Tag Archive for 'Networking'

Booting Linux on Cisco 7513

Published
by
Administrator
1 year, 1 month ago
in Linux and Networking
. 0 Comments

Today I was reconfiguring a Cisco 7513 with a RSP 16 and a FastEthernet module inside.
So I did a “erase nvram” and a “reload”. After booting I was surprised to see the following in my Terminal:

Would you like to enter the initial configuration dialog? [yes/no]:
Loading pxelinux.0 from 10.42.10.50 (via FastEthernet4/0/0): !!!
[OK - 13156 bytes]

So the box took an IP via DHCP and tried to netboot. (Un)fortunately it only breaks my terminal, so no worries! ;)

Is DNSSEC ready for wild life?

Published
by
cyco
1 year, 3 months ago
in Networking
. 1 Comment

Today the RIPE DNS for LIRs Training Course did take place. (some not up to date course material can be found here)
Managing some thousands of zones inclusive nameserver infrastructure behind since several years, I thought it would be neat to provide a secure dns chain to our costumers.
After going deeper into the material within the course, I recognized the following impacts:

  • only bind9 (>= 9.3) and NSD privides support (yet)
  • bandwidth will be increased 2-3 times with max. key size
  • increased memory usage depending on your server software
  • operational costs will increasing dramaticaly due significant higher amount of regular work
  • more computing power (hardware) needed to generate dnssec ready zones and signing
  • unknown influence on resolving nameservers (load/memory/bandwidth)
  • chain of trust ends at resolving nameserver and is not provided to enduser

Since the last issue isn’t solved (yet), it doesn’t make any sence for me to invest resources into setting up DNSSec infrastructur, cause the end user would not recognize if the communication with the resolving nameserver or the resolving nameserver itself is taken over.

Any complaints and/or hint? Did I missed something?

Wireless Bridge and WPA(2) on Linksys Router … or how to look for a needle in a haystack

Published
by
cyco
2 years ago
in Linux, Networking, OpenSource, OpenWRT and WLan
. 0 Comments

I was searching half a night and 2 hours today to get a Linksys Router working a wireless bridge with WPA(2) encryption. I tried Openwrt White Russian RC5 and DD-Wrt V23 SP1 and many combinations of WPA, WPA2, TKIP, AES. The bridge works well with WEP and without any encryption….

Continue reading ‘Wireless Bridge and WPA(2) on Linksys Router … or how to look for a needle in a haystack’

WRTSL54GS debridged

Published
by
cyco
2 years ago
in Linux, Networking, OpenSource, OpenWRT and WLan
. 0 Comments

Okay … we got the serial port running (same like WRT54GS), so we could be more risky. After some tries I decided to work analog the WRT54G models.

Continue reading ‘WRTSL54GS debridged’

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