wiki/creating-ec2-image-from-scratch.md
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@@ -52,4 +52,22 @@ rc5.d/S95sailing
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rc6.d/K10sailing
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```
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-Linked /etc/profile.d/sailing.sh to /home/sailing/code/configuration/sailing.sh. As this contains a PATH entry for /opt/amazon and the new image has the Amazon scripts at /opt/aws, I aldo created a symbolic link from /opt/amazon to /opt/aws to let this same path configuration find those scripts under the old and the new images.
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+Linked /etc/profile.d/sailing.sh to /home/sailing/code/configuration/sailing.sh. As this contains a PATH entry for /opt/amazon and the new image has the Amazon scripts at /opt/aws, I aldo created a symbolic link from /opt/amazon to /opt/aws to let this same path configuration find those scripts under the old and the new images.
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+
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+Added the lines
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+```
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+# number of connections the firewall can track
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+net.ipv4.ip_conntrac_max = 131072
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+```
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+
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+to `/etc/sysctl.conf` in order to increase the number of connections that are possible concurrently.
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+
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+Added the following two lines to `/etc/security/limits.conf`:
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+
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+```
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+* hard nproc unlimited
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+* hard nofile 65000
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+```
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+
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+This increases the maximum number of open files allowed from the default 1024 to a more appropriate 65k.
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