd[21905]: Received disconnect from 207.210.101.209: 11: Bye Bye Mar 20 08:38:44 localhost unix_chkpwd[21909]: password check failed for user (root) Mar 20 08:38:44 localhost sshd[21907]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=mail.queued.net user=root Mar 20 08:38:46 localhost sshd[21907]: Failed password for root from 207.210.101.209 port 2512 ssh2 Mar 20 15:38:47 localhost sshd[21908]: Received disconnect from 207.210.101.209: 11: Bye Bye Mar 20 15:38:57 localhost sshd[21912]: Connection closed by 207.210.101.209 There are about 1100 lines of these for March 20th, zero for the 19th, and 800 or so for the 18th—all related to the same IP. What does it mean? What should I do? Why isn't it chronological?

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• why use ssh tunneling for mysql server?

  - by ajsie

  i've got ubuntu server acting as my lamp server for my php websites. mysql server is installed and opened for the localhost port. i have read about how to tunnel through ssh to my mysql server. but i havent understood why this is better than opening the mysql server directly for the internet port. cause in either way, a hacker could brute force the port for passwords. either mysql port (3306) if opened for the public or ssh (22) if using tunneling. so why is it better to use ssh tunneling for mysql (and many other server applications)?

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• Network Printer or Share Printer on Server?

  - by Joeme

  Hi, Small office, <10 users. USB printer which also has a network port. Is it better to share the printer by plugging the usb into the sevrer, and do a windows share, or use the built in network port? We are using the built in network port at the moment, but don't have control to delete jobs in the queue that get stuck. Thanks, Joe

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• Cisco 837 not passing UDP traffic properly (was: DNS query problem)

  - by TessellatingHeckler

  We have a setup of ADSL line - Cisco 837 ADSL router - Zyxel ZyWall 35 firewall/NAT - Switch - LAN. It has been fine for years, suddenly DNS resolution stopped working from the LAN to public DNS servers. No changes that I know of, so I can't revert anything. Current behaviour: DNS requests from the LAN using TCP show up in the oubound firewall log, in the Cisco debug log, in the dns-server-firewall, in tcpdump on the DNS server, the answer comes back, it works fine. DNS requests from the LAN using UDP show up in the outbound firewall log, in the Cisco debug log, but does NOT show in the dns-server-firewall, not in tcpdump on the DNS server, times out. DNS requests from the Cisco using UDP show up in the dns-server-firewall and in tcpdump on the DNS server, answer received, works fine. netcat connections to port 53 or a random port by TCP show up in the dns-server-firewall netcat connections to port 53 or a random port by UDP do not show up in the dns-server-firewall Summary: TCP seems fine throughought. UDP works from the Cisco over the ADSL, and it works from the LAN to the Cisco, but it doesn't seem to cross the Cisco 837 properly. Update: confirmed with netcat that any UDP traffic from the LAN is affected, not just traffic to port 53. Update: If I change the firewall's external IP to any other IP in the subnet, this starts working. When I put it back, it stops working. I now suspect it's an ISP issue (does that sound plausible?), and am removing the Cisco config.

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• Setup Linksys 3200 remote access

  - by Greg

  I'm trying to setup remote access for my linksys 3200 so that I can configure it through the WAN port. I have turned on remote access, however when I try to connect I get a 404 error. The settings I have are: When I try to access xxx.xxx.xxx.xxx:9999 I just get a 404 error. I have allowed RDP access to a computer behind the router and this works fine on the same IP address. Any idea's on what else I have to do to allow remote management access? UPDATE: I tried changing the port to 80 and it works. Change it back to any other number and it doesn't work. Modem is setup with a DMZ to the router's IP. Why does it only work on port 80? BTW I can't use port 80 because there is a website hosted behind the router.

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• Multiple syslog-ng destination loghosts

  - by pablo808

  I am currently forwarding logs to one remote destination loghost. filter f_windows { program("Security-Audit*"); }; log { source(r_sys); filter(f_windows); destination(d_windows); }; log { source(r_sys); filter (f_windows); destination(d_loghost); }; I would like to forward these logs to two additional remote destination loghost's. The manual defines destination syntax as: destination <identifier> { destination-driver(params); destination-driver(params); ... }; Tried these different configs: Define additional destinations hosts in d_loghost: destination d_loghost { udp("server1" port(514)); udp("server2" port(514)); udp("server3" port(514));}; filter f_windows { program("Security-Audit*"); }; log { source(r_sys); filter (f_windows); destination(d_loghost); }; Define addtional destination hosts in their own d_loghost definitions: destination d_loghost1 { udp("server1" port(514)); destination d_loghost2 { udp("server2" port(514)); destination d_loghost3 { udp("server3" port(514)); filter f_windows { program("Security-Audit*"); }; log { source(r_sys); filter (f_windows); destination(d_loghost1); }; log { source(r_sys); filter (f_windows); destination(d_loghost2); }; log { source(r_sys); filter (f_windows); destination(d_loghost3); }; Both fail unfortuantly, what am I missing? Thanks.

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• PXE booting LACP hosts on Force10 S50N with FTOS

  - by lolwutreddit

  Hardware: S50N Firmware: FTOS 8.4.2.6 Problem: We're trying to PXE boot some servers that are connected via port-channel interfaces with LACP. Current Work-around: we PXE boot a server with a single interface (eth0), and then use a Perl script to turn up the port-channel interfaces after the server is built. Details: Is anyone doing anything similar on Force10 S50 switches with FTOS? If not, is anyone doing this on another S series, or larger chassis-based Force10? I'm wondering if Native VLAN will solve this, since ports in a port-channel cannot explicitly have a VLAN set, and they don't seem to use the tagged or untagged VLAN that the port channel is in. I will confirm this next (I think it's the only thing I haven't tried) Juniper Example: http://broken.net/openindiana/how-to-pxe-boot-systems-on-lacp-using-juniper-switches/ Cisco: there are plenty of documented ways to solve this issue on IOS and Nexus Update/Edit: since there seems to be no way to use interface or port-channel mode commands to get the individual interfaces to show up in spanning-tree (rtsp in this case), the ports should never go into a forwarding state. I'm not going to mess with it anymore unless a) someone that has experience passes it on, or b) Force10 comes up with a solution for this (I'm guessing it will only be introduced on other S platforms (S55, S60), since the S50 seems to be near EOL). I'm basing that on the fact that the Open Automation type features are only being supported on the newer switches.

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• ESXI 5.1 - Unable to trunk to cisco switch

  - by Lance

  I have configured my esxi host vSwitch1 to use the secondary NIC on my VMware host. On vSwitch1 configuration I have set the VLAN to 4095 which specifies to allow all VLANs. If my cisco switch port configuration is set to an access port my server can ping the vlan interface on the switch. If my cisco switch port configuration is set to a trunk, whilst it stays UP UP and CDP information is available, I lose my ping from VMware VM server to the local vlan interface on the switch and I lose any server connectivity to my network. Switch NIC teaming policy to Route based on originating virtual port ID Configuration based on: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006628 interface GigabitEthernet0/42 description Host Port switchport trunk encapsulation dot1q switchport trunk allowed vlan 18,220 switchport mode trunk switchport nonegotiate spanning-tree portfast trunk end Output from ESXI CLI esxcfg-vswitch -l: ~ # esxcfg-vswitch -l Switch Name Num Ports Used Ports Configured Ports MTU Uplinks vSwitch0 128 5 128 1500 vmnic0 PortGroup Name VLAN ID Used Ports Uplinks VM Network 4095 1 vmnic0 Management Network 4095 1 vmnic0 Switch Name Num Ports Used Ports Configured Ports MTU Uplinks vSwitch1 128 4 128 1500 vmnic1 PortGroup Name VLAN ID Used Ports Uplinks VM Network 2 4095 1 vmnic1 Any tips welcome!!!

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• can not connect through SCP, but SSH connections works

  - by Joe Cabezas

  i am trying to connect to my server to transfer file using scp: $ scp -v -r -P <port> <user>@<host>:~/dir/ dir/ this is the output: OpenSSH_5.2p1, OpenSSL 0.9.8r 8 Feb 2011 debug1: Reading configuration data /Users/joe/.ssh/config debug1: Reading configuration data /etc/ssh_config debug1: Connecting to <host> [<host>] port <port>. debug1: Connection established. debug1: identity file /Users/joe/.ssh/identity type -1 debug1: identity file /Users/joe/.ssh/id_rsa type -1 debug1: identity file /Users/joe/.ssh/id_dsa type -1 ssh_exchange_identification: Connection closed by remote host but connecting via SSH works fine: $ ssh <user>@<host> -p <port> <user>@<host>'s password: <user>@<host>:~$ OK what can be wrong with this? my /etc/ssh/sshd_config file on the host is: # Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for Port <port> # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key HostKey /etc/ssh/ssh_host_ecdsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin yes StrictModes yes RSAAuthentication yes PubkeyAuthentication no #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes

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• MacPorts, how to run "post-destroot" script

  - by Potatoswatter

  I'm trying to install MacPorts gdb; it seems to be poorly supported… Running "port install" installs it to /opt/local/libexec/gnubin/gdb, but the intent doesn't seem to be to add that to $PATH. The portfile doesn't define any parameters for port select which is typically used to set a MacPorts installation to handle default Unix commands. But it does include these lines: foreach binary [glob -tails -directory ${destroot}${prefix}/bin g*] { ln -s ${prefix}/bin/${binary} ${destroot}${prefix}/libexec/gnubin/[string range $binary 1 end] } This is buried under an action labeled post-destroot. destroot is a MacPorts command but post-destroot is not. The script is apparently not run by port install or port activate, or if it's failing it's doing so silently. Is there a better approach than creating the links manually?

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• SSH tunnel over http proxy with blocked 443 (SSL)

  - by Evgeny Zhulenev

  Is it possible to create an SSH tunnel over http-proxy when https access is denied? I had such configuration in .ssh\config Host home User root Hostname *my-home-pc-with-ssh-access-allowed* Port 8090 ProxyCommand corkscrew db-isa-01 8080 %h %p ~/.ssh/.corkscrew-db-isa-auth IdentityFile ~/.ssh/id_rsa Where db-isa-01 is my corporate proxy server. Today the admins blocked all https access and allowed it only for few servers on the white list. I used this command to create a tunnel: ssh -D 7070 -o 'GatewayPorts yes' -A -q -g -t root@home and now it doesn't work. As I can understand, that's because our proxy denies all https connections Proxy could not open connnection to ***: Proxy Error ( The specified Secure Sockets Layer (SSL) port is not allowed. Forefront TMG is not configured to allow SSL requests from this port. Most Web browsers use port 443 for SSL requests. ) P.S. I use Windows 7, and corscskrew with cygwin, so Linux solutions not suitable for me.

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• Debian amd64 on Dell Studio 540 reboot hangs

  - by Shcheklein

  Hi, I have Dell Studio 540 desktop and Debian Lenny installed on it: 2.6.26-2-amd64 #1 SMP Tue Mar 9 22:29:32 UTC 2010 x86_64 GNU/Linux The problem is that I can't reboot it. It just hangs after "Will now restart" message. I've already tried: reboot=b, reboot=a, reboot=h kernel options. Nothing helps. Additional info (I can provide any other information): dmidecode System Information Manufacturer: Dell Inc. Product Name: Studio 540 lspci 00:00.0 Host bridge: Intel Corporation 4 Series Chipset DRAM Controller (rev 03) 00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03) 00:1a.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #4 00:1a.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #5 00:1a.2 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #6 00:1a.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #2 00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller 00:1c.0 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Port 1 00:1c.2 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Port 3 00:1c.5 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Port 6 00:1d.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #1 00:1d.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #2 00:1d.2 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #3 00:1d.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #1 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90) 00:1f.0 ISA bridge: Intel Corporation 82801JIR (ICH10R) LPC Interface Controller 00:1f.2 IDE interface: Intel Corporation 82801JI (ICH10 Family) 4 port SATA IDE Controller 00:1f.3 SMBus: Intel Corporation 82801JI (ICH10 Family) SMBus Controller 00:1f.5 IDE interface: Intel Corporation 82801JI (ICH10 Family) 2 port SATA IDE Controller 02:00.0 FireWire (IEEE 1394): JMicron Technologies, Inc. Device 2380 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)

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• KVM Guest with NAT + Bridged networking

  - by Daniel

  I currently have a few KVM Guests on a dedicated server with bridged networking (this works) and i can successfully ping the outside ips i assign via ifconfig (in the guest). However, due to the fact i only have 5 public ipv4 ip addresses, i would like to port forward services like so: hostip:port - kvm_guest:port UPDATE I found out KVM comes with a "default" NAT interface, so added the virtual NIC to the Guest virsh configuration then configured it in the Guest, it has the ip address: 192.168.122.112 I can successfully ping 192.168.122.112 and access all ports on 192.168.122.112 from the KVM Host, so i tried to port forward like so: iptables -t nat -I PREROUTING -p tcp --dport 5222 -j DNAT --to-destination 192.168.122.112:2521 iptables -I FORWARD -m state -d 192.168.122.0/24 --state NEW,RELATED,ESTABLISHED -j ACCEPT telnet KVM_HOST_IP 5222 just hangs on "trying" telnet 192.168.122.112 2521 works [root@node1 ~]# tcpdump port 5222 tcpdump: WARNING: eth0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 23:43:47.216181 IP 1.152.245.247.51183 > null.xmpp-client: Flags [S], seq 1183303931, win 65535, options [mss 1400,nop,wscale 3,nop,nop,TS val 445777813 ecr 0,sackOK,eol], length 0 23:43:48.315747 IP 1.152.245.247.51183 > null.xmpp-client: Flags [S], seq 1183303931, win 65535, options [mss 1400,nop,wscale 3,nop,nop,TS val 445778912 ecr 0,sackOK,eol], length 0 23:43:49.415606 IP 1.152.245.247.51183 > null.xmpp-client: Flags [S], seq 1183303931, win 65535, options [mss 1400,nop,wscale 3,nop,nop,TS val 445780010 ecr 0,sackOK,eol], length 0 7 packets received by filter 0 packets dropped by kernel [root@node1 ~]# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere 192.168.122.0/24 state NEW,RELATED,ESTABLISHED Chain OUTPUT (policy ACCEPT) target prot opt source destination All help is appreciated. Thanks.

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• Block Google requests to 16k using pf firewall

  - by atmosx

  I'd like to block access to Google search using PF after the threshold of 17500 requests (connection established) in 24h, from a host running FreeBSD 9. What I came up with, after reading pf-faq is this rule: pass out on $net proto tcp from any to 'www.google.com' port www flags S/SA keep state (max-src-conn 200, max-src-conn-rate 17500/86400) NOTE: 86400 are 24h in seconds. The rule should work, but PF is smart enough to know that www.google.com resolves in 5 different IPs. So my pfctl -sr output gives me this: pass out on vte0 inet proto tcp from any to 173.194.44.81 port = http flags S/SA keep state (source-track rule, max-src-conn 200, max-src-conn-rate 17500/86400, src.track 86400) pass out on vte0 inet proto tcp from any to 173.194.44.82 port = http flags S/SA keep state (source-track rule, max-src-conn 200, max-src-conn-rate 17500/86400, src.track 86400) pass out on vte0 inet proto tcp from any to 173.194.44.83 port = http flags S/SA keep state (source-track rule, max-src-conn 200, max-src-conn-rate 17500/86400, src.track 86400) pass out on vte0 inet proto tcp from any to 173.194.44.80 port = http flags S/SA keep state (source-track rule, max-src-conn 200, max-src-conn-rate 17500/86400, src.track 86400) pass out on vte0 inet proto tcp from any to 173.194.44.84 port = http flags S/SA keep state (source-track rule, max-src-conn 200, max-src-conn-rate 17500/86400, src.track 86400) PF creates 5 different rules, 1 for each IP that Google resolves. However I have the sense - without being 100% sure, I didn't had the chance to test it - that the number 17500/86400 applies for each IP. If that's the case - please confirm - then it's not what I want. In pf-faq there's another option called source-track-global: source-track This option enables the tracking of number of states created per source IP address. This option has two formats: + source-track rule - The maximum number of states created by this rule is limited by the rule's max-src-nodes and max-src-states options. Only state entries created by this particular rule count toward the rule's limits. + source-track global - The number of states created by all rules that use this option is limited. Each rule can specify different max-src-nodes and max-src-states options, however state entries created by any participating rule count towards each individual rule's limits. The total number of source IP addresses tracked globally can be controlled via the src-nodes runtime option. I tried to apply source-track-global in the above rule without success. How can I use this option in order to achieve my goal? Any thoughts or comments are more than welcome since I'm an amateur and don't fully understand PF yet. Thanks

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• Postfix SMTP server down on Ubuntu

  - by Paddington

  I have a Plesk server running Postfix on Ubuntu 10.04 and the SMTP service on port 25 is down. When I stop and then start postfix the server comes up only for a minute and goes down again. I have checked the load on the server and it is low as shown: *top - 04:29:33 up 19 days, 3:25, 4 users, load average: 1.47, 1.78, 2.34 Tasks: 936 total, 1 running, 935 sleeping, 0 stopped, 0 zombie Cpu(s): 0.7%us, 0.3%sy, 0.0%ni, 86.6%id, 11.7%wa, 0.6%hi, 0.1%si, 0.0%st Mem: 6110496k total, 6072988k used, 37508k free, 251244k buffers Swap: 12000544k total, 95264k used, 11905280k free, 4370432k cached* IMAP clients are not experiencing a problem and there are no issues with receiving emails for both POP or IMAP. Only SMTP (port 25) is a problem. If I ask clients to use the submission port (587) messages are delivered. netstat -lnt shows the following results , so its not a port issue. tcp 0 0 0.0.0.0:25 0.0.0.0: LISTEN tcp 0 0 0.0.0.0:8443 0.0.0.0:* LISTEN*

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• Two Router issue, cannot reach internet

  - by DeBuGGeR

  I have on ADSL router and one CISCO Wifi Router. The ADSL Router is working fine on its own. I am connecting the lan port of the ADSL Router to the internet(RJ45) port of my Cisco wifi router. But I cannot access the internet from the Cisco router, neither through wifi nor through ethernet connection. The IP of ADSL router is 192.168.1.1 and the ip of my Wifi router is 192.168.1.100. Should I connect to the LAN port of my Wifi router rather than using the ethernet port(Marked as Internet)?

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• Linux Mint 14 severe overheating

  - by agvares

  I've tried switching to Mint (it was Mint 12) about 6 months ago, but failed to do it due to enormous overheating which made it virtually impossible to run any applications more complex than Gedit. Time had passed, and now I'm back again with Mint 14, but feeling way more determined. What I face are the following issues: 1) Great overheating (and by great I mean that just by doing nothing my CPU temp is floating around 70-75 C, which I find a lot) 2) Running multiple applications (let's say Chrome, Skype and Pidgin) results in critical overheating and immediate shutdown of the system 3) Due to the stuff listed above, my battery drains in about 10-15 minutes, pretty much turning my laptop into a crippled desktop machine I've got a HP-dv6 laptop (i7, 6gb RAM, dual graphics) Here's the output of lspci: 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5) 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5) 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Whistler XT [AMD Radeon HD 6700M Series] 07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) 0d:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) 13:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader (rev 01) 19:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04) what i've tried to do already: 1) I've edited my grub file to add some "splash" arguments there 2) Installed jupiter and powertop 3) Tried to upgrade to newer kernels (up to 3.8), btw running anything newer than 3.5 results in both resolution and wi-fi detection fail 4) Read lots of forum threads devoted to the topic So, my question is simple: What else might I do to become finally able to use Mint as my default OS without the risk of being burned alive by the CPU heat?

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• suggestions for firewall/router project using *BSD or Linux

  - by Adeodatus

  Hi All, I have a project in mind and I'd love to hear some ideas on some open source solutions with COTS hardware. I have a few 24 and/or 48 port managed layer2 switches with customers potentially on each port (though its usually about 20-30). Right now the switch has a bridged network and backhaul the traffic to our core to a centralized DHCP server. I need to move them to a NAT solution and, while doing this, I'd like to protect the customers on each port from the customer traffic on the other ports. I also need to be able to port forward from the public side of the firewall/nat box to specific hardware on the inside of the nat machine (easy enough, I know). My first thoughts are to build an appliance-like box (the fewer moving parts the better) that can do filtering and NAT with rfc1918 an address range being handed out via a DHCP server on the appliance. A caching DNS server on the appliance would be a plus since we backhaul everything to the core. I'd like to run FreeBSD but I'm open. Now, to try to limit the broadcast traffic thats visible I was thinking of doing each port on the switch as a different vlan and have the switch do trunking to the private NIC on the FreeBSD/appliance. I'd probably need to do some magic on the freebsd NIC to get this working but it should. We have the parts to build these systems. So, does this make sense? Are there any other solutions out there that we don't have to spend money on but can use our parts to create something? Are there any good distros that could do this already (monowall)?? I may or may not admin this solution so a secure web configuration and management tool would be a plus in the other admins' minds. Thoughts?

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• SSH-forwarded X11 display from Linux to Mac lost after some time

  - by mklein9

  I have a new and vexing problem with ssh forwarding my X11 connection when logging in from a Mac (10.7.2) to Linux (Ubuntu 8.04). I have no trouble using ssh -X to log in to the remote machine and starting an X11-based application from that shell. What has recently started happening is that additional invocations of X11 applications from that same shell, after a while (on the order of hours), are unable to start because the forwarded display is being blocked (I presume). When attempting to start xterm, for example, I get the usual message about a bad DISPLAY setting, such as: xterm Xt error: Can't open display: localhost:10.0 But the X11 application I started right when I logged in is still running along just fine, using that exact same display (localhost:10.0), just that it was started earlier. I turned on verbose logging in sshd_config and I see this in the /var/log/auth.log file in response to the failed xterm startup attempt: sshd[22104]: channel 8: open failed: administratively prohibited: open failed If I ssh -X to the server again, starting a new shell and getting assigned a new display (localhost:11.0), the same process repeats: the X11 applications started early on run just fine for as long as I keep them open (days), but after a few hours I cannot start any new ones from that shell. Particulars: OpenSSH sshd server running on Ubuntu 8.04, display forwarded to a Mac running Lion (10.7.2) with the default Apple X server. The systems are connected on an Ethernet LAN with a single switch between them. Neither machine is running a firewall. Until recently (a few days ago) this setup worked perfectly so I am mystified as to where to look next. I am by no means an X11 or SSH expert but have good UNIX/Linux experience. Nothing obvious has changed in either client or server configuration although I have tried changing a few options to try to debug this, like setting sshd_config's TCPKeepAlive to no, and setting "host +localhost" (you can tell I've been Googling). When logging in from a Linux 11.10 laptop to the same remote host over the same network and switch, this problem does not occur -- an xterm can be invoked successfully hours later from the same ssh login shell while the same experiment from the Mac fails (tested this morning to be sure), so it would appear to be a Mac-specific issue. With "LogLevel DEBUG3" set on the remote machine (sshd server), and no change made in the client connections by me, /var/log/auth.log shows one slight change in connection status reports overnight, which is the port number used by the one successful ssh session from the Linux machine (I think), connection #7 below: sshd[20173]: debug3: channel 7: status: The following connections are open:\r\n #0 server-session (t4 r0 i0/0 o0/0 fd 14/13 cfd -1)\r\n #3 X11 connection from 127.0.0.1 port 57564 (t4 r1 i0/0 o0/0 fd 16/16 cfd -1)\r\n #4 X11 connection from 127.0.0.1 port 57565 (t4 r2 i0/0 o0/0 fd 17/17 cfd -1)\r\n #5 X11 connection from 127.0.0.1 port 57566 (t4 r3 i0/0 o0/0 fd 18/18 cfd -1)\r\n #6 X11 connection from 127.0.0.1 port 57567 (t4 r4 i0/0 o0/0 fd 19/19 cfd -1)\r\n #7 X11 connection from 127.0.0.1 port 59007 In this report, everything is the same between status reports except the port number used by connection #7 which I believe is the Linux client -- the only one still maintaining a display connection. It continues to increment over time, judging by a sequence of these reports overnight. Thanks for any help, -Mike

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• Configuring Fortigate OS4 for FTPS

  - by Paul

  I configured iis7 ftp to allow ssl connections. I set the ssl firewall to use ports 50000-50050. If I set up a custom service on my fortigate firewall for ftps with source ports 990-50050 and destination ports 990-50050, set it to a firewall policy and connect from a client it connects and works successfully. If I create a service FTPS Control with source port 990 and destination port 990 and another service,FTP Data with source ports 50000-50050 and destination ports 50000-50050 add them to a group FTPSSL, replace the ftps policy with FTPSSL and try connecting it tries to connect to port 990 and eventually times out. Is there a way to configure the service to only use the ports I need and not every port from 990 up?

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• pound: multiple domains

  - by niklassaers

  Hi guys, I've been using pound to run mydomain.dk. Now I've bought some other domains and SSL certificates that are mydomain.no, mydomain.se and mydomain.eu. My old config looked roughly like this: ListenHTTPS Address 81.19.246.120 Port 443 Cert "/usr/local/etc/pound.keys/mydomain.dk.pem" Service BackEnd Address 10.0.10.10 Port 8080 End End End At places like here I've seen that I can use HeadRequire in the Service part, but I want the Host header to go together with the Cert, ideally something like ListenHTTPS Address 81.19.246.120 Port 443 HostAndCert "mydomain.dk" "/usr/local/etc/pound.keys/mydomain.dk.pem" HostAndCert "mydomain.se" "/usr/local/etc/pound.keys/mydomain.se.pem" HostAndCert "mydomain.no" "/usr/local/etc/pound.keys/mydomain.no.pem" HostAndCert "mydomain.eu" "/usr/local/etc/pound.keys/mydomain.eu.pem" Service BackEnd Address 10.0.10.10 Port 8080 End End End Any suggestions or clues to how I can accomplish this? Cheers Nik

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• Deploying different webapps by different ports in a single JBoss instance

  - by I'm Dario

  I want to setup a single JBoss instance which serves a webapp in a given port and a backend webapp in another port. I know how to config two ports for a single instance but I don't find any clue about how to match a port to an app in JBoss. If it is not possible, I am going to do it with two instances but I would like to know this.

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• Tutorial for configuring OpenVPN [on hold]

  - by user2699451

  I have been through 10+ tutorials on setting up a OpenVPN, and each tutorial gives a different problem... Does anyone know of a decent and helpful website/tutorial which I could go to to get it set up? I have been battling through it for almost 2 months now. Yes, I have also bugged forums.openvpn, but I think I have "reached my post limit" with them. I have to configure it remotely via ssh. UPDATE: okay, I have been asked to be more clear on the topic I followed this tutorial (as a example) - http://www.servermom.com/how-to-build-openvpn-server-on-centos-6-x/732/ I had no issues setting up, etc. except when I boot into windows and run the OpenVPN GUI Client, it connects and gives this error: WARNING: Bad encapsulated packet length from peer (21331), which must be 0 and <= 1576 -- please ensure that --tun-mtu or --link-mtu is equal on both peers -- this condition could also indicate a possible active attack on the TCP link -- [Attemping restart...] Here is my server config: port 1194 #- port proto udp #- protocol dev tun tun-mtu 1500 tun-mtu-extra 32 mssfix 1450 reneg-sec 0 ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt cert /etc/openvpn/easy-rsa/2.0/keys/server.crt key /etc/openvpn/easy-rsa/2.0/keys/server.key dh /etc/openvpn/easy-rsa/2.0/keys/dh1024.pem plugin /usr/lib64/openvpn/plugin/lib/openvpn-auth-pam.so /etc/pam.d/login #- Co$ #plugin /etc/openvpn/radiusplugin.so /etc/openvpn/radiusplugin.cnf #- Uncomment$ client-cert-not-required username-as-common-name server 10.8.0.0 255.255.255.0 push "redirect-gateway def1" push "dhcp-option DNS 8.8.8.8" push "dhcp-option DNS 8.8.4.4" keepalive 5 30 comp-lzo persist-key persist-tun status 1194.log verb 3 and my client config: client dev tun proto udp remote [server ip] 1194 # - Your server IP and OpenVPN Port resolv-retry infinite nobind tun-mtu 1500 tun-mtu-extra 32 mssfix 1450 persist-key persist-tun ca ca.crt auth-user-pass comp-lzo reneg-sec 0 verb 3 OpenVPN Client Log: Thu Oct 31 11:51:29 2013 OpenVPN 2.0.9 Win32-MinGW [SSL] [LZO] built on Oct 1 2006 Thu Oct 31 11:51:44 2013 IMPORTANT: OpenVPN's default port number is now 1194, based on an official port number assignment by IANA. OpenVPN 2.0-beta16 and earlier used 5000 as the default port. Thu Oct 31 11:51:44 2013 WARNING: No server certificate verification method has been enabled. See http://openvpn.net/howto.html#mitm for more info. Thu Oct 31 11:51:44 2013 LZO compression initialized Thu Oct 31 11:51:44 2013 Control Channel MTU parms [ L:1576 D:140 EF:40 EB:0 ET:0 EL:0 ] Thu Oct 31 11:51:44 2013 Data Channel MTU parms [ L:1576 D:1450 EF:44 EB:135 ET:32 EL:0 AF:3/1 ] Thu Oct 31 11:51:44 2013 Local Options hash (VER=V4): '2547efd2' Thu Oct 31 11:51:44 2013 Expected Remote Options hash (VER=V4): '77cf0943' Thu Oct 31 11:51:44 2013 Attempting to establish TCP connection with x.x.x.x:1194 Thu Oct 31 11:51:44 2013 TCP connection established with x.x.x.x:1194 Thu Oct 31 11:51:44 2013 TCPv4_CLIENT link local: [undef] Thu Oct 31 11:51:44 2013 TCPv4_CLIENT link remote: x.x.x.x:1194 // after this it just hangs, nothing happens So I dont know what I am doing wrong but I am getting a bit impatient and on each forum I post this, I get stupid/unrelated/unhelpful answers...

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• I can't externally access my home server's wordpress website

  - by piratepartypumpkin

  Basically, I can access everything just fine using 127.0.0.1, but if I use my external IP (123.123.123.123), I get page not found. My router is port forwarding HTTP port 80 to port 8080 on my servers internal IP address. In other words: (Application: HTTP | Start: 80 | End: 8080 | Protocol: Both | IP Address 192.168.0.101 | Enable [YES]) I know it's forwarding properly, because when I stop port forwarding, I can access my router page by using my external IP. My virtual hosts file is: NameVirtualHost *:80 <VirtualHost *:80> DocumentRoot /opt/lampstack-5.3.16-0/apps/wordpress ServerName example.com ServerAlias www.example.com </VirtualHost> and my httpd.conf file is: Listen 80 Servername localhost:80 DocumentRoot "/opt/lampstack-5.3.16-0/apache2/htdocs <Directory /> Options FollowSymLinks AllowOverride None Order deny, allow deny from all </Directory> <Directory "/opt/lampstack-5.3.16-0/apache2/htdocs"> Options FollowSymLinks AllowOverride None Order allow, deny allow from all </Directory>

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• Debian amd64 on Dell Studio 540 reboot hangs

  - by Shcheklein

  Hi, I have Dell Studio 540 desktop and Debian Lenny installed on it: 2.6.26-2-amd64 #1 SMP Tue Mar 9 22:29:32 UTC 2010 x86_64 GNU/Linux The problem is that I can't reboot it. It just hangs after "Will now restart" message. I've already tried: reboot=b, reboot=a, reboot=h kernel options. Nothing helps. Additional info (I can provide any other information): dmidecode System Information Manufacturer: Dell Inc. Product Name: Studio 540 lspci 00:00.0 Host bridge: Intel Corporation 4 Series Chipset DRAM Controller (rev 03) 00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03) 00:1a.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #4 00:1a.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #5 00:1a.2 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #6 00:1a.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #2 00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller 00:1c.0 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Port 1 00:1c.2 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Port 3 00:1c.5 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Port 6 00:1d.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #1 00:1d.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #2 00:1d.2 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #3 00:1d.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #1 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90) 00:1f.0 ISA bridge: Intel Corporation 82801JIR (ICH10R) LPC Interface Controller 00:1f.2 IDE interface: Intel Corporation 82801JI (ICH10 Family) 4 port SATA IDE Controller 00:1f.3 SMBus: Intel Corporation 82801JI (ICH10 Family) SMBus Controller 00:1f.5 IDE interface: Intel Corporation 82801JI (ICH10 Family) 2 port SATA IDE Controller 02:00.0 FireWire (IEEE 1394): JMicron Technologies, Inc. Device 2380 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)

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