My serverhost is Minerack, and I was also unable to create a Direwolf_1.7.10 server using their preconfig, though the error was different.
I renamed my main jar file (forge-1.7.10-10.13.2.1235-universal.jar) to my.jar as I was told to by support. I also tried renaming minecraft_server.1.7.10.jar to my.jar, but that just creates a vanilla Minecraft server as expected.
I thought I'd had it set up correctly, here is the crash log;
5.11 14:51:57 [Multicraft] Server stopped
15.11 14:51:57 [Multicraft] Received stop command
15.11 14:51:56 [Multicraft] Server stopped
15.11 14:51:56 [Multicraft] Looks like a crash, check the server console. Return value: 1
15.11 14:51:56 [Multicraft] Server shut down
15.11 14:51:56 [Server] INFO at cpw.mods.fml.relauncher.FMLLaunchHandler.setupServer(FMLLaunchHandler.java:74) [my.jar:?]
15.11 14:51:56 [Server] INFO at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90) [my.jar:?]
15.11 14:51:56 [Server] INFO at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:214) [my.jar:?]
15.11 14:51:56 [Server] INFO at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:346) [my.jar:?]
15.11 14:51:56 [Server] INFO at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:417) [my.jar:?]
15.11 14:51:56 [Server] INFO at java.lang.Class.forName(Class.java:274) ~[?:1.7.0_65]
15.11 14:51:56 [Server] INFO at java.lang.Class.forName0(Native Method) ~[?:1.7.0_65]
15.11 14:51:56 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_65]
15.11 14:51:56 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_65]
15.11 14:51:56 [Server] INFO at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117) ~[launchwrapper-1.11.jar:?]
15.11 14:51:56 [Server] INFO at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[?:1.7.0_65]
15.11 14:51:56 [Server] INFO at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_65]
15.11 14:51:56 [Server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[?:1.7.0_65]
15.11 14:51:56 [Server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:366) ~[?:1.7.0_65]
15.11 14:51:56 [Server] INFO java.lang.ClassNotFoundException: resonant.core.ResonantPluginLoader
15.11 14:51:56 [Server] INFO [14:51:56] [main/ERROR] [FML]: Coremod ResonantPluginLoader: Unable to class load the plugin resonant.core.ResonantPluginLoader
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod openmods.OpenModsCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod openeye.CorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod mrtjp.core.handler.CorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod mcp.mobius.mobiuscore.asm.CoreDescription does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod net.malisis.core.asm.MalisisCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod chylex.java7check.JavaCheckerCoremod does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod cofh.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:56 [Server] INFO [14:51:56] [main/INFO] [STDERR]: [codechicken.core.launch.DepLoader$DepLoadInst:checkExisting:436]: Warning: version of ForgeMultipart, 1.1.0.313 is newer than request 1.1.0.309
15.11 14:51:56 [Server] INFO [14:51:56] [main/INFO] [STDERR]: [codechicken.core.launch.DepLoader$DepLoadInst:checkExisting:436]: Warning: version of MrTJPCore, 1.0.2.4 is newer than request 1.0.1.3
15.11 14:51:56 [Server] INFO [14:51:56] [main/WARN] [FML]: The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:54 [Server] INFO [14:51:54] [main/WARN] [FML]: The coremod mods.battlegear2.coremod.BattlegearLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
15.11 14:51:54 [Server] INFO [14:51:54] [main/INFO] [FML]: Java is OpenJDK 64-Bit Server VM, version 1.7.0_65, running on Linux:amd64:3.13.0-37-generic, installed at /usr/lib/jvm/java-7-openjdk-amd64/jre
15.11 14:51:54 [Server] INFO [14:51:54] [main/INFO] [FML]: Forge Mod Loader version 7.10.85.1235 for Minecraft 1.7.10 loading
15.11 14:51:53 [Server] INFO [14:51:53] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLServerTweaker
15.11 14:51:53 [Server] INFO [14:51:53] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker
15.11 14:51:53 [Server] INFO [14:51:53] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker
15.11 14:51:50 [Multicraft] Loaded config for "Custom Uploaded Jar 256Perm"
15.11 14:51:50 [Multicraft] Starting server!
15.11 14:51:50 [Multicraft] Loading server properties
I renamed my main jar file (forge-1.7.10-10.13.2.1235-universal.jar) to my.jar as I was told to by support. I also tried renaming minecraft_server.1.7.10.jar to my.jar, but that just creates a vanilla Minecraft server as expected.
I thought I'd had it set up correctly, here is the crash log;