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Jun
19
comment Adding address to known_hosts command line
Does the directory /root/.ssh exist already? It usually doesn't. So you'd need to create it and chmod it correctly. ssh-keyscan won't create the directory for you iirc.
Jun
16
comment Using xhost, display and startx - confused
Ok. So the server B has a working X server and you can access this server additionally via VNC. Did you just try starting the installer? If all of that you say is true, you don't need to set DISPLAY or xhost; you only need that if you want a remote screen displayed locally, without the use of VNC.
Jun
15
comment Using xhost, display and startx - confused
Funky, I understood that he's accessing the client via VNC, and starting the ssh-connection w/ X-redirection from there to the server. In that case; I don't know, but I figure 'just start the installer locally on B' should do it.
Jun
15
comment Using xhost, display and startx - confused
@MichaelHampton even a headless server kann serve X-programs via simple display-redirection & ssh, just the X11 client libraries are needed on the server, not a full-blown X11 installation. And yeah, Oracle is notoriously known for shipping GUI/Java installers...
Jun
15
comment SynProxy can not return syn ack packets with asymmetric dual bridge topology
Can you tell what values the medium_id of the bridge interfaces on synproxy have? Also, what are your actual SYNPROXY rules in all tables?
Jun
15
comment Apache Reverse Proxy with Wildfly?
have you tried accessing wildfly using the URL http://localhost/wildfly/? Mind the trailing slash!
Jun
14
comment Send single stream to multiple users
Yes, a client subscribes to a multicasting group via a protocol, IGMP or PIM. Your local switch forwards this to your next multicasting outer, which will ask his connected routers if they know the route to the service, simply speaking. It works like a routing protocol. The server will only send one copy of each packet to the router, and the router knows on which paths subscribers are listening. Ideally a tree will converge so that only routers on the paths to the clients will get the packets and only forward it on the paths leading to clients. The switches will care for final distribution.
Jun
14
comment Send single stream to multiple users
Multicasting video is the keyword, although it never gained enough momentum to get adopted by regular ISPs. I'll leave this as a comment because the last time I saw a multicasting video stream was in the late 90ies in the German research network DFN.
Jun
14
comment /etc/network/if-pre-up.d/iptables script makeeth interfaces disappear in debian jessie?
Did you try to set post-up /etc/network/if-up.d/iptables in the section of that interface your /etc/network/interfaces?
Jun
14
comment Forwarding of a specific port
That shouldn't happen. I tried replicating your problem with the exact statements, but different IP-addreses, and I got a "No route to host" error. Because I chosed an IP-address on my local network which is not in use. Is it possible that you're using an IP-address of a server which exists and has a service running on tcp/81?
Jun
14
comment What should happen when receiving an ICMP Fragmentation Needed message?
What are the MTUs on the front- and backend sides of the loadbalancer? What is the MTU of your Solaris reverse proxy? How and where is that NAT firewall integrated and is it a DNAT towards the LB or a SNAT on that firewall? Also, setting the DF bit is sensible, because fragmentation leads to severe throughput degradation. I wouldn't look into how to disable the DF but check why the MTU is so... odd. Also, @GregAskew is right; a MTU of 508 octets sounds horribly wrong.
Feb
12
comment Iperf bidirectional bandwidth measurement
For an easy test add a (temporary) Netfilter rule to the INPUT-chain: iptables -t filter -I INPUT -s 192.168.24.243 -p tcp --dport 5001 -j ACCEPT on host 192.168.24.242.
Sep
9
comment Linux unfriendly IIS/ASP.NET :-) : Quick download on windows but slow on linux
There is a netfilter target which can strip tcp options, like timestamps. github.com/wadobo/iptables/blob/master/extensions/…
Aug
28
comment flushed IPs by mistake on UNIX how to recover from rescue
So this is not really an IP-connectivity problem but your server simply doesn't boot up at all? And this interfaces file is from the rescue-system, not from the harddrive? Try mounting the root partition from the harddrive into the rescue system. There, inspect the real interfaces file and look for logs indicating, why the system doesn't boot.
Jan
25
comment Apache sends plain-text response when accessing SSL-enabled site without HTTPS
What Content-type is the server sending? It should be text/html. If it's text/plain instead, something could be wrong with your error-files.
Dec
20
comment DHCPD clean leases on client disconnect
Can you provide us with a config-sniplet of you "on events" declaration?
Mar
22
comment dd-wrt obfsproxy - Cant start on startup or via cron job
Do you really want to start it every minute? Cause this is what the * * * * * says.
Mar
22
comment mysql client can't read query result?
You say "30k simultaneously connected users (users of XMPP servers)". To how many actual simultaneous MySQL-connections does that lead? Also, what is the CPU- and IO-load on the MySQL-server? How many queries? Are these slow queries?
Mar
20
comment NFS unmounted folder having cached files?
@Fakrudeen - it's implied, see the Solaris version of the manual page: "... these are hidden until the file system is unmounted."
Mar
20
comment NFS unmounted folder having cached files?
Fakrudeen: It's in the manual page of mount: "This [mount] tells the kernel to attach the filesystem found on device (which is of type type) at the directory dir. The previous contents (if any) and owner and mode of dir become invisible [...]" And this is what the Solaris manual page says: "mount attaches a file system to the file system hierarchy at the mount_point, which is the pathname of a directory. If mount_point has any contents prior to the mount operation, these are hidden until the file system is unmounted." - it's well defined UNIX behaviour.