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A number of users of pfSense have all shared a single error in our logs ever since the 4096 bit config upgrade. ​ ​ write UDPv4: No buffer space available (code=55)​ ​We have been searching, testing and tweaking trying to figure it out since then. Although we made our systems run better, we never quite got rid of the error. Finally I came accross an answer at the pfSense forums and also the same conclusion at a tunnelblick forum. ​ ​ ​This is affecting many pfSense users. Staff, is there any option we can add to our configs to prevent this? ​ ​https://forum.pfsense.org/index.php?topic=40405.msg208614#msg208614 ​ ​https://code.google.com/p/tunnelblick/issues/detail?id=44#c16 Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:36 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 17:15:28 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 16:57:34 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 16:57:34 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 16:57:34 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 16:57:34 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 16:57:34 openvpn[.....]: write UDPv4: No buffer space available (code=55) Apr 29 16:34:14 openvpn[.....]: Initialization Sequence Completed Apr 29 16:34:14 openvpn[.....]: /sbin/route add -net 10.30.0.1 10.30.x.x 255.255.255.255 Apr 29 16:34:14 openvpn[.....]: NOTE: unable to redirect default gateway -- Cannot read current default gateway from system Apr 29 16:34:14 openvpn[.....]: /usr/local/sbin/ovpn-linkup ovpnc2 1500 1558 10.30.x.x 10.30.x.x init Apr 29 16:34:14 openvpn[.....]: /sbin/ifconfig ovpnc2 10.30.x.x 10.30.x.x mtu 1500 netmask 255.255.255.255 up Apr 29 16:34:14 openvpn[.....]: do_ifconfig, tt->ipv6=1, tt->did_ifconfig_ipv6_setup=0 Apr 29 16:34:14 openvpn[.....]: TUN/TAP device /dev/tun2 opened Apr 29 16:34:14 openvpn[.....]: TUN/TAP device ovpnc2 exists previously, keep at program end Apr 29 16:34:14 openvpn[.....]: ROUTE: default_gateway=UNDEF Apr 29 16:34:14 openvpn[.....]: Could not retrieve default gateway from route socket:: No such process (errno=3) Apr 29 16:34:14 openvpn[.....]: OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified Apr 29 16:34:14 openvpn[.....]: OPTIONS IMPORT: route options modified Apr 29 16:34:14 openvpn[.....]: OPTIONS IMPORT: --ifconfig/up options modified Apr 29 16:34:14 openvpn[.....]: OPTIONS IMPORT: LZO parms modified Apr 29 16:34:14 openvpn[.....]: OPTIONS IMPORT: timers and/or timeouts modified Apr 29 16:34:14 openvpn[.....]: PUSH: Received control message: 'PUSH_REPLY,redirect-gateway def1,dhcp-option DNS 10.30.0.1,comp-lzo no,route 10.30.0.1,topology net30,ping 10,ping-restart 60,ifconfig 10.30.x.x 10.30.x.x' ​