try looking at /proc/sys/fs/file-nr and file-max. Sockets are treated as file handles, so this configuration option applies.
The file-nr has 3 numbers in it. The first is peak, the second is current, the third is max.
To increase the max, do "cat new_max > /proc/sys/fs/file-max", where new_max is what you want your new maximum to be.
Remember that these are system-wide settings. To set it for an individual user, you have to use ulimit. Read the man page for ulimit for its use.
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