Networking issues, destinations unreachable


#1

I have a VPS here at DH and in the last 48 hours wordpress.org and akismet.com are unreachable from my private server. Either ICMP ping or tcp/80 http connections are dropped, unreachable, lost. The same destinations are perfectly reachable from another source, such as my home.

This is annoying since all akismet antispam and wp upgrades do not work and connections hang until they timeout, causing extra server load.

Has anybody the same problem?

edit: in fact, it seems that all outgoing SYN connections are dropped.

$ ping 72.233.56.138
PING 72.233.56.138 (72.233.56.138) 56(84) bytes of data.
^C
— 72.233.56.138 ping statistics —
9 packets transmitted, 0 received, 100% packet loss, time 8001ms

$ wget http://downloads.wordpress.org/plugin/akismet.2.5.1.zip
–00:45:27-- http://downloads.wordpress.org/plugin/akismet.2.5.1.zip
=> `akismet.2.5.1.zip’
Resolving downloads.wordpress.org… 72.233.56.138, 72.233.56.139
Connecting to downloads.wordpress.org|72.233.56.138|:80… failed: Connection timed out.
Connecting to downloads.wordpress.org|72.233.56.139|:80… failed: Connection timed out.
Retrying.

–00:46:42-- http://downloads.wordpress.org/plugin/akismet.2.5.1.zip
(try: 2) => `akismet.2.5.1.zip’
Connecting to downloads.wordpress.org|72.233.56.138|:80… failed: Connection timed out.
Connecting to downloads.wordpress.org|72.233.56.139|:80… failed: Connection timed out.
Retrying.


#2

I’m not sure if you ever got to the bottom of this, but the same problem has been happening on my PS for months and the only ‘fix’ I’ve found is to restart the PS when the problem happens, which is hardly an ideal solution!

I’m having to restart my server about once a day. If I don’t restart, the server is unable to connect to anything outside of the local PC although I am able to connect via FTP, SSH etc to the server from my local PC and Apache seems to be functioning normally.

The problem is if the server needs to call anything hosted externally (e.g. XML Web Services), even calls to DreamHost Panel API fail. I’ve also tried FTP to an external domain from my PS and connections just time out. So, it’s not just HTTP that is the problem, it seems a generic connectivity issue and I don’t know what the problem might be.

A reboot usually fixes the problem, but I’d like the problem not to be happening in the first place.